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Review Guide

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ISBN 13: 978-0-55401899-7

ISBN 10: 0-55-401899-3

1 2 3 4 5 6 054 12 11 10 09 08

Contents

Original content Copyright © by Holt, Rinehart and Winston; a Division of Houghton Mifflin Harcourt Publishing Company.

Additions and changes to the original content are the responsibility of the instructor.

Holt Science and Technology iii Review Guide

Science in Our World

Section Review

Science and Scientists ...................................................................................... 1

Scientific Methods............................................................................................ 3

Scientific Models.............................................................................................. 5

Science and Engineering .................................................................................. 7

Tools, Measurement, and Safety ...................................................................... 9

Chapter Review ...................................................................................................... 11

Interactions of Living Things

Section Review

Everything Is Connected ................................................................................ 16

Living Things Need Energy ........................................................................... 18

Types of Interactions ...................................................................................... 20

Chapter Review ......................................................................................23

Cycles in Nature

Section Review

The Cycles of Matter ...................................................................................... 29

Ecological Succession .................................................................................... 31

Chapter Review ......................................................................................33

The Earth’s Ecosystems

Section Review

Land Biomes .................................................................................................. 40

Marine Ecosystems ........................................................................................ 42

Freshwater Ecosystems .................................................................................. 44

Chapter Review ......................................................................................46

The Movement of Ocean Water

Section Review

Currents .......................................................................................................... 53

Currents and Climate...................................................................................... 55

Waves ............................................................................................................. 57

Chapter Review ......................................................................................60

Contents



Holt Science and Technology iv Review Guide

The Atmosphere

Section Review

Characteristics of the Atmosphere ................................................................. 66

Atmospheric Heating...................................................................................... 68

Global Winds and Local Winds ..................................................................... 70

Air Pollution ................................................................................................... 72

Chapter Review ......................................................................................75

Understanding Weather

Section Review

Water in the Air.............................................................................................. 81

Air Masses and Fronts .................................................................................... 83

Severe Weather .............................................................................................. 85

Forecasting the Weather ................................................................................. 87

Chapter Review ......................................................................................89

Stars, Galaxies, and the Universe

Section Review

Stars ................................................................................................................ 94

The Life Cycle of Stars .................................................................................. 96

Galaxies .......................................................................................................... 98

Formation of the Universe............................................................................ 100

Chapter Review ....................................................................................102

A Family of Planets

Section Review

Our Solar System ......................................................................................... 107

The Inner Planets.......................................................................................... 109

The Outer Planets ......................................................................................... 111

Moons........................................................................................................... 113

Small Bodies in the Solar System ................................................................ 115

Chapter Review ....................................................................................117

Contents



Holt Science and Technology v Review Guide

Earth, Sun, and Moon

Section Review

Days and Seasons on Earth .......................................................................... 123

Lunar Cycles ................................................................................................ 125

Tides, the Sun, and the Moon....................................................................... 127

Chapter Review ....................................................................................129

Exploring Space

Section Review

Rocket Science ............................................................................................. 133

Artificial Satellites........................................................................................ 135

Space Probes ................................................................................................ 137

People in Space ............................................................................................ 139

Chapter Review ....................................................................................141

Energy and Energy Resources

Section Review

What Is Energy? ........................................................................................... 146

Energy Conversions ..................................................................................... 148

Conservation of Energy................................................................................ 150

Energy Resources ......................................................................................... 152

Chapter Review ....................................................................................154

Heat and Heat Technology

Section Review

Temperature ................................................................................................. 159

What Is Heat? ............................................................................................... 162

Matter and Heat ............................................................................................ 164

Heat Technology .......................................................................................... 166

Chapter Review ....................................................................................168

Electricity

Section Review

Electric Charge and Static Electricity .......................................................... 173

Electric Current and Electrical Energy......................................................... 176

Electrical Calculations.................................................................................. 178

Electric Circuits............................................................................................ 180

Chapter Review ....................................................................................182


Name_______________________________Class __________________ Date __________________



Holt Science and Technology 1 Science in Our World

Skills Worksheet

Section Review

Science and Scientists USING KEY TERMS

1. In your own words, write a definition for the term science.

_______________________________________________________________

_______________________________________________________________

UNDERSTANDING KEY IDEAS

2. How do scientists investigate their questions?

_______________________________________________________________

_______________________________________________________________

3. What are three ways that knowledge gained through scientific discoveries can benefit the world around you?

_______________________________________________________________

_______________________________________________________________

_____ 4. Which of the following careers does NOT rely on science? a. environmental science b. cartography c. zoology d. None of the above

5. What are some resources that you can use to do research?

_______________________________________________________________

_______________________________________________________________

MATH SKILLS

6. If recycling 1 metric ton of paper saves 4,500 kWh of energy, how much energy is saved by recycling 2.75 metric tons of paper? Show your work below.

Name_______________________________Class __________________ Date __________________




Section Review continued

7. Imagine that you are a cartographer who needs to draw a map that has the following scale: 1 cm = 1 m. How long would the line representing a wall that is 8.5 m long be? Show your work below.

CRITICAL THINKING

8. Consumer Focus Your family usually buys the leading brand of toothpaste. A 5 oz. tube of this toothpaste costs $3.00. You notice that a 5 oz. tube of another brand costs $2. Which brand is cheaper? What other information would you need in order to decide which brand was a better value?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

9. Applying Concepts Imagine that you were camping during a meteor shower. You were amazed at what you saw, and you wanted to know what causes a shooting star. Name two ways that you could investigate the cause of a shooting star.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________




Skills Worksheet

Section Review

Scientific Methods USING KEY TERMS

1. Use the following terms in the same sentence: scientific methods,

observations, hypothesis, and data.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________


_____ 2. Which of the following statements about the steps of scientific methods is true? a. Steps must always be used in the same order. b. All steps must be used. c. Steps are repeated sometimes. d. The steps must support the hypothesis.

_____ 3. The following statements could have been made during Gillette’s field investigation. Which statement is a testable hypothesis? a. Dinosaur bones were found in New Mexico. b. The bones are from a known dinosaur. c. One of the ribs is 2 m long. d. The first step in studying the bones is to dig them out of the ground.

4. What is an observation? Write down one observation about the room you are in at this moment.

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





5. What is a controlled experiment?

_______________________________________________________________

_______________________________________________________________

CRITICAL THINKING

6. Analyzing Processes How could two scientists working to answer the same question draw different conclusions?

_______________________________________________________________

_______________________________________________________________

7. Applying Concepts What are two ways that you could analyze data about temperature changes over many years? What are the benefits and limitations of each method?

_______________________________________________________________

_______________________________________________________________

INTERPRETING GRAPHICS

8. The table below shows how long one bacterium takes to divide into two bacteria. Plot the data on a graph. Put temperature on the x-axis and the time to double on the y-axis. Do not graph values for which there is no growth. What temperature allows the bacteria to grow the fastest?

Temperature

(ºC)

Time to double

(min)

10 130

20 60

25 40

30 29

37 17

40 19

45 32

50 no growth

Name_______________________________Class __________________ Date __________________




Skills Worksheet

Section Review

Scientific Models USING KEY TERMS

In each of the following sentences, replace the incorrect term with the correct term from the word bank.

theory model law

1. A conclusion is an explanation that matches many hypotheses but may still change.

_______________________________________________________________

_______________________________________________________________

2. A hypothesis tells you exactly what to expect in a situation.

_______________________________________________________________

_______________________________________________________________

3. A variable represents an object or a system.

_______________________________________________________________

_______________________________________________________________


4. What are the three main types of models?

_______________________________________________________________

_______________________________________________________________

5. How do scientists form theories and laws?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

MATH SKILLS

6. If Jerry is 2.1 m tall, how tall is a scale model of Jerry that is 10% of his size? Show your work below.

Name_______________________________Class __________________ Date __________________





CRITICAL THINKING

7. Applying Concepts Draw a map showing the way from your school to your home. What type of model have you made? Identify any symbols you used to represent things on your map. What are some limitations of your model?

8. Forming Hypotheses How could you obtain data from a solar system model that you can use to hypothesize why the moon appears to change shape?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________




Skills Worksheet

Section Review

Science and Engineering USING KEY TERMS

Complete each of the following sentences by choosing the correct term from the word bank. engineering science technology cost-benefit analysis

1. ______________________ is the use of science and mathematics to develop

technologies that can solve problems.

2. People study ______________________ to understand the natural world.

3. A ______________________ can tell if a new technology will be affordable

to produce.


_____ 4. Which of the following is a step in the engineering design process? a. Identifying and Researching a Need b. Modifying and Retesting the Solution c. Making a Prototype d. all of the above

_____ 5. Which of the following is an adaptive bioengineered product? a. a pair of crutches b. an artificial heart c. a pair of eyeglasses d. a hearing aid

6. What are prototypes and why are they built as part of the engineering design process?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





MATH SKILLS

7. Engineers are working on a cost-benefit analysis for a new car model. They drove the car, used three gallons of gasoline, and traveled 225 miles. How many miles per gallon did the car get? Show your work below.

CRITICAL THINKING

8. Applying Concepts Think about the technology of airplanes. How have the benefits of airplane travel changed society? What are some of the unintended consequences of airplanes, and how have they impacted society?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

9. Applying Concepts In the engineering design process, does each step occur only once? Explain your reasoning.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________




Skills Worksheet

Section Review

Tools, Measurement, and Safety USING KEY TERMS

Complete each of the following sentences by choosing the correct term from the word bank.

area mass volume temperature

1. The measure of the surface of an object is called ______________________.

2. Scientists use kilograms when measuring an object’s

______________________.

3. The ______________________ of a liquid is usually described in liters.


_____ 4. SI units are a. always based on standardized measurements of body parts. b. almost always based on the number 10. c. used to measure only length. d. used only in France.

5. What are three units that are used to measure temperature?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

6. If you were going to measure the mass of a fly, which SI unit would be most appropriate?

_______________________________________________________________

_______________________________________________________________

7. Describe three different kinds of tools, and give an example of each kind of tool.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





MATH SKILLS

8. What is the area of a garden that is 12 m long and 8 m wide? Show your work below.

9. What is the volume of a box if the sides of the box are each 1 m in length? Show your work below.

CRITICAL THINKING

10. Predicting Consequences Give an example of what could happen if you do not follow safety rules about animal safety.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

11. Applying Concepts During an experiment, you must mix chemicals in a glass beaker. What should you wear to protect yourself during this experiment?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________




Skills Worksheet

Chapter Review

USING KEY TERMS

Complete each of the following sentences by choosing the correct term from the

word bank.

models science bioengineering hypothesis

1. The process of gathering knowledge about the natural world is called

______________________.

2. An explanation that is based on prior scientific research or observations and

that can be tested is called a ______________________.

3. ______________________ is the application of engineering to living things.


Multiple Choice

_____ 4. A good way to investigate answers to scientific questions is to a. do research only. b. make observations only. c. do experiments only. d. do research, make observations, and do experiments.

_____ 5. A pencil measures 14 cm long. How many millimeters long is it? a. 1.4 mm c. 1,400 mm b. 140 mm d. 1,400,000 mm

_____ 6. Which of the following units is NOT an SI unit? a. meter c. liter b. foot d. degree Celsius

_____ 7. Which of the following statements describes a limitation of models? a. Models are large enough to be seen. b. Models do not act exactly like the things that they model. c. Models are smaller than the thing that they model. d. Models use familiar things to model unfamiliar things.

Name_______________________________Class __________________ Date __________________




Chapter Review continued

_____ 8. Which of the following is a negative unintended consequence of the automobile? a. It transports people to see family and friends. b. It causes traffic congestion. c. It gives people an alternative way to get to work. d. Repair and maintenance of automobiles create jobs for people.

Short Answer

9. How could a hypothesis that is proven to be false lead to new scientific investigations?

_______________________________________________________________

_______________________________________________________________

10. How and why do engineers use models?

_______________________________________________________________

_______________________________________________________________

11. What problems could occur if scientists did not communicate the results of their investigations?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

12. What problems could occur if the International System of Units were not used?

_______________________________________________________________

_______________________________________________________________

CRITICAL THINKING

13. Making Comparisons An oral thermometer and an artificial heart are both bioengineered technologies. Tell if each is an assistive or adaptive technology. Explain your answers.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





14. Analyzing Processes Design a simple investigation to determine the best material for making a kite. List the controls, the variables, the tools you will need, and the process for your experiment.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

15. Analyzing Processes An engineer is working on a new technology for making skyscrapers that can withstand earthquakes. Why would the engineer build a model of the building using this new technology?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

16. Analyzing Processes Design an experiment to determine the amount of rain that falls at your school over the course of a month. List all the tools that you will need and tell why you need each tool.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

17. Evaluating Conclusions How could a scientist respond to another scientist who questioned her conclusion?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





18. Evaluating Conclusions The cell phone has responded to society’s need to increase communications. Tell which need or needs each of the following technologies has met: computers, X-ray machines, and ATMs.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

19. Drawing Conclusions The automobile has been around for a long time. What are some of the intended benefits and unintended consequences of the automobile? What unintended consequences do you think still need to be solved, and how have they impacted society?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________






Use the graph below to answer the questions that follow.

20. Has the amount of CO2 in the atmosphere increased or decreased since 1860?

_______________________________________________________________

_______________________________________________________________

21. The line on the graph is curved. What does this curve indicate?

_______________________________________________________________

_______________________________________________________________

22. Was the rate of change in the level of CO2 between 1940 and 1960 higher or lower than it was between 1880 and 1900? How can you tell?

_______________________________________________________________

_______________________________________________________________

23. You are a scientist looking at this graph. What questions would you ask to determine the cause of the increase in CO2?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________



Holt Science and Technology 16 Interactions of Living Things

Skills Worksheet

Section Review

Everything Is Connected USING KEY TERMS

1. In your own words, write a definition for the term ecology.

_______________________________________________________________

_______________________________________________________________

2. Use the following terms in the same sentence: biotic and abiotic.

_______________________________________________________________

_______________________________________________________________


_____ 3. Which one of the following is the highest level of environmental organization? a. ecosystem c. population b. community d. organism

4. What makes up a community?

_______________________________________________________________

_______________________________________________________________

5. Create a graphic organizer to show how changing one abiotic element can affect an ecosystem.

_______________________________________________________________

_______________________________________________________________

MATH SKILLS

6. From sea level, the biosphere goes up about 9 km and down about 19 km. What is the thickness of the biosphere in meters? Show your work below.

Name_______________________________Class __________________ Date __________________





CRITICAL THINKING

7. Analyzing Relationships What would happen to the other organisms in the salt-marsh ecosystem if the cordgrass suddenly died?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

8. Identifying Relationships Explain in your own words what people mean when they say that everything is connected.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

9. Analyzing Ideas Do ecosystems have borders? Explain your answer.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________




Skills Worksheet

Section Review

Living Things Need Energy USING KEY TERMS

1. Use each of the following terms in a separate sentence: herbivores, carnivores, and omnivores.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

2. In your own words, write a definition for each of the following terms: food chain, food web, and energy pyramid.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________


_____ 3. Herbivores, carnivores, and scavengers are all examples of a. producers. b. decomposers. c. consumers. d. omnivores.

4. Explain the importance of decomposers in an ecosystem.

_______________________________________________________________

_______________________________________________________________

5. Describe how producers, consumers, and decomposers are linked in a food chain.

_______________________________________________________________

_______________________________________________________________

6. Describe how energy flows through a food web.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





MATH SKILLS

7. The plants in each square meter of an ecosystem obtained 20,810 Calories of energy from sunlight per year. The herbivores in that ecosystem ate all the plants but obtained only 3,370 Calories of energy. How much energy did the plants use? Show your work below.

CRITICAL THINKING

8. Identifying Relationships Draw two food chains, and depict how they link together to form a food web.

9. Applying Concept Are consumers found at the top or bottom of an energy pyramid? Explain your answer.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

10. Predicting Consequences What would happen if a species disappeared from an ecosystem?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________




Skills Worksheet

Section Review

Types of Interactions USING KEY TERMS

1. In your own words, write a definition for the term carrying capacity.

_______________________________________________________________

_______________________________________________________________

2. Use each of the following terms in a separate sentence: mutualism, commensalism, and parasitism.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________


_____ 3. Which of the following is NOT a prey adaptation? a. camouflage b. chemical defenses c. warning coloration d. parasitism

4. Identify two things organisms compete with one another for.

_______________________________________________________________

_______________________________________________________________

5. Briefly describe one example of a predator-prey relationship. Identify the predator and the prey.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





CRITICAL THINKING

6. Identifying Relationships Describe how hummingbirds and flowers have come to depend on each other.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

7. Identifying Relationships Explain the probable relationship between the giant Rafflesia flower, which smells like rotting meat, and the carrion flies that buzz around it. (Hint: Carrion means “rotting flesh.”)

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

8. Predicting Consequences Predict what might happen if all of the ants were removed from an acacia tree.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________






The population graph below shows the growth of a species of Paramecium (single-

celled microorganism) over 18 days. Food was added to the test tube occasionally.

Use this graph to answer the questions that follow.

Paramecium caudatum Growth

9. What is the carrying capacity of the test tube as long as food is added?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

10. Predict what will happen if no more food is added.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

11. What keeps the number of Paramecium at a steady level?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________




Skills Worksheet

Chapter Review

USING KEY TERMS

1. Use each of the following terms in a separate sentence: symbiosis, mutualism,

commensalism, and parasitism.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________


word bank.

biotic abiotic ecosystem community

2. The environment includes ______________________ factors including water,

rocks, and light.

3. The environment also includes ______________________, or living, factors.

4. A community of organisms and their environment is called a(n)

______________________.

For each pair of terms, explain how the meanings of the terms differ.

5. community and population

_______________________________________________________________

_______________________________________________________________

6. ecosystem and biosphere

_______________________________________________________________

_______________________________________________________________

7. producers and consumers

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________






Multiple Choice

_____ 8. A tick sucks blood from a dog. In this relationship, the tick is the __________ and the dog is the __________. a. parasite, prey c. parasite, host b. predator, host d. host, parasite

_____ 9. Resources such as water, food, or sunlight are likely to be limiting factors a. when population size is decreasing. b. when predators eat their prey. c. when the population is small. d. when a population is approaching the carrying capacity.

_____ 10. Nature’s recyclers are a. predators. c. producers. b. decomposers. d. omnivores.

_____ 11. A beneficial association between coral and algae is an example of a. commensalism. c. mutualism. b. parasitism. d. predation.

_____ 12. The process by which energy moves through an ecosystem can be represented by a. food chains. c. food webs. b. energy pyramids. d. All of the above

_____ 13. Which organisms does the base of an energy pyramid represent? a. producers c. herbivores b. carnivores d. scavengers

_____ 14. Which of the following is the correct order in a food chain?

a. sun producers herbivores scavengers carnivores

b. sun consumers predators parasites hosts

c. sun producers decomposers consumers omnivores

d. sun producers herbivores carnivores scavengers

_____ 15. Remoras and sharks have a relationship that is best described as a. mutualism. b. commensalism. c. predator and prey. d. parasitism.

Name_______________________________Class __________________ Date __________________





SHORT ANSWER

16. Describe how energy flows through a food web. You may draw a food web to explain your answer.

_______________________________________________________________

_______________________________________________________________

17. Explain how the food web changed when the gray wolf disappeared from Yellowstone National Park.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

18. How do limiting factors affect the carrying capacity of an environment?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





CRITICAL THINKING

19. Concept Mapping Use the following terms to create a concept map: herbivores, organisms, producers, populations, ecosystems, consumers,

communities, carnivores, and biosphere.

Name_______________________________Class __________________ Date __________________





20. Identifying Relationships Could a balanced ecosystem contain producers and consumers but not decomposers? Why or why not?

_______________________________________________________________

_______________________________________________________________

21. Predicting Consequences Some biologists think that certain species, such as alligators and wolves, help maintain biological diversity in their ecosystems. Predict what might happen to other organisms, such as gar fish or herons, if alligators were to become extinct in the Florida Everglades.

_______________________________________________________________

_______________________________________________________________


Use the energy pyramid below to answer the questions that follow.

22. According to the energy pyramid, are there more prairie dogs or plants?

_______________________________________________________________

_______________________________________________________________

23. What level has the most energy?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

24. Would an energy pyramid such as this one exist in nature?

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





25. How could you change this pyramid to look like one representing a real ecosystem? What is the relationship between the organisms in the energy pyramid?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

26. Imagine that you were designing a new line of camouflage clothing for use in one specific environment.

• Choose the environment and make an initial design plan that includes a list of design constraints.

• Construct a prototype. Present your prototype to the class and explain its features.

Name_______________________________Class __________________ Date __________________



Holt Science and Technology 29 Cycles in Nature

Skills Worksheet

Section Review

The Cycles of Matter USING KEY TERMS


1. evaporation and condensation

_______________________________________________________________

_______________________________________________________________

2. decomposition and combustion

_______________________________________________________________

_______________________________________________________________


_____ 3. Nitrogen fixation a. is done only by plants. b. is done mostly by bacteria. c. is how animals make proteins. d. is a form of decomposition.

4. Describe the water cycle.

_______________________________________________________________

_______________________________________________________________

5. Describe the carbon cycle.

_______________________________________________________________

_______________________________________________________________

MATH SKILLS

6. The average person in the United States uses about 78 gal of water each day. How many liters of water does this equal? How many liters of water will the average person use in a year? Show your work below.

Name_______________________________Class __________________ Date __________________





CRITICAL THINKING

7. Analyzing Processes Draw a simple diagram of each of the cycles discussed in this section. Draw lines between the cycles to show how parts of each cycle are related.

8. Concept Mapping Use a graphic organizer to illustrate how the calcium in an animal’s bones might be cycled back into the environment.

Name_______________________________Class __________________ Date __________________




Skills Worksheet

Section Review

Ecological Succession USING KEY TERMS

1. In your own words, write a definition for the term succession.

_______________________________________________________________

_______________________________________________________________


_____ 2. An area where a glacier has just melted away will begin the process of a. primary succession. b. secondary succession. c. stability. d. regrowth.

3. Describe succession that takes place in an abandoned field.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

4. Describe a mature community. How does a mature community develop?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

MATH SKILLS

5. The fires in 1988 burned 739,000 of the 2.2 million acres that make up Yellowstone National Park. What percentage of the park was burned? Show your work below.

Name_______________________________Class __________________ Date __________________





CRITICAL THINKING

6. Applying Concepts Give an example of a community that has a high degree of biodiversity, and an example of one that has a low degree of biodiversity.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

7. Analyzing Ideas Explain why soil formation is always the first stage of primary succession. Does soil formation ever stop? Explain your answer.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________




Skills Worksheet

Chapter Review

USING KEY TERMS


word bank.

evaporation condensation precipitation decomposition combustion succession

1. The breakdown of dead materials into carbon dioxide and water is called

______________________.

2. The gradual development of a community over time is called

______________________.

3. During ______________________, the heat causes water to change from

liquid to vapor.

4. ______________________ is the process of burning a substance.

5. Water that falls from the atmosphere to the land and oceans is

______________________.

6. In the process of ______________________, water vapor cools and returns to

a liquid state.


Multiple Choice

_____ 7. Clouds form in the atmosphere through the process of a. precipitation. c. condensation. b. respiration. d. decomposition.

_____ 8. Which of the following statements about groundwater is true? a. It stays underground for a few days. b. It is stored in underground caverns or porous rock. c. It is salty like ocean water. d. It never reenters the water cycle.

_____ 9. Burning gas in an automobile is a type of a. combustion. c. decomposition. b. respiration. d. photosynthesis.

_____ 10. Nitrogen in the form of a gas can be used directly by some kinds of a. plants. c. bacteria. b. animals. d. fungi.

Name_______________________________Class __________________ Date __________________





_____ 11. Bacteria are most important in the process of a. combustion. c. nitrogen fixation. b. condensation. d. evaporation.

_____ 12. The pioneer species on bare rock are usually a. ferns. c. mosses. b. pine trees. d. lichens.

_____ 13. Which of the following is an example of primary succession? a. the recovery of Yellowstone National Park following the fires of

1988 b. the appearance of lichens and mosses in an area where a glacier has

recently melted away c. the growth of weeds in a field after a farmer stops using the field d. the growth of weeds in an empty lot that is no longer being mowed

_____ 14. One of the most common plants in a recently abandoned farm field is a. oak or maple trees. b. pine trees. c. mosses. d. crabgrass.

Short Answer

15. In what forms can water on Earth be found?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

16. Earth’s atmosphere is mostly made up of what substance?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

17. Compare and contrast the two forms of succession.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





CRITICAL THINKING

18. Concept Mapping Create a concept map to show the role that animals have in the carbon cycle.

Name_______________________________Class __________________ Date __________________





19. Concept Mapping Create a concept map to show the role that humans have in the carbon cycle.

Name_______________________________Class __________________ Date __________________





20. Concept Mapping Use the following terms to create a concept map: abandoned farmland, lichens, bare rock, soil formation, horseweed, succession, forest fire, primary succession, secondary succession, and pioneer

species.

Name_______________________________Class __________________ Date __________________





21. Identifying Relationships Is snow a part of the water cycle? Why or why not?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

22. Analyzing Processes Make a list of several places where water might be found on Earth. For each item on your list, state how it is part of the water cycle.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

23. Forming Hypotheses Predict what would happen if the water on Earth suddenly stopped evaporating.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

24. Forming Hypotheses Predict what would happen if all of the bacteria on Earth suddenly disappeared.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

25. Making Inferences Describe why a lawn usually doesn’t go through succession.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

26. Making Inferences Can one scientist observe all of the stages of secondary succession on an abandoned field? Explain your answer.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________






The graph below shows how water is used each day by an average household in

the United States. Use the graph to answer the questions that follow.

AVERAGE HOUSEHOLD DAILY WATER USE

_____ 27. According to this graph, which of the following activities uses the greatest amount of water? a. bathing b. toilet flushing c. washing laundry d. There is not enough information to determine the answer.

28. An average family used 380 L of water per day, until they stopped washing their car, stopped watering their lawn, and stopped using their pool. Now, how much water per day do they use?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________



Holt Science and Technology 40 The Earth’s Ecosystems

Skills Worksheet

Section Review

Land Biomes USING KEY TERMS

1. Use each of the following terms in a separate sentence: biome and tundra.

_______________________________________________________________

_______________________________________________________________

2. In your own words, write a definition for each of the following terms: savanna and desert.

_______________________________________________________________

_______________________________________________________________


_____ 3. Components of a desert ecosystem include

a. a hot, dry climate. b. plants that grow far apart. c. animals that are active mostly at night. d. All of the above

4. Create a poster presentation showing seven land biomes and two major facts about each of them.

5. What are two things that characterize a biome?

_______________________________________________________________

_______________________________________________________________

CRITICAL THINKING

6. Making Inferences While excavating an area in the desert, a scientist discovers the fossils of very large trees and ferns. What might the scientist conclude about biomes in this area?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





7. Analyzing Ideas Tundra receives very little rainfall. Could tundra accurately be called a frozen desert? Explain your answer.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________


Use the bar graph below to answer the questions that follow.

8. Which biomes receive 50 cm or more of rain?

_______________________________________________________________

9. Which biome receives the smallest amount of rain? the largest amount of rain?

_______________________________________________________________

10. What is the purpose of the different colors in this bar graph?

_______________________________________________________________

Name_______________________________Class __________________ Date __________________




Skills Worksheet

Section Review

Marine Ecosystems USING KEY TERMS

1. Use each of the following terms in a separate sentence: plankton and estuary.

_______________________________________________________________

_______________________________________________________________


_____ 2. Water temperature a. has no effect on the animals in a marine ecosystem. b. affects the types of organisms that can live in a marine ecosystem. c. decreases gradually as water gets deeper. d. increases as water gets deeper.

3. What are three abiotic factors that affect marine ecosystems?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

4. Create a poster presentation illustrating differences among the four major ocean zones.

5. Use a food chain to demonstrate the interdependence of organisms within a marine ecosystem.

MATH SKILLS

6. The ocean covers about 71% of the Earth’s surface. If the total surface area of the Earth is about 510 million square kilometers, how many square kilometers are covered by the ocean? Show your work below.

Name_______________________________Class __________________ Date __________________





CRITICAL THINKING

7. Making Inferences Animals in the Sargasso Sea hide from predators by blending in with the sargassum. Color is only one way to blend in. What is another way that animals can blend in with sargassum?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

8. Identifying Relationships Many fishes and other organisms that live in the deep ocean produce light. What are two ways in which this light might be useful?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

9. Applying Concepts Imagine that you are studying animals that live in intertidal zones. You just discovered a new animal. Describe the animal and adaptations the animal has to survive in the intertidal zone.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________




Skills Worksheet

Section Review

Freshwater Ecosystems USING KEY TERMS

1. Use the following terms in the same sentence: wetland, marsh, and swamp.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________


_____ 2. A major abiotic factor in freshwater ecosystems is the a. source of the water. b. speed of the water. c. width of the stream or river. d. None of the above

3. Create a poster presentation to illustrate differences between the zones of a lake and the zones of an ocean.

4. Explain how a lake can become a forest over time.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

MATH SKILLS

5. Sunlight can penetrate a certain lake to a depth of 15 m. The lake is five and a half times deeper than the depth to which light can penetrate. In meters, how deep is the lake? Show your work below.

Name_______________________________Class __________________ Date __________________





CRITICAL THINKING

6. Making Inferences When bacteria decompose material in a pond, the oxygen in the water may be used up. So, fishes in the pond die. How might the absence of fish lead to a pond filling faster?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

7. Applying Concepts Imagine a steep, rocky stream. What kinds of adaptations might animals living in this stream have? Explain your answer.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________




Skills Worksheet

Chapter Review

USING KEY TERMS

1. In your own words, write a definition for the following terms: biome and tundra.

_______________________________________________________________

_______________________________________________________________


2. savanna and desert

_______________________________________________________________

_______________________________________________________________

3. open-water zone and deep-water zone

_______________________________________________________________

_______________________________________________________________

4. marsh and swamp

_______________________________________________________________

_______________________________________________________________


Multiple Choice

_____ 5. Trees that lose their leaves in the winter are called a. evergreen trees. c. deciduous trees. b. coniferous trees. d. None of the above

_____ 6. In which major ocean zone are plants and animals exposed to air for part of the day? a. intertidal zone c. oceanic zone b. neritic zone d. benthic zone

_____ 7. An abiotic factor that affects marine ecosystems is a. the temperature of the water. b. the depth of the water. c. the amount of sunlight that passes through the water. d. All of the above

Name_______________________________Class __________________ Date __________________





_____ 8. _____ is a marine ecosystem that includes mudflats, sandy beaches, and rocky shores. a. An intertidal area b. Polar ice c. A coral reef d. The Sargasso Sea

Short Answer

9. What are seven land biomes?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

10. Explain how a small lake can become a forest.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

11. Describe the three zones of a lake.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

12. How do rivers form?

_______________________________________________________________

_______________________________________________________________

13. What are three abiotic factors in land biomes? three abiotic factors in marine ecosystems? one abiotic factor in freshwater ecosystems?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





CRITICAL THINKING

14. Identifying Relationships Use a food web to demonstrate the interdependence among organisms within a forest biome.

15. Applying Concepts Use each of the following terms as subtitles for a poster showing the differences in ocean zones: intertidal zone, neritic zone, and oceanic zone.

Name_______________________________Class __________________ Date __________________





16. Concept Mapping Create a graphic organizer that illustrates how biotic and abiotic elements of a marine ecosystem interact.

17. Concept Mapping Use the following terms to create a concept map: plants and animals, tropical rain forest, tundra, biomes, permafrost, canopy, desert, and

abiotic factors.

Name_______________________________Class __________________ Date __________________





18. Making Inferences Plankton use photosynthesis to make their own food. They need sunlight for photosynthesis. Which of the four major ocean zones can support plankton growth? Explain your answer.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

19. Predicting Consequences Wetlands, such as marshes and swamps, play an important role in flood control. Wetlands also help replenish underground water supplies. Predict what might happen if a wetland dries out.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

20. Analyzing Ideas A scientist has a new hypothesis. He or she thinks that savannas and deserts are part of one biome rather than two separate biomes. Based on what you’ve learned, decide if the scientist’s hypothesis is correct. Explain your answer.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





21. Applying Concepts Imagine that you are a scientist. You are studying an area that gets about 100 cm of rain each year. The average summer temperatures are near 30ºC. What biome are you in? What are some plants and animals you will likely encounter?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________


Use the graphs below to answer the questions that follow.

Name_______________________________Class __________________ Date __________________





22. Which biome is most likely found in the region described by the graphs above? Explain your answer.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

23. How many centimeters of rain fell in the region during the course of the year?

_______________________________________________________________

_______________________________________________________________

24. Which month is the hottest in the region? the coolest in the region?

_______________________________________________________________

_______________________________________________________________

25. Suppose an engineer has developed a robot that can function in temperatures ranging from 12ºC to 32ºC. The engineer wants to use the robot year-round in the biome depicted by the graphs. What, if any, modifications will the engineer need to work on?

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________



Holt Science and Technology 53 The Movement of Ocean Water

Skills Worksheet

Section Review

Currents USING KEY TERMS

The statements below are false. For each statement, replace the underlined word

to make a true statement.

1. Deep currents are directly controlled by wind.

_______________________________________________________________

2. An increase in density in parts of the ocean can cause surface currents to form.

_______________________________________________________________

_______________________________________________________________


_____ 3. Surface currents a. are formed by wind. b. are streamlike movements of water. c. can travel across entire oceans. d. All of the above

4. List three factors that control surface currents.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

5. How does a continent affect the movement of a surface current?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

6. Explain how temperature and salinity affect the formation of deep currents.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





MATH SKILLS

7. The Gulf Stream flows along the North Carolina coast at 90 million cubic meters per second and at 40 million cubic meters per second when it turns eastward. How much faster is the Gulf Stream flowing along the coast than when it turns eastward? Show your work below.

CRITICAL THINKING

8. Evaluating Conclusions If there were no land on Earth’s surface, what would the pattern of surface currents look like? Explain your answer.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

9. Making Comparisons Compare the factors that contribute to the formation of surface currents and deep currents.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________




Skills Worksheet

Section Review

Currents and Climate USING KEY TERMS

1. Use each of the following terms in a separate sentence: upwelling, El Niño, and La Niña.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________


_____ 2. The Gulf Stream carries warm water to the North Atlantic Ocean, which contributes to a. a harsh winter in the British Isles. b. a cold-water surface current that flows to the British Isles. c. a mild climate for the British Isles. d. a warm-water surface current that flows along the coast of

California.

3. Why might the climate in Scotland be relatively mild even though the country is located at a high latitude?

_______________________________________________________________

_______________________________________________________________

4. How does technology help scientists predict when an El Niño is likely to occur?

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





MATH SKILLS

5. A fisher usually catches 540 kg of anchovies off the coast of Peru. During El Niño, the fisher caught 85% less fish. How many kilograms of fish did the fisher catch during El Niño? Show your work below.

CRITICAL THINKING

6. Applying Concepts Many marine organisms depend on upwelling to bring nutrients to the surface. How might El Niño affect a fisher’s way of life?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________




Skills Worksheet

Section Review

Waves USING KEY TERMS


1. whitecap and swell

_______________________________________________________________

_______________________________________________________________

2. undertow and longshore current

_______________________________________________________________

_______________________________________________________________

3. tsunami and storm surge

_______________________________________________________________

_______________________________________________________________


_____ 4. Longshore currents transport sediment a. to the open ocean. c. only during low tide. b. along the shore. d. only during high tide.

5. Where do deep-water waves become shallow-water waves?

_______________________________________________________________

_______________________________________________________________

6. Explain how water moves as waves travel through it.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

7. Name five events that can cause a tsunami.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





8. Describe the two parts of a wave.

_______________________________________________________________

_______________________________________________________________

MATH SKILLS

9. A barrier island is 1 km wide and 10 km long. If erosion by a longshore current causes the island to lose 1.5 m of its width per year, how long will it take for the island to lose one-fourth of its width? Show your work below.

CRITICAL THINKING

10. Analyzing Processes How would you explain a bottle moving across the water in the same direction that the waves are traveling? Make a drawing of the bottle’s movement.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





11. Analyzing Processes Describe the motion of a wave as it approaches the shore.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

12. Applying Concepts Explain how energy plays a role in causing ocean waves.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

13. Making Comparisons How does the formation of an undertow differ from the formation of a longshore current? How is sand on the beach affected by each?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________




Skills Worksheet

Chapter Review

USING KEY TERMS


1. surface current and deep current

_______________________________________________________________

_______________________________________________________________

2. El Niño and La Niña

_______________________________________________________________

_______________________________________________________________

3. Coriolis effect and continental deflections

_______________________________________________________________

_______________________________________________________________

4. crest and trough

_______________________________________________________________

_______________________________________________________________


Multiple Choice

_____ 5. Deep currents form when a. cold air decreases water density. b. warm air increases water density. c. the ocean surface freezes and solids from the water underneath are

removed. d. salinity increases.

_____ 6. When waves come near the shore, a. they speed up. c. their wavelength increases. b. they maintain their speed. d. their wave height increases.

_____ 7. Whitecaps break a. in the surf. c. in the open ocean. b. in the breaker zone. d. as their wavelength increases.

Name_______________________________Class __________________ Date __________________





_____ 8. To determine wave period, scientists measure a. from one wave crest to the next wave trough. b. from one wave trough to the next wave crest. c. from one wave crest to the next wave crest. d. from one wave trough to the next wave trough.

_____ 9. Surface currents are NOT controlled by a. the Coriolis effect. b. water density. c. global winds. d. continental deflections.

_____ 10. El Niño can cause a. droughts to occur in Indonesia and Australia. b. upwelling to occur off the coast of South America. c. earthquakes. d. droughts to occur in the southern half of the United States.

Short Answer

11. Explain the relationship between upwelling and El Niño.

_______________________________________________________________

_______________________________________________________________

12. Describe the two parts of a wave. Describe how these two parts relate to wavelength and wave height.

_______________________________________________________________

_______________________________________________________________

13. Describe how warm-water currents affect the climate in the British Isles.

_______________________________________________________________

_______________________________________________________________

14. Describe the factors that form deep currents.

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





CRITICAL THINKING

15. Concept Mapping Use the following terms to create a concept map: wind, deep currents, sun’s energy, types of ocean-water movement, surface currents,

increasing water density, and waves.

Name_______________________________Class __________________ Date __________________





Use the table below to answer Question 16.

16. Interpreting Relationships Use the table to decide which area of water will have deeper currents. Explain the cause and effect relationship that salinity and water temperature have on deep currents.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

17. Identifying Relationships Describe how global winds, the Coriolis effect, and continental deflections form a pattern of surface currents on Earth.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Area of Ocean Salinity Temperature

A High Low

B Low High

Name_______________________________Class __________________ Date __________________






The diagram shows some major surface currents that flow in the Western

Hemisphere. Use the diagram to answer questions 18 and 19.

18. List two warm-water currents and two cold-water currents.

_______________________________________________________________

_______________________________________________________________

19. How do you think the Labrador Current affects the climate of Canada and Greenland?

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





CHALLENGE

20. Design and conduct an investigation to show how ocean currents are associated with energy from the sun. As you design your investigation, answer the following questions: What is your control, and what are your variables? What materials and tools will you use to collect the data? What is the best way to present and explain the results of your investigation? What cause and effect relationships are shown by your data? Review your experimental design for possibilities of further investigation.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Use the table below to answer Question 21.

21. Interpreting Relationships The average ocean temperature is 22º C. The average two-month’s rainfall over land near the ocean is 4.2 inches. How does the data in the table above demonstrate the relationship between ocean temperature and weather in nearby landmasses?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Year 1983 1985 1997 2000

Ocean

Temperature 25.5 22 26.5 22

Rainfall (in.) 6.6 4.2 7.2 4.2

Name_______________________________Class __________________ Date __________________



Holt Science and Technology 66 The Atmosphere

Skills Worksheet

Section Review

Characteristics of the Atmosphere

USING KEY TERMS

1. Use each of the following terms in a separate sentence: air pressure, atmosphere, troposphere, stratosphere, mesosphere, and thermosphere.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________


_____ 2. Why does the temperature of different layers of the atmosphere vary? a. because air temperature increases as altitude increases b. because the amount of energy radiated from the sun varies c. because of interference by humans d. because of the composition of gases in each layer

3. Why does air pressure decrease as altitude increases?

_______________________________________________________________

_______________________________________________________________

4. How can the thermosphere have high temperatures but not feel hot?

_______________________________________________________________

_______________________________________________________________

5. What determines the temperature of atmospheric layers?

_______________________________________________________________

_______________________________________________________________

6. What two gases make up most of the atmosphere?

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





MATH SKILLS

7. If an average cloud has a density of 0.5 g/m3 and has a volume of 1,000,000,000 m3, what is the weight of an average cloud? Show your work below.

CRITICAL THINKING

8. Applying Concepts Apply what you know about the relationship between altitude and air pressure to explain why rescue helicopters have a difficult time flying at altitudes over 6,000 m.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

9. Applying Concepts Space vehicles heat up when they enter the atmosphere. Explain what causes this phenomenon.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

10. Making Inferences Explain why gases such as helium can escape Earth’s atmosphere.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________




Skills Worksheet

Section Review

Atmospheric Heating USING KEY TERMS

1. Use each of the following terms in a separate sentence: thermal conduction,

radiation, convection, greenhouse effect, and global warming.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________


_____ 2. Which of the following is the best example of conduction? a. a light bulb warming a lampshade b. an egg cooking in a frying pan c. water boiling in a pot d. gases circulating in the atmosphere

3. Describe three ways that energy is transferred in the atmosphere.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

4. What is the difference between the greenhouse effect and global warming?

_______________________________________________________________

_______________________________________________________________

5. What is the radiation balance?

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





MATH SKILLS

6. Find the average of the following temperatures: 22.9 oC, 21.7 oC, 12.6 oC, 18.6 oC, 25.7 oC, 27.7 oC, and 27.8 oC.. Show your work below.

CRITICAL THINKING

7. Identifying Relationships How does the process of convection rely on radiation?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

CHALLENGE

8. Design and conduct an investigation to determine how the sun drives atmospheric convection. Share your design with your teacher before conducting your investigation.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________




Skills Worksheet

Section Review

Global Winds and Local Winds USING KEY TERMS

1. In your own words, write a definition for each of the following terms: wind,

Coriolis effect, jet stream, polar easterlies, westerlies, and trade winds.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________


_____ 2. Why does warm air rise and cold air sink? a. because warm air is less dense than cold air b. because warm air is denser than cold air c. because cold air is less dense than warm air d. because warm air has less pressure than cold air does

3. What are pressure belts?

_______________________________________________________________

_______________________________________________________________

4. What causes winds?

_______________________________________________________________

_______________________________________________________________

5. How does the Coriolis effect affect wind movement?

_______________________________________________________________

_______________________________________________________________

6. How are sea and land breezes similar to mountain and valley breezes?

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





7. Would there be winds if the Earth’s surface were the same temperature everywhere? Explain your answer.

_______________________________________________________________

_______________________________________________________________

MATH SKILLS

8. Flying an airplane at 500 km/h, an airplane pilot plans to reach her destination in 5 h. But she finds a jet stream moving 250 km/h in the direction she is traveling. If she gets a boost from the jet stream for 2 h, how long will the flight last? Show your work below.

CRITICAL THINKING

9. Making Inferences How does the sun’s energy cause the wind?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

10. Applying Concepts Imagine you are near an ocean in the daytime. You want to go to the ocean, but you don’t know how to get there. How might a local wind help you find the ocean?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________




Skills Worksheet

Section Review

Air Pollution USING KEY TERMS

The statements below are false. For each statement, replace the underlined term to

make a true statement.

1. Air pollution is a sudden change in the acidity of a stream or lake.

_______________________________________________________________

_______________________________________________________________

2. Smog is rain, sleet, or snow that has a high concentration of acid.

_______________________________________________________________

_______________________________________________________________


_____ 3. Which of the following statements describes the formation of smog? a. Acids in the air react with ozone. b. Ozone reacts with vehicle exhaust. c. Vehicle exhaust reacts with sunlight and ozone. d. Water vapor reacts with sunlight and ozone.

4. What is the difference between primary and secondary pollutants?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

5. Describe five sources of indoor air pollution. Is all indoor air pollution caused by humans? Explain.

_______________________________________________________________

_______________________________________________________________

6. What is the ozone hole, and why does it form?

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





7. Describe five effects of air pollution on human health. How can air pollution be reduced?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

CRITICAL THINKING

8. Expressing Opinions How do you think that nations should resolve air-pollution problems that cross national boundaries?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

9. Making Inferences Why might establishing a direct link between air pollution and health problems be difficult?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________






The map below shows the pH of precipitation measured at field stations in the northeastern U.S. On the pH scale, lower numbers indicate solutions that are more acidic than solutions with higher numbers. Use the map to answer the questions below.

10. Which areas have the most acid precipitation? Hypothesize why.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

11. Boston is a larger city than Buffalo is, but the precipitation in Buffalo is more acidic than the precipitation in Boston. Explain why.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________




Skills Worksheet

Chapter Review

USING KEY TERMS


1. air pressure and wind

_______________________________________________________________

2. troposphere and thermosphere

_______________________________________________________________

3. greenhouse effect and global warming

_______________________________________________________________

4. convection and thermal conduction

_______________________________________________________________

5. global wind and local wind

_______________________________________________________________

6. stratosphere and mesosphere

_______________________________________________________________


Multiple Choice

_____ 7. What is the most abundant gas in the atmosphere? a. oxygen c. nitrogen b. hydrogen d. carbon dioxide

_____ 8. A major source of oxygen for the Earth’s atmosphere is a. sea water. c. plants. b. the sun. d. animals.

_____ 9. The bottom layer of the atmosphere, where almost all weather occurs, is the a. stratosphere. c. thermosphere. b. troposphere. d. mesosphere.

_____ 10. What percentage of the solar energy that reaches the outer atmosphere is absorbed at the Earth’s surface? a. 20% c. 50% b. 30% d. 70%

Name_______________________________Class __________________ Date __________________





_____ 11. The ozone layer is located in the a. stratosphere. c. thermosphere. b. troposphere. d. mesosphere.

_____ 12. By which method does most thermal energy in the atmosphere circulate? a. conduction c. advection b. convection d. radiation

_____ 13. The balance between incoming and outgoing energy is called a. the convection balance. c. the greenhouse effect. b. the conduction balance. d. the radiation balance.

_____ 14. In which wind belt is most of the United States located? a. westerlies c. southeast trade winds b. northeast trade winds d. doldrums

_____ 15. Which of the following pollutants is NOT a primary pollutant? a. car exhaust c. smoke from a factory b. acid precipitation d. fumes from burning plastic

_____ 16. How does the Clean Air Act respond to social, political, and economic needs? a. It controls the amount of air pollutants that can be released from

many sources. b. It requires cars to run on fuels other than gasoline. c. It requires many industries to use scrubbers. d. Both (a) and (c)

Name_______________________________Class __________________ Date __________________





Short Answer

17. Why does the atmosphere become less dense as altitude increases?

_______________________________________________________________

_______________________________________________________________

18. Design an experiment that would investigate why air rises when it is heated. Include a control and appropriate variables.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

19. Describe how convection currents produce wind.

_______________________________________________________________

_______________________________________________________________

20. What are secondary pollutants, and how do they form? Give an example of a secondary pollutant.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





CRITICAL THINKING

21. Concept Mapping Use the following terms to create a concept map: mesosphere, stratosphere, layers, temperature, troposphere, atmosphere.

Name_______________________________Class __________________ Date __________________





22.Identifying Relationships What is the relationship between the greenhouse effect and global warming?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

23.Applying Concepts How do you think the Coriolis effect would change if the Earth rotated twice as fast as it does? Explain.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

24. Making Inferences An investigation of the atmosphere of Venus shows that it has a very high level of carbon dioxide. How could you explain the effect of the carbon dioxide level on the greenhouse effect on Venus?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________






Use the diagram below to answer the questions that follow. When answering the

questions that follow, assume that ocean currents do not affect the path of the

boats.

25. If Boat A traveled to 50ºN, from which direction would the prevailing wind blow?

_______________________________________________________________

26. If Boat B sailed with the prevailing westerlies in the Northern Hemisphere, in which direction would the boat be traveling?

_______________________________________________________________

CHALLENGE

27. Design an experiment to investigate differences in the amount of the sun’s energy absorbed by a variety of surface materials.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________



Holt Science and Technology 81 Understanding Weather

Skills Worksheet

Section Review

Water in the Air USING KEY TERMS

1. In your own words, write a definition for each of the following terms: relative

humidity, condensation, cloud, and precipitation.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________


_____ 2. Which of the following clouds is most likely to produce light to heavy, continuous rain? a. cumulus cloud b. cumulonimbus cloud c. nimbostratus cloud d. cirrus cloud

3. Name a tool that can help you determine relative humidity.

_______________________________________________________________

_______________________________________________________________

4. What does a relative humidity of 75% mean?

_______________________________________________________________

_______________________________________________________________

5. Describe the path of water through the water cycle.

_______________________________________________________________

_______________________________________________________________

6. What are four types of precipitation?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





CRITICAL THINKING

7. Applying Concepts Why are some clouds formed from water droplets, while others are made up of ice crystals?

_______________________________________________________________

_______________________________________________________________

8. Applying Concepts How can rain and hail fall from the same cumulonimbus cloud?

_______________________________________________________________

_______________________________________________________________

9. Identifying Relationships What happens to relative humidity as the air temperature drops below the dew point?

_______________________________________________________________

_______________________________________________________________


Use the image in your textbook on the Section Review page to answer the

following questions.

10. What type of cloud is shown in the image?

_______________________________________________________________

11. How is this type of cloud formed?

_______________________________________________________________

_______________________________________________________________

12. What type of weather can you expect when you see this type of cloud? Explain.

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________




Skills Worksheet

Section Review

Air Masses and Fronts USING KEY TERMS


1. front and air mass

_______________________________________________________________

_______________________________________________________________

2. cyclone and anticyclone

_______________________________________________________________

_______________________________________________________________


_____ 3. What kind of front forms when a cold air mass displaces a warm air mass? a. a cold front c. an occluded front b. a warm front d. a stationary front

4. What are the major air masses that influence the weather in the United States?

_______________________________________________________________

_______________________________________________________________

5. What is one source region of a maritime polar air mass?

_______________________________________________________________

_______________________________________________________________

6. What are the characteristics of an air mass whose two-letter symbol is cP?

_______________________________________________________________

_______________________________________________________________

7. What are the four major types of fronts?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





8. How do fronts cause weather changes?

_______________________________________________________________

_______________________________________________________________

9. How do cyclones and anticyclones affect the weather?

_______________________________________________________________

_______________________________________________________________

MATH SKILLS

10. A cold front is moving toward the town of La Porte at 35 km/h. The front is 200 km away from La Porte. How long will it take for the front to get to La Porte? Show your work below.

CRITICAL THINKING

11. Applying Concepts How do air masses that form over the land and ocean affect weather in the United States?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

12. Applying Concepts Meteorological data suggests that a warm front is forming. What sort of weather might be predicted?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

13. Applying Concepts Which air masses influence the weather where you live? Explain.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________




Skills Worksheet

Section Review

Severe Weather USING KEY TERMS


word bank.

hurricane storm surge

tornado lightning

1. Thunderstorms are very active electrically and often cause

______________________.

2. A ______________________ forms when a funnel cloud pokes through the

bottom of a cumulonimbus cloud and makes contact with the ground.


_____ 3. The safest thing to do if you are caught outdoors during a tornado is to a. stay near buildings and roads. b. head for an open area. c. seek shelter near a large tree. d. None of the above

4. Describe how tornadoes form.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

5. At what latitudes do hurricanes usually form?

_______________________________________________________________

_______________________________________________________________

6. What is lightning? What happens when lightning strikes?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





CRITICAL THINKING

7. Applying Concepts What items do you think you would need in a disaster kit? Explain.

_______________________________________________________________

_______________________________________________________________

8. Identifying Relationships What happens to a hurricane as it moves over land? Explain.

_______________________________________________________________

_______________________________________________________________


Use the diagram in your textbook for this Section Review to answer the following

questions.

9. Describe what is happening at point C.

_______________________________________________________________

_______________________________________________________________

10. What is point B?

_______________________________________________________________

_______________________________________________________________

11. What kind of weather can you expect at point A?

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________




Skills Worksheet

Section Review

Forecasting the Weather USING KEY TERMS

1. In your own words, write a definition for each of the following terms: thermometer, barometer, and anemometer.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________


_____ 2. Which of the following instruments measures air pressure? a. thermometer b. barometer c. anemometer d. windsock

3. How does radar help meteorologists forecast the weather?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

4. How can weather satellites help us predict the weather?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





MATH SKILLS

5. If it is 75°F outside, what is the temperature in degrees Celsius?

(Hint: °F = (°C 9/ 5) + 32) Show your work below.

CRITICAL THINKING

6. Applying Concepts Why would a meteorologist compare a new weather map with one that is 24 h old?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

7. Making Inferences In the United States, why is weather data gathered from a large number of station models?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

8. Making Inferences How might several station models from different regions plotted on a map help a meteorologist?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________




Skills Worksheet

Chapter Review

USING KEY TERMS


1. relative humidity and dew point

_______________________________________________________________

_______________________________________________________________

2. condensation and precipitation

_______________________________________________________________

_______________________________________________________________

3. air mass and front

_______________________________________________________________

_______________________________________________________________

4. lightning and thunder

_______________________________________________________________

_______________________________________________________________

5. tornado and hurricane

_______________________________________________________________

_______________________________________________________________

6. barometer and anemometer

_______________________________________________________________

_______________________________________________________________


Multiple Choice

_____ 7. The process in which water changes from a liquid to gas is called a. precipitation. c. evaporation. b. condensation. d. water vapor.

_____ 8. What is the relative humidity of air at its dew point? a. 0% c. 75% b. 50% d. 100%

Name_______________________________Class __________________ Date __________________





_____ 9. Which of the following is NOT a type of condensation? a. fog c. snow b. cloud d. dew

_____ 10. High clouds made of ice crystals are called _____ clouds. a. stratus c. nimbostratus b. cumulus d. cirrus

_____ 11. Large thunderhead clouds that produce precipitation are called _____ clouds. a. nimbostratus c. cumulus b. cumulonimbus d. stratus

_____ 12. Strong updrafts within a thunderhead can produce a. snow. c. sleet. b. rain. d. hail.

_____ 13. A maritime tropical air mass contains a. warm, wet air. c. warm, dry air. b. cold, moist air. d. cold, dry air.

_____ 14. A front that forms when a warm air mass is trapped between cold air masses and is forced to rise is a(n) a. stationary front. c. occluded front. b. warm front. d. cold front.

_____ 15. A severe storm that forms as a rapidly rotating funnel cloud is called a a. hurricane. c. typhoon. b. tornado. d. thunderstorm.

_____ 16. The lines connecting points of equal air pressure on a weather map are called a. contour lines. c. isobars. b. highs. d. lows.

Short Answer

17. Explain the relationship between condensation and dew point.

_______________________________________________________________

_______________________________________________________________

18. Describe the conditions along a stationary front.

_______________________________________________________________

_______________________________________________________________

__________________________________________________________________________

Name_______________________________Class __________________ Date __________________





19. What are the characteristics of an air mass that forms over the Gulf of Mexico?

_______________________________________________________________

_______________________________________________________________

20. Explain how a hurricane forms.

_______________________________________________________________

_______________________________________________________________

21. Describe the water cycle, and explain how it affects weather.

_______________________________________________________________

_______________________________________________________________

22. List the major similarities and differences between hurricanes and tornadoes.

_______________________________________________________________

_______________________________________________________________

23. Explain how a tornado forms.

_______________________________________________________________

_______________________________________________________________

24. Describe an interaction between weather and ocean systems.

_______________________________________________________________

_______________________________________________________________

25. What is a station model? What types of information do station models provide?

_______________________________________________________________

_______________________________________________________________

26. What type of technology is used to locate and measure the amount of precipitation in an area?

_______________________________________________________________

27. List two ways to keep yourself informed during severe weather.

_______________________________________________________________

_______________________________________________________________

28. Explain why staying away from floodwater is important even when the water is shallow.

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





CRITICAL THINKING

29. Concept Mapping Use the following terms to create a concept map: evaporation, relative humidity, water vapor, dew, psychrometer, clouds, and fog.

30. Making Inferences If both the air temperature and the amount of water vapor in the air change, is it possible for the relative humidity to stay the same? Explain.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

31. Applying Concepts What can you assume about the amount of water vapor in the air if there is no difference between the wet- and dry-bulb readings of a psychrometer?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





32. Identifying Relationships Explain why the concept of relative humidity is important to understanding weather.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________


Use the weather map below to answer the questions that follow.

33. Where are thunderstorms most likely to occur? Explain your answer.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

34. What are the weather conditions in Nashville, Tennessee? Explain your answer.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________



Holt Science and Technology 94 Stars, Galaxies, and the Universe

Skills Worksheet

Section Review

Stars USING KEY TERMS

1. Use the following terms in the same sentence: apparent magnitude and absolute magnitude.

_______________________________________________________________

_______________________________________________________________

2. Use each of the following terms in a separate sentence: spectrum, light-year, and parallax.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________


_____ 3. When you look at white light through a glass prism, you see a rainbow of colors called a a. spectrograph. b. spectrum. c. parallax. d. light-year.

_____ 4. Class F stars are a. blue. b. yellow. c. yellow-white. d. red.

5. Describe how scientists classify stars.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

6. Identify and explain the technique used to determine the composition of a star.

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





CRITICAL THINKING

7. Drawing Conclusions If a certain star displayed a large parallax, what could you conclude about the star’s distance from Earth?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

8. Making Comparisons Explain how color is related to the temperature of a star.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

9. Making Comparisons Compare apparent motion with actual motion.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________


10. Look at the two figures below. How many hours passed between the first image and the second image? Explain your answer.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________




Skills Worksheet

Section Review

The Life Cycle of Stars USING KEY TERMS


1. white dwarf and red giant

_______________________________________________________________

_______________________________________________________________

2. supernova and neutron star

_______________________________________________________________

_______________________________________________________________

3. pulsar and black hole

_______________________________________________________________

_______________________________________________________________


_____ 4. The sun is a a. white dwarf. c. red giant. b. main-sequence star. d. red dwarf.

_____ 5. A star begins as a ball of gas and dust pulled together by a. black holes. c. heavy metals. b. electrons and protons. d. gravity.

6. Are blue stars young or old? How can you tell?

_______________________________________________________________

_______________________________________________________________

7. In main-sequence stars, what is the relationship between brightness and temperature?

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





8. Arrange the following stages in order of their appearance in the life cycle of a star: white dwarf, red giant, and main-sequence star. Explain your answer.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

MATH SKILLS

9. The sun’s present radius is 700,000 km. If the sun’s radius increased by 150 times, what would its radius be? Show your work below.

CRITICAL THINKING

10. Applying Concepts Given that there are more low-mass stars than high-mass stars in the universe, do you think there are more white dwarfs or more black holes in the universe? Explain.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

11. Analyzing Processes Describe what might happen to a star after it becomes a supernova.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

12. Evaluating Data How does the H-R diagram explain the life cycle of a star?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________




Skills Worksheet

Section Review

Galaxies USING KEY TERMS

1. Use the following terms in the same sentence: nebula, globular cluster, and open cluster.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________


2. Arrange the following galaxies in order of decreasing size: spiral, giant elliptical, dwarf elliptical, and irregular.

_______________________________________________________________

_______________________________________________________________

_____ 3. All of the following are shapes used to classify galaxies EXCEPT a. elliptical. b. irregular. c. spiral. d. triangular.

CRITICAL THINKING

4. Making Comparisons Describe the difference between an elliptical galaxy and a globular cluster.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

5. Identifying Relationships Explain how looking through a telescope is like looking back in time.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





MATH SKILLS

6. The quasar known as PKS 0637-752 is 6 billion light-years away from Earth. The North Star is 431 light-years away from Earth. What is the ratio of the distances in kilometers between these two celestial objects from Earth? (Hint: One light-year is equal to 9.46 trillion kilometers.) Show your work below.

Name_______________________________Class __________________ Date __________________




Skills Worksheet

Section Review

Formation of the Universe USING KEY TERMS

1. In your own words, write a definition for the following terms: cosmology and big bang theory.

_______________________________________________________________

_______________________________________________________________


2. Describe two ways scientists calculate the age of the universe.

_______________________________________________________________

_______________________________________________________________

_____ 3. The expansion of the universe can be compared to a. cosmology. b. raisin bread baking in an oven. c. thermal energy leaving an oven as the oven cools. d. bread pudding.

4. How is cosmic background radiation evidence of the big bang?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

5. What do scientists think will eventually happen to the universe?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





MATH SKILLS

6. The North Star is 4.08 1012 km from Earth. What is this number written in its

long form? Show your work below.

CRITICAL THINKING

7. Applying Concepts Explain how every object in the universe is part of a larger system.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

8. Analyzing Ideas Explain why scientists think that the universe will expand forever.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________




Skills Worksheet

Chapter Review

USING KEY TERMS



1. The distance that light travels in space in 1 year is called apparent magnitude.

2. Globular clusters are groups of stars that are usually located along the spiral disk of a galaxy.

3. Galaxies that have very bright centers and very little dust and gas are called spiral galaxies.

4. When you look at white light through a glass prism, you see a rainbow of colors called a supernova.


Multiple Choice

_____ 5. A scientist can identify a star’s composition by looking at a. the star’s prism. b. the star’s continuous spectrum. c. the star’s absorption spectrum. d. the star’s color.

_____ 6. If the universe expands forever, a. the universe will collapse. b. the universe will repeat itself. c. the universe will remain just as it is today. d. stars will age and die and the universe will become cold and dark.

_____ 7. The majority of stars in our galaxy are a. blue stars. c. main-sequence stars. b. white dwarfs. d. red giants.

_____ 8. Which of the following is used to measure the distance between objects in space? a. parallax c. zenith b. magnitude d. altitude

_____ 9. Which of the following stars would be seen as the brightest star? a. Alcyone, which has an apparent magnitude of 3 b. Alpheratz, which has an apparent magnitude of 2 c. Deneb, which has an apparent magnitude of 1 d. Rigel, which has an apparent magnitude of 0

Name_______________________________Class __________________ Date __________________





Short Answer

10. Describe how scientists classify stars.

_______________________________________________________________

_______________________________________________________________

11. Describe the structure of the universe.

_______________________________________________________________

_______________________________________________________________

12. Explain how stars at different stages in their life cycle appear on the H-R diagram.

_______________________________________________________________

_______________________________________________________________

13. Explain the difference between the apparent motion and actual motion of stars.

_______________________________________________________________

_______________________________________________________________

14. Describe how color indicates the temperature of a star.

_______________________________________________________________

_______________________________________________________________

15. Describe two ways that scientists calculate the age of the universe.

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





CRITICAL THINKING

16. Concept Mapping Use the following terms to create a concept map: main sequence, star, nebula, red giant, white dwarf, neutron star, and

black hole

Name_______________________________Class __________________ Date __________________





17. Evaluating Conclusions While looking through a telescope, you see a galaxy that doesn’t appear to contain any blue stars. What kind of galaxy is it most likely to be? Explain your answer.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

18. Making Comparisons Explain the differences between main-sequence stars, giant stars, super giant stars, and white dwarfs.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

19. Evaluating Data Why do astronomers use absolute magnitudes to plot stars? Why don’t astronomers use apparent magnitudes to plot stars?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

20. Evaluating Sources According to the big bang theory, how did the universe begin? What evidence supports this theory?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

21. Evaluating Data If a certain star displayed a large parallax, what could you say about the star’s distance from Earth?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________






The graph below shows Hubble’s law, which relates how far galaxies are from

Earth and how fast they are moving away from Earth. Use the graph below to

answer the questions that follow.

22. Look at the point that represents galaxy A in the graph. How far is galaxy A from Earth, and how fast is it moving away from Earth?

_______________________________________________________________

_______________________________________________________________

23. If a galaxy is moving away from Earth at 15,000 km/s, how far is the galaxy from Earth?

_______________________________________________________________

_______________________________________________________________

24. If a galaxy is 90,000,000 light-years from Earth, how fast is it moving away from Earth?

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________



Holt Science and Technology 107 A Family of Planets

Skills Worksheet

Section Review

Our Solar System USING KEY TERMS

1. In your own words, write a definition for the term astronomical unit.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________


_____ 2. When was the planet Uranus discovered? a. before the 17th century b. in the 18th century c. in the 19th century d. in the 20th century

3. The invention of what instrument helped early scientists discover more bodies in the solar system?

_______________________________________________________________

_______________________________________________________________

4. List the four outer planets in increasing order of their distance from Earth’s orbit.

_______________________________________________________________

_______________________________________________________________

5. Describe how the inner planets are different from the outer planets.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

MATH SKILLS

6. If Venus is 6.0 light-minutes from the sun, what is Venus’s distance from the sun in astronomical units? Show your work below.

Name_______________________________Class __________________ Date __________________





CRITICAL THINKING

7. Analyzing Methods The distance between Earth and the sun is measured in light-minutes, but the distance between Neptune and the sun is measured in light-hours. Explain why.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________




Skills Worksheet

Section Review

The Inner Planets USING KEY TERMS

1. In your own words, write a definition for the term terrestrial planet.

_______________________________________________________________

_______________________________________________________________

For the pair of terms below, explain how the meanings of the terms differ.

2. prograde rotation and retrograde rotation

_______________________________________________________________

_______________________________________________________________


_____ 3. Scientists believe that the water on Mars now exists as a. polar icecaps. b. dry riverbeds. c. ice beneath the Martian soil. d. Both (a) and (c)

4. List three differences between and three similarities of Venus and Earth.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

5. What is the difference between a planet’s period of rotation and its period of revolution?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

6. What are some of the characteristics of Earth that make it suitable for life?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





7. Explain why the surface temperature of Venus is higher than the surface temperatures of the other planets in our solar system.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

MATH SKILLS

8. Mercury has a period of rotation equal to 58.67 Earth days. Mercury’s period of revolution is equal to 88 Earth days. How many times does Mercury rotate during one revolution around the sun? Show your work below.

CRITICAL THINKING

9. Making Inferences What type of information can we get by studying Earth from space?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

10. Analyzing Ideas What type of evidence found on Mars suggests that Mars may have been a warmer place and had a thicker atmosphere?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________




Skills Worksheet

Section Review

The Outer Planets USING KEY TERMS

1. In your own words, write a definition for the term gas giant.

_______________________________________________________________

_______________________________________________________________


_____ 2. The many colors of Jupiter’s atmosphere are probably caused by _____ in the atmosphere. a. clouds of water b. methane c. ammonia d. organic compounds

3. Why do scientists claim that Saturn, in a way, is still forming?

_______________________________________________________________

_______________________________________________________________

4. Why does Uranus have a blue green color?

_______________________________________________________________

_______________________________________________________________

5. What is unusual about Pluto’s moon, Charon?

_______________________________________________________________

_______________________________________________________________

6. What is the Great Red Spot?

_______________________________________________________________

_______________________________________________________________

7. Explain why Jupiter radiates more energy into space than it receives from the sun.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





8. How do the gas giants differ from the terrestrial planets?

_______________________________________________________________

_______________________________________________________________

9. What is so unusual about Uranus’s axis of rotation?

_______________________________________________________________

_______________________________________________________________

MATH SKILLS

10. Pluto is 5.5 light-hours from the sun. How far is Pluto from the sun in astronomical units? (Hint: 1 AU = 8.3 light-minutes) Show your work below.

11. If Jupiter is 43.3 light-minutes from the sun and Neptune is 4.2 light-hours from the sun, how far from Jupiter is Neptune? Show your work below.

CRITICAL THINKING

12. Evaluating Data What conclusions can you draw about the properties of a planet just by knowing how far it is from the sun?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

13. Applying Concepts Why isn’t the word surface included in the statistics for the gas giants?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________




Skills Worksheet

Section Review

Moons USING KEY TERMS

1. In your own words, write a definition for the term satellite.

_______________________________________________________________

_______________________________________________________________


_____ 2. All major planets in the solar system have natural satellites except a. Venus and Mars. b. Venus and Mercury. c. Mercury and Uranus. d. Mercury and Pluto.

_____ 3. Which of the following is a Galilean satellite? a. Phobos b. Deimos c. Ganymede d. Charon

4. Describe the current theory for the origin of Earth’s moon.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

5. What features of the Martian moons suggest that they are bodies captured by Mars’s gravity?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

6. In what ways does Neptune’s moon Triton differ from the other large moons that orbit the gas giants?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





CRITICAL THINKING

7. Analyzing Methods How can astronomers use the age of a lunar rock to estimate the age of the surface of a planet such as Mercury?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

8. Identifying Relationships Charon stays in the same place in Pluto’s sky, but the moon moves across Earth’s sky. What causes this difference?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________


Use the bar graph below to answer the questions that follow.

9. Forty-seven of the outermost satellites of Jupiter have diameters of less than 10 km. Their distances and orbital directions are shown in the bar graph. From the information in the graph, how many of the smallest moons have prograde orbits?

_______________________________________________________________

10. From the information in the bar graph, how many of the smallest moons lie between 21 and 22 million km from Jupiter?

_______________________________________________________________

_______________________________________________________________

11. From the information in the bar graph, what can you infer about the origins of these moons?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________




Skills Worksheet

Section Review

Small Bodies in the Solar System USING KEY TERMS


1. comet and asteroid

_______________________________________________________________

_______________________________________________________________

2. meteor and meteorite

_______________________________________________________________

_______________________________________________________________


_____ 3. Which of the following is NOT a type of meteorite? a. stony meteorite b. rocky-iron meteorite c. stony-iron meteorite d. metallic meteorite

4. Why is the study of comets, asteroids, and meteoroids important in understanding the formation of the solar system?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

5. Why do a comet’s two tails often point in different directions?

_______________________________________________________________

_______________________________________________________________

6. How can a cosmic impact affect life on Earth?

_______________________________________________________________

_______________________________________________________________

7. What is the difference between an asteroid and a meteoroid?

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





8. Where is the asteroid belt located?

_______________________________________________________________

_______________________________________________________________

9. What is the Torino scale?

_______________________________________________________________

_______________________________________________________________

10. Describe why we see several impact craters on the moon but few on Earth.

_______________________________________________________________

_______________________________________________________________

MATH SKILLS

11. The diameter of comet A’s nucleus is 55 km. If the diameter of comet B’s nucleus is 30% larger than comet A’s nucleus, what is the diameter of comet B’s nucleus? Show your work below.

CRITICAL THINKING

12. Expressing Opinions Do you think the government should spend money on programs to search for asteroids and comets that have Earth-crossing orbits? Explain.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

13. Making Inferences What is the likelihood that scientists will discover an object belonging in the red category of the Torino scale in the next 500 years? Explain your answer.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________




Skills Worksheet

Chapter Review

USING KEY TERMS


1. terrestrial planet and gas giant

_______________________________________________________________

_______________________________________________________________

2. asteroid and comet

_______________________________________________________________

_______________________________________________________________

3. meteor and meteorite

_______________________________________________________________

_______________________________________________________________


word bank.

astronomical unit meteorite meteoroid

prograde retrograde satellite

4. The average distance between the sun and Earth is 1

______________________.

5. A small rock in space is called a(n) ______________________.

6. When viewed from above its north pole, a body that moves in a counter-

clockwise direction is said to have ______________________ rotation.

7. A(n) ______________________ is a natural or artificial body that revolves

around a planet.


Multiple Choice

_____ 8. Of the following, which is the largest body? a. the moon c. Mercury b. Pluto d. Ganymede

Name_______________________________Class __________________ Date __________________





_____ 9. Which of the following planets have retrograde rotation? a. the terrestrial planets b. the gas giants c. Mercury and Venus d. Venus and Uranus

_____ 10. Which of the following planets does NOT have any moons? a. Mercury b. Mars c. Uranus d. None of the above

_____ 11. Why can liquid water NOT exist on the surface of Mars? a. The temperature is too high. b. Liquid water once existed there. c. The gravity of Mars is too weak. d. The atmospheric pressure is too low.

Short Answer

12. List the names of the planets in the order the planets orbit the sun.

_______________________________________________________________

_______________________________________________________________

13. Describe three ways in which the inner planets are different from the outer planets.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

14. What are the gas giants? How are the gas giants different from the terrestrial planets?

_______________________________________________________________

_______________________________________________________________

15. What is the difference between asteroids and meteoroids?

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





16. What is the difference between a planet’s period of rotation and period of revolution?

_______________________________________________________________

_______________________________________________________________

17. What gases are the major components of Uranus and Neptune?

_______________________________________________________________

_______________________________________________________________

18. Which characteristics of Earth make it suitable for life?

_______________________________________________________________

_______________________________________________________________

19. Why do scientists think that Miranda, a moon of Uranus, was once broken apart by a collision with another large body?

_______________________________________________________________

_______________________________________________________________

20. What two bodies in the solar system have been reclassified as dwarf planets?

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





CRITICAL THINKING

21. Concept Mapping Use the following terms to create a concept map: solar system, terrestrial planets, gas giants, moons, comets, asteroids, and

meteoroids.

Name_______________________________Class __________________ Date __________________





22. Applying Concepts Even though we haven’t yet retrieved any rock samples from Mercury’s surface for radiometric dating, scientists know that the surface of Mercury is much older than that of Earth. How do scientists know this?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

23. Making Inferences Where in the solar system might scientists search for life, and why?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

24. Making Inferences Jupiter’s moon Io is the most volcanically active body in the solar system. What might you infer about the surface of Io?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

25. Predicting Consequences If scientists could somehow bring Europa as close to the sun as the Earth is, 1 AU, how do you think Europa would be affected?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

26. Identifying Relationships How did variations in the orbit of Uranus help scientists discover Neptune?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________






The graph below shows density versus mass for Earth, Uranus, and Neptune. Mass is given in Earth masses—the mass of Earth is equal to 1 Earth mass. The relative volumes for the planets are shown by the size of each circle. Use the graph below to answer the questions that follow.

27. Which planet is denser, Uranus or Neptune? How can you tell?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

28. You can see that although Earth has the smallest mass, it has the highest density of the three planets. How can Earth be the densest of the three when Uranus and Neptune have so much more mass than Earth does?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________



Holt Science and Technology 123 Earth, Sun, and Moon

Skills Worksheet

Section Review

Days and Seasons on Earth USING KEY TERMS

Correct the statement below by replacing the underlined term.

1. A(n) day is the time at which the sun is farthest north or south of the equator.

_______________________________________________________________

_______________________________________________________________


2. What causes daylight and night on Earth?

_______________________________________________________________

_______________________________________________________________

MATH SKILLS

3. Light travels about 300,000 km/s. If the distance between the sun and Earth is 150 million kilometers, how long does light take to travel from the sun to Earth? Show your work below.

CRITICAL THINKING

4. Applying Concepts If Earth’s tilt did not change, would Earth have seasons?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





5. Making Inferences Explain why the positions of Earth and the sun were used to develop calendars and clocks.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

6. Identifying Relationships Diagram the relationship of Earth and the sun that accounts for the seasons.

Name_______________________________Class __________________ Date __________________




Skills Worksheet

Section Review

Lunar Cycles USING KEY TERMS

Use a term from the section to complete each sentence below.

1. A(n) ______________________ happens when the shadow of one celestial

body falls on another body.

2. The various appearances of the moon that are due to changes in the moon’s

position are ______________________.

MATH SKILLS

3. The diameter of the moon is 3,475 km. What is the moon’s radius? Show your work below.

CRITICAL THINKING

4. Applying Concepts Explain why people on Earth always see the same side of the moon.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

5. Identifying Relationships Describe how the movement of Earth and the moon’s orbit cause the phases of the moon.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





6. Forming Hypotheses Why do you think the positions of the moon were used to develop the months of the year?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

7. Making Comparisons Draw the positions of Earth, the moon, and the sun during solar and lunar eclipses.

Name_______________________________Class __________________ Date __________________




Skills Worksheet

Section Review

Tides, the Sun, and the Moon USING KEY TERMS

1. Write an original definition for spring tide and neap tide.

_______________________________________________________________

_______________________________________________________________


2. Which tides have minimum tidal range? Which tides have maximum tidal range?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

3. What causes tidal bores?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

MATH SKILLS

4. A spot on Earth that is facing the moon takes 24 h and 50 min to rotate to face the moon again. How many minutes does this rotation take? Show your work below.

Name_______________________________Class __________________ Date __________________





CRITICAL THINKING

5. Analyzing Processes Explain how the position of the moon relates to the occurrence of tides.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

6. Identifying Relationships Illustrate the positions of Earth, the moon, and the sun during a spring tide and during a neap tide.

Name_______________________________Class __________________ Date __________________




Skills Worksheet

Chapter Review

USING KEY TERMS


1. equinox and solstice

_______________________________________________________________

_______________________________________________________________

2. spring tide and neap tide

_______________________________________________________________

_______________________________________________________________

Use a term from the chapter to complete each sentence below.

3. The daily changes of ocean water levels are commonly called

______________________.

4. A(n) ______________________ happens when one celestial body casts

a shadow on another celestial body.

5. A(n) ______________________ is the difference between the level of ocean

water at high tide and the level of ocean water at low tide.


Multiple Choice

_____ 6. Eclipses occur when the shadow of one celestial body, such as a planet, falls on another celestial body. When might an eclipse happen? a. every high tide b. only during a full moon c. when the moon is between the Earth and the sun d. when the sun is between the moon and the Earth

_____ 7. Which of the following happens at the solstices? a. The number of daylight hours equals the number of nighttime hours. b. Either spring or fall begins. c. The sun is directly above the equator. d. Either the Northern or Southern Hemisphere tilts toward the sun.

Name_______________________________Class __________________ Date __________________





_____ 8. The seasons are caused by Earth’s tilt as it travels around the sun. What causes winter in the Southern Hemisphere? a. The North Pole tilts away from the sun. b. The equator receives direct sunlight. c. Earth moves closer to the sun. d. The South Pole tilts away from the sun.

Short Answer

9. Describe and illustrate how changes in Earth’s tilt affect the amount of seasonal change that an area experiences.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

10. What causes the changes in seasons and changes in day length?

_______________________________________________________________

_______________________________________________________________

11. Compare solar and lunar eclipses.

_______________________________________________________________

_______________________________________________________________

12. What causes the moon’s phases? Provide a diagram with your answer.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

13. Why do the sun and the moon appear to move across the sky each day?

_______________________________________________________________

_______________________________________________________________

14. During which moon phase do solar eclipses happen?

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





15. Use an illustration to show why the tidal range is relatively small during a neap tide.

CRITICAL THINKING

Extended Response

16. Identifying Relationships The calendars of some ancient civilizations located near the equator were based solely on the lunar cycle rather than on Earth’s revolution around the sun. Explain why these civilizations most likely relied on a lunar calendar rather than a solar calendar.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

17. Analyzing Ideas Your family is planning to build a home near the beach. Which time is better for choosing the place to build the house: during spring tides or neap tides?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Concept Mapping

18. Use the following terms to create a concept map: phases, eclipse, revolution, solar eclipse, and lunar eclipse.

Name_______________________________Class __________________ Date __________________






Use the diagram below to answer the questions that follow.

19. At which position (A, B, C, or D) would the moon be during a neap tide?

_______________________________________________________________

20. At which position (A, B, C, or D) would the moon be during a spring tide?

_______________________________________________________________

21. Would a tidal range be greater with the moon at position C or position D? Why?

_______________________________________________________________

Name_______________________________Class __________________ Date __________________



Holt Science and Technology 133 Exploring Space

Skills Worksheet

Section Review

Rocket Science USING KEY TERMS

1. Use each of the following terms in a separate sentence: rocket, thrust, and NASA.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________


_____ 2. What factor must a rocket overcome to reach escape velocity? a. Earth’s axial tilt b. Earth’s gravity c. the thrust of its engines d. Newton’s third law of motion

3. Describe the contributions of Tsiolkovsky and Goddard to modern rocketry.

_______________________________________________________________

_______________________________________________________________

4. Use Newton’s third law of motion to describe how rockets work.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

5. What is the difference between orbital and escape velocity?

_______________________________________________________________

_______________________________________________________________

6. How did the Cold War accelerate the U.S. space program?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





MATH SKILLS

7. If you travel at 60 mi/h, it takes about 165 days to reach the moon. Approximately how far away is the moon? Show your work below.

CRITICAL THINKING

8. Applying Concepts How do rockets accelerate in space?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

9. Making Inferences Why does escape velocity vary depending on the planet from which a rocket is launched?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________




Skills Worksheet

Section Review

Artificial Satellites USING KEY TERMS

1. Use each of the following terms in a separate sentence: artificial satellite, low Earth orbit, and geostationary orbit.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________


_____ 2. In a low Earth orbit, the speed of a satellite is a. slower than the rotational speed of the Earth. b. equal to the rotational speed of the Earth. c. faster than the rotational speed of the Earth. d. None of the above

3. What was the name of the first satellite placed in orbit? List at least one unintended consequence.

_______________________________________________________________

_______________________________________________________________

4. List three ways that satellites benefit human society.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

5. What was the Explorer 1?

_______________________________________________________________

_______________________________________________________________

6. Explain the differences between LEO and GEO satellites.

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





7. How does the Global Positioning System work?

_______________________________________________________________

_______________________________________________________________

8. How do communications satellites relay signals around the curved surface of Earth?

_______________________________________________________________

_______________________________________________________________

MATH SKILLS

9. The speed required to reach Earth orbit is 8 km/s. What does this equal in meters per hour? Show your work below.

CRITICAL THINKING

10. Applying Concepts The Hubble Space Telescope is located in LEO. Will the telescope move faster or slower around the Earth compared with a geostationary weather satellite? Explain.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

11. Applying Concepts To triangulate your location on a map, you need to know your distance from three points. If you knew your distance from two points, how many places would your diagram show you to be?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________




Skills Worksheet

Section Review

Space Probes USING KEY TERMS



1. Luna 1 discovered evidence of water on the moon.

_______________________________________________________________

2. Venera 9 helped map 98% of Venus’s surface.

_______________________________________________________________

3. Stardust uses ion propulsion to accelerate.

_______________________________________________________________


_____ 4. What is the significance of the discovery of evidence of water on the moon? a. Water is responsible for the formation of craters. b. Water was left by early space probes. c. Water could be used by future moon colonies. d. The existence of water proves that there is life on the moon.

5. Describe three discoveries that have been made by space probes.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

6. How do missions to Venus, Mars, and Titan help us understand Earth’s environment?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





MATH SKILLS

7. Traveling at the speed of light, signals from Voyager 1 take about 12 h to reach Earth. If the speed of light is about 299,793 km/s, how far away is the probe? Show your work below.

CRITICAL THINKING

8. Making Inferences Why did we need space probes to discover water channels on Mars and evidence of ice on Europa?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

9. Expressing Opinions What are the advantages of the new Discovery program over the older space-probe missions, and what are the disadvantages?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

10. Applying Concepts How does Deep Space 1 use Newton’s third law of motion to accelerate?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________




Skills Worksheet

Section Review

People in Space USING KEY TERMS

1. Use each of the following terms in a separate sentence: space shuttle and space station.

_______________________________________________________________

_______________________________________________________________

USING KEY IDEAS

_____ 2. What is the main difference between the space shuttles and other space vehicles? a. The space shuttles are powered by liquid rocket fuel. b. The space shuttles take off like a plane and land like a rocket. c. The space shuttles are reusable. d. The space shuttles are not reusable.

3. Describe the history and future of human spaceflight. How was the race to explore space influenced by the Cold War?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

4. Describe five “space-age spinoffs.”

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

5. How will space stations help in the exploration of space?

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





6. In the 1970s, what was the main difference in the focus of the space programs in the United States and in the Soviet Union?

_______________________________________________________________

_______________________________________________________________

MATH SKILLS

7. When it is fueled, a space shuttle has a mass of about 2,000,000 kg. About 80% of that mass is fuel and oxygen. Calculate the weight of a space shuttle’s fuel and oxygen. Show your work below.

CRITICAL THINKING

8. Making Inferences Describe some intended benefits and unintended consequences of human space exploration.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

9. Expressing Opinions Imagine that you are a U.S. senator reviewing NASA’s proposed budget. Write a two-paragraph position statement expressing your opinion about increasing or decreasing funding for NASA.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________




Skills Worksheet

Chapter Review

USING KEY TERMS


1. geostationary orbit and low Earth orbit

_______________________________________________________________

_______________________________________________________________

2. space probe and space station

_______________________________________________________________

_______________________________________________________________

3. artificial satellite and moon

_______________________________________________________________

_______________________________________________________________


word bank.

escape velocity oxygen

nitrogen thrust

4. The force that accelerates a rocket is called ______________________.

5. Rockets need to have ______________________ in order to burn fuel.


Multiple Choice

_____ 6. Whose rocket research team surrendered to the Americans at the end of World War II? a. Konstantin Tsiolkovsky’s c. Wernher von Braun’s b. Robert Goddard’s d. Yuri Gagarin’s

_____ 7. Rockets work according to Newton’s a. first law of motion. b. second law of motion. c. third law of motion. d. law of universal gravitation.

_____ 8. The first artificial satellite to orbit the Earth was a. Pioneer 4. c. Voyager 2.

b. Explorer 1. d. Sputnik 1.

Name_______________________________Class __________________ Date __________________





_____ 9. Communications satellites are able to transfer TV signals between continents because communications satellites a. are located in LEO. b. relay signals past the horizon. c. travel quickly around Earth. d. can be used during the day and night.

_____ 10. GEO is a better orbit for communications satellites because satellites that are in GEO a. remain in position over one spot. b. have polar orbits. c. do not revolve around the Earth. d. orbit a few hundred kilometers above the Earth.

_____ 11. Which space probe discovered evidence of water at the moon’s south pole? a. Luna 9 c. Clementine

b. Viking 1 d. Magellan

_____ 12. When did humans first set foot on the moon? a. 1959 c. 1969 b. 1964 d. 1973

_____ 13. Which of the following planets has not yet been visited by space probes? a. Venus c. Mars b. Neptune d. Pluto

_____ 14. Which of the following space probes has left our solar system? a. Galileo c. Viking 10 b. Magellan d. Pioneer 10

_____ 15. Based on space-probe data, which of the following is the most likely place in our solar system to find liquid water? a. the moon c. Europa b. Mercury d. Venus

Short Answer

16. Describe how Newton’s third law of motion relates to the movement of rockets.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





17. What is one disadvantage that objects in LEO have?

_______________________________________________________________

_______________________________________________________________

18. Why did the United States develop the space shuttle?

_______________________________________________________________

_______________________________________________________________

19. How does data from satellites help us understand the Earth’s environment?

____________________________________________________________________

_______________________________________________________________

20. Concept Mapping Use the following terms to create a concept map: orbital velocity, thrust, LEO, artificial satellites, escape velocity, space probes, GEO,

and rockets.

Name_______________________________Class __________________ Date __________________





21. Making Inferences What is the difference between speed and velocity?

____________________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

22. Applying Concepts Why must rockets that travel in outer space carry oxygen with them?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

23. Expressing Opinions What impact has space research had on scientific thought, on society, and on the environment?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





The diagram below illustrates suborbital velocity, orbital velocity, and escape

velocity. Use the diagram below to answer the questions that follow.

24. Could a rocket traveling at 6 km/s reach orbital velocity?

_______________________________________________________________

25. If a rocket traveled for 3 days at the minimum escape velocity, how far would the rocket travel?

_______________________________________________________________

26. How much faster would a rocket traveling in orbital velocity need to travel to reach escape velocity?

_______________________________________________________________

27. If the escape velocity for a planet was 9 km/s, would you assume that the mass of the planet was more or less than the mass of Earth?

_______________________________________________________________

Name_______________________________Class __________________ Date __________________



Holt Science and Technology 146 Energy and Energy Resources

Skills Worksheet

Section Review

What Is Energy? USING KEY TERMS

1. In your own words, write a definition for the term energy.

_______________________________________________________________

_______________________________________________________________

2. Use the following terms in the same sentence: kinetic energy, potential energy, and mechanical energy.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________


_____ 3. What determines an object’s thermal energy? a. the motion of its particles b. its size c. its potential energy d. its mechanical energy

4. How are energy and work related?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

5. What two factors determine gravitational potential energy?

_______________________________________________________________

_______________________________________________________________

6. Describe why chemical energy is a form of potential energy.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





CRITICAL THINKING

7. Identifying Relationships When you hit a nail into a board with a hammer, the head of the nail gets warm. In terms of kinetic and thermal energy, describe why you think the nail head gets warm.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

8. Applying Concepts Explain why a high-speed collision may cause more damage to vehicles than a low-speed collision does.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________


9. Look at the photograph in your textbook for this Section Review. Which part of mechanical energy does the girl in the picture have the most of?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________




Skills Worksheet

Section Review

Energy Conversions USING KEY TERMS

1. In your own words, write a definition for the term energy conversion.

_______________________________________________________________

_______________________________________________________________


_____ 2. In plants, energy is transformed from a. kinetic to potential. c. chemical to electrical. b. light to chemical. d. chemical to light.

3. How does your body get the energy that it needs?

_______________________________________________________________

_______________________________________________________________

4. What is the role of machines in energy conversions?

_______________________________________________________________

_______________________________________________________________

CRITICAL THINKING

5. Applying Concepts Design a model that demonstrates the various types of energy transformations that take place in an electric hair dryer. Refer to familiar equipment and materials from your classroom laboratory to help you in your design.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

6. Applying Concepts Describe the kinetic-potential energy conversions that occur when a basketball bounces.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





7. Applying Concepts A car that brakes suddenly comes to a screeching halt. Is the sound energy produced in this conversion a useful form of energy? Explain your answer.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________


Look at the diagram below, and answer the following questions.

8. What kind of energy does the skier have at the top of the slope?

_______________________________________________________________

_______________________________________________________________

9. What happens to that energy after the skier races down the slope of the mountain?

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________




Skills Worksheet

Section Review

Conservation of Energy USING KEY TERMS

1. Use the following terms in the same sentence: friction and the law of

conservation of energy.

_______________________________________________________________

_______________________________________________________________


_____ 2. Perpetual motion is impossible because a. things tend to slow down. b. energy is lost. c. machines are very inefficient. d. machines have friction.

3. Describe the energy conversions that take place on a roller coaster, and explain how energy is conserved.

_______________________________________________________________

_______________________________________________________________

MATH SKILLS

4. A bike is pedaled with 80 J of energy and then coasts. It does 60 J of work in moving forward until it stops. How much of the energy that was put into the bike became thermal energy? Show your work below.

Name_______________________________Class __________________ Date __________________





CRITICAL THINKING

5. Evaluating Conclusions Imagine that you drop a ball. It bounces a few times and then it stops. Your friend says that the energy that the ball had is gone. Where did the energy go? Evaluate your friend’s statement based on energy conservation.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

6. Evaluating Assumptions If someone says that a car has high energy output, can you conclude that the car is efficient? Explain.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________




Skills Worksheet

Section Review

Energy Resources USING KEY TERMS

1. In your own words, write a definition for the term fossil fuel.

_______________________________________________________________

_______________________________________________________________


word bank.

nonrenewable resources renewable resources

2. How do renewable resources differ from nonrenewable resources?

_______________________________________________________________

_______________________________________________________________


_____ 3. Which of the following is a renewable resource? a. wind b. coal c. nuclear energy d. petroleum

4. Compare fossil fuels and biomass as energy resources.

_______________________________________________________________

_______________________________________________________________

5. Trace electrical energy back to the sun.

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





CRITICAL THINKING

6. List some of the unintended consequences of technologies that use fossil fuels.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

7. Making Comparisons Describe the similarities and differences between transforming energy in a hydroelectric dam and a wind turbine.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

8. Analyzing Ideas Name an energy resource that does NOT depend on the sun.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________


9. Use the pie chart below to explain why renewable resources are becoming more important to the United States.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________




Skills Worksheet

Chapter Review

USING KEY TERMS


1. potential energy and kinetic energy

_______________________________________________________________

_______________________________________________________________

2. mechanical energy and energy conversion

_______________________________________________________________

_______________________________________________________________

3. friction and the law of conservation of energy

_______________________________________________________________

_______________________________________________________________

4. renewable resources and nonrenewable resources

_______________________________________________________________

_______________________________________________________________

5. energy resources and fossil fuels

_______________________________________________________________

_______________________________________________________________


Multiple Choice

_____ 6. Which of the following benefits and drawbacks best relate to solar energy technology? a. It is cheap, but it produces pollution. b. It is plentiful, but it is nonrenewable. c. It is plentiful, but it is expensive to develop on a large scale. d. It can be used in any location, but it is expensive to develop on a

large scale.

_____ 7. Gravitational potential energy depends on a. mass and velocity. c. mass and weight. b. weight and height. d. height and distance.

Name_______________________________Class __________________ Date __________________





_____ 8. Which of the following types of energy is not a renewable resource? a. wind energy c. solar energy b. nuclear energy d. geothermal energy

_____ 9. Which of the following sentences describes a conversion from chemical energy to thermal energy? a. Food is digested and used to regulate body temperature. b. Charcoal is burned in a barbecue pit. c. Coal is burned to produce steam. d. All of the above

_____ 10. When energy changes from one form to another, some of the energy always changes into a. kinetic energy. b. potential energy. c. thermal energy. d. mechanical energy.

Short Answer

11. Name two forms of energy, and relate them to kinetic or potential energy.

_______________________________________________________________

_______________________________________________________________

12. Give three examples of one form of energy being converted into another form.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

13. Explain what a closed system is, and how energy is conserved within it.

_______________________________________________________________

_______________________________________________________________

14. How are fossil fuels formed?

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





Math Skills

15. A box has 400 J of gravitational potential energy.

a. How much work had to be done to give the box that energy? Show your work below.

b. If the box weighs 100 N, how far above the ground is it? Show your work below.

CRITICAL THINKING

16. Concept Mapping Use the following terms to create a concept map: energy,

machines, sound energy, hair dryer, electrical energy, energy conversions,

thermal energy, and kinetic energy.

Name_______________________________Class __________________ Date __________________





17. Analyzing Ideas Identify three forms of potential energy. What makes these forms of energy alike and what makes them different?

_______________________________________________________________

_______________________________________________________________

18. Identifying Relationships Explain what energy conversions occur in a pendulum that swings back and forth from positions of rest, through maximum speed, until it stops. Is energy conserved during this process?

_______________________________________________________________

_______________________________________________________________

19. Predicting Consequences Imagine that the sun ran out of energy. What would happen to our energy resources on Earth?

_______________________________________________________________

_______________________________________________________________

20. Analyzing Processes Look at the image below. Beginning with the pole vaulter's breakfast, trace the energy conversions necessary for the event shown to take place.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________






Use the graphic below to answer the questions that follow.

21. What is the skier’s gravitational energy at point a?

_______________________________________________________________

_______________________________________________________________

22. What is the skier’s gravitational energy at point b?

_______________________________________________________________

_______________________________________________________________

23. What is the skier’s kinetic energy at point b?(Hint: mechanical energy = potential energy + kinetic energy)

_______________________________________________________________

_______________________________________________________________

CHALLENGE

24. Design a model that demonstrates the various energy transformations that take place in the conversion of falling water to electricity. Refer to familiar equipment and materials from your classroom laboratory to help you in your design.

_______________________________________________________________

_______________________________________________________________

25. Create a poster that illustrates the three main forms of potential energy.

Name_______________________________Class __________________ Date __________________



Holt Science and Technology 159 Heat and Heat Technology

Skills Worksheet

Section Review

Temperature USING KEY TERMS

1. In your own words, write a definition for the term temperature.

_______________________________________________________________

_______________________________________________________________

2. Use each of the following terms in a separate sentence: thermal expansion and absolute zero.

_______________________________________________________________

_______________________________________________________________


_____ 3. Which of the following is the coldest temperature possible? a. 0 K c. 0ºF b. 0ºC d. –273ºF

4. Does temperature depend on the amount of the substance? Explain.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

5. Describe the process of thermal expansion.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

MATH SKILLS

6. Convert 35ºC to degrees Fahrenheit. Show your work below.

Name_______________________________Class __________________ Date __________________





7. Convert 34°F to degrees Celsius. Show your work below.

8. Convert 0°C to kelvins. Show your work below.

9. Convert 100 K to degrees Celsius. Show your work below.

CRITICAL THINKING

10. Analyzing Processes Explain how the physical process of thermal expansion makes expansion joints useful. What social and economic problems might society have if this problem could not be solved?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





11. Analyzing Processes During thermal expansion, what happens to the density of a substance?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

12. Forming Hypotheses A glass of cold water whose particles had a low average kinetic energy was placed on a table. The average kinetic energy in the cold water increased, while the average kinetic energy of the part of the table under the glass decreased. What do you think happened? Describe how you might demonstrate the changes in the average kinetic energy of the water, glass, and table.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________




Skills Worksheet

Section Review

What Is Heat? USING KEY TERMS


1. thermal conductor and thermal insulator

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

2. convection and radiation

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________


_____ 3. Two objects at different temperatures are in contact. Which of the following happens to their thermal energy? a. Their thermal energies remain the same. b. Thermal energy passes from the cooler object to the warmer object. c. Thermal energy passes from the warmer object to the cooler object. d. Thermal energy passes back and forth equally between the two

objects.

4. What happens when sunlight transfers energy to the air closest to the ground?

_______________________________________________________________

_______________________________________________________________

MATH SKILLS

5. The specific heat of lead is 128 J/kg•°C. How much thermal energy is needed to raise the temperature of a 0.015 kg sample of lead by 10ºC? Show your work below.

Name_______________________________Class __________________ Date __________________





CRITICAL THINKING

6. Making Inferences Two objects have the same total thermal energy. They are different sizes. Are they at the same temperature? Explain.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

7. Applying Concepts Why do many metal cooking utensils have wooden handles?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________


8. Look at the photo in your textbook for this question. It shows examples of heat transfer by conduction, convection, and radiation. Indicate which type of heat transfer is happening next to each letter.

A______________________

B______________________

C______________________

Name_______________________________Class __________________ Date __________________




Skills Worksheet

Section Review

Matter and Heat USING KEY TERMS

1. Use each of the following terms in a separate sentence: states of matter and change of state.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________


_____ 2. What determines a substance’s state? a. the size of its particles b. the amount of the substance c. the speed of its particles and the attraction between them d. the chemical energy that the substance has

3. During a change of state, why doesn’t the temperature of the substance change?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

MATH SKILLS

4. When burned in a calorimeter, a sample of popcorn released 627,600 J. How much energy, in Calories, did the popcorn have? Show your work below.

Name_______________________________Class __________________ Date __________________





CRITICAL THINKING

5. Applying Concepts Many cold packs used for sports injuries are activated by bending the package, causing the substances inside to chemically react. How is heat involved in this process?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

6. Analyzing Processes When water evaporates (changes from a liquid to a gas), the air near the water’s surface becomes cooler. Explain why.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________




Skills Worksheet

Section Review

Heat Technology USING KEY TERMS

1. Use each of the following terms in a separate sentence: insulation, heat engine, and thermal pollution.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________


_____ 2. Which of the following describes how cooling systems transfer thermal energy? a. Thermal energy naturally flows from cooler areas to warmer areas. b. Thermal energy naturally flows from warmer areas to cooler areas. c. Work is done to transfer thermal energy from warmer areas to cooler

areas. d. Work is done to transfer thermal energy from cooler areas to warmer

areas.

3. What is the difference between an external combustion engine and an internal combustion engine?

_______________________________________________________________

_______________________________________________________________

CRITICAL THINKING

4. Identifying Relationships How are changes of state important in how a refrigerator works?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





5. Expressing Opinions Compare the advantages and disadvantages of solar heating systems. What do you think their overall benefits are, compared with those of other heating systems? Why do you think people are interested in the technology?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

6. Applying Concepts How might you demonstrate the various energy transfers that occur in a solar heating system?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________


7. The graph below shows the cost of heating one house month by month for a year. During which months is the most energy used for heating? Explain your answer.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________




Skills Worksheet

Chapter Review

USING KEY TERMS


1. temperature and thermal energy

_______________________________________________________________

_______________________________________________________________

2. conduction and heat

_______________________________________________________________

_______________________________________________________________

3. conductor and insulator

_______________________________________________________________

_______________________________________________________________

4. states of matter and change of state

_______________________________________________________________

_______________________________________________________________

5. heat engine and thermal pollution

_______________________________________________________________

_______________________________________________________________


Multiple Choice

_____ 6. Which of the following temperatures is the lowest? a. 100ºC b. 100ºF c. 100 K d. They are all the same.

_____ 7. Which of the following materials would NOT be a good insulator? a. wood b. cloth c. metal d. rubber

Name_______________________________Class __________________ Date __________________





_____ 8. In an air conditioner, thermal energy is a. transferred from areas of higher temperatures to areas of lower

temperatures. b. transferred from areas of lower temperatures to areas of higher

temperatures. c. used to do work. d. transferred into the building.

_____ 9. Wind results when air is heated by sunlight, causing a. conduction. b. convection. c. radiation. d. Both (a) and (b)

_____ 10. Compared with the Pacific Ocean, a cup of hot chocolate has a. more thermal energy and a higher temperature. b. less thermal energy and a higher temperature. c. more thermal energy and a lower temperature. d. less thermal energy and a lower temperature.

Short Answer

11. How does temperature relate to kinetic energy?

_______________________________________________________________

_______________________________________________________________

12. What are the differences between conduction, convection, and radiation?

_______________________________________________________________

_______________________________________________________________

13. Explain how heat affects matter during a change of state.

_______________________________________________________________

_______________________________________________________________

Math Skills

14. The weather forecast calls for a temperature of 84ºF. What is the corresponding temperature in degrees Celsius? in kelvins? Show your work below.

Name_______________________________Class __________________ Date __________________





15. Suppose 1.3 kg of water is heated from 20ºC to 100ºC. How much energy was transferred to the water? (Water’s specific heat is 4,184 J/kg•ºC.) Show your work below.

CRITICAL THINKING

16. Concept Mapping Create a concept map using the following terms: thermal energy, temperature, radiation, heat, conduction, and convection.

17. Applying Concepts On a warm, sunny day you run barefoot onto your sidewalk. What happens to your bare feet? Where did the energy come from to make this happen?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





18. Applying Concepts How does a down jacket keep you warm? (Hint: Think about what insulation does.)

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

19. Predicting Consequences Would opening the refrigerator cool a room in a house? Explain your answer.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

20. Evaluating Assumptions Someone claims that a large bowl of soup has more thermal energy than a small bowl of soup. Is this always true? Explain.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

21. Predicting Consequences A hydrothermal vent is an area in the ocean floor that lets out extremely hot water and chemicals such as hydrogen sulfide. Sea animals such as the giant tube worm live in these areas. These vents often form in clusters. What would you expect to happen if a new hydrothermal vent opened near an already-opened vent?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

22. Analyzing Processes What is different about the two kinds of metal on the bimetallic strip of a thermostat coil?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





23. Analyzing Processes Suppose you wish to investigate the relationship between the sun and atmospheric convection in your are. What information would you need to gather to perform your investigation?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________


Examine the graph below, and then answer the questions that follow.

24 .What physical change does this graph illustrate?

_______________________________________________________________

_______________________________________________________________

25. What is the freezing point of this liquid?

_______________________________________________________________

_______________________________________________________________

26. What is happening at the point where the line is horizontal?

____________________________________________________________________

____________________________________________________________________

CHALLENGE

27. Research the development of internal combustion engines, including the improvements that have been made to them during the last 100 years. Compare the benefits and disadvantages of these engines. Examine how unintended consequences of the engine have affected society and have in turn led to improvements in engine technology. Design a method to present your findings.

Name_______________________________Class __________________ Date __________________



Holt Science and Technology 173 Electricity

Skills Worksheet

Section Review

Electric Charge and Static Electricity USING KEY TERMS


1. static electricity and electric discharge

_______________________________________________________________

_______________________________________________________________

2. electric force and electric field

_______________________________________________________________

_______________________________________________________________

3. electrical conductor and electrical insulator

_______________________________________________________________

_______________________________________________________________


_____ 4. Which part of an atom is involved in charging objects? a. proton b. neutron c. electron d. nucleus

5. Compare the three methods of charging.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

6. What does the law of electric charges say about two objects that are positively charged?

_______________________________________________________________

_______________________________________________________________

7. Give two examples of static electricity.

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





8. List two examples of electric discharge.

_______________________________________________________________

_______________________________________________________________

CRITICAL THINKING

9. Analyzing Processes Imagine that you touch the top of an electroscope with an object. The metal leaves spread apart. Can you determine whether the charge is positive or negative? Explain your answer.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

10. Applying Concepts Explain how an electrical conductor differs from an electrical insulator.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________






The image below shows two charged balloons. Use the image below to answer the

questions that follow.

11. Do the balloons have the same charge or opposite charges? Explain your answer.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

12. How would the image look if each balloon were given the charge opposite to the charge it has now? Explain your answer.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________




Skills Worksheet

Section Review

Electric Current and Electrical Energy USING KEY TERMS


word bank

voltage electric current

resistance cell

1. The rate at which charges pass a point is a(n) ______________________.

2. The rate at which charges pass a point is ______________________.

3. Another term for potential difference is ______________________.

4. A device that changes chemical energy into electrical energy is a(n)

______________________.


_____ 5. Which of the following factors affects the resistance of an object? a. thickness of the object b. length of the object c. temperature of the object d. All of the above

6. Name the parts of a cell, and explain how they work together to produce an electric current.

_______________________________________________________________

_______________________________________________________________

7. Compare alternating current with direct current.

_______________________________________________________________

_______________________________________________________________

8. How do the currents produced by a 1.5 V flashlight cell and a 12 V car battery compare if the resistance is the same?

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________





9. How does increasing the resistance affect the current?

_______________________________________________________________

_______________________________________________________________

CRITICAL THINKING

10. Making Comparisons A friend is having trouble studying the types of cells in this section. Explain to your friend how the terms photocell and thermocouple hold clues that can help him or her remember the type of energy taken in by each device.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

11. Making Inferences Why do you think some calculators that contain photocells also contain batteries?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

12. Applying Concepts Which wire would have the lowest resistance: a long, thin iron wire at a high temperature or a short, thick copper wire at a low temperature?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________


13. The wires shown below are made of copper and have the same temperature. Which wire should have the lower resistance? Explain your answer.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

A

B

Name_______________________________Class __________________ Date __________________




Skills Worksheet

Section Review

Electrical Calculations USING KEY TERMS

1. In your own words, write a definition for the term electric power.

_______________________________________________________________

_______________________________________________________________


_____ 2. Which of the following is Ohm’s law?

a. E = P t

b. I = V R

c. P = V I

d. V = I R

3. Circuit A has twice the resistance of circuit B. The voltage is the same in each circuit. Which circuit has the higher current?

_______________________________________________________________

_______________________________________________________________

MATH SKILLS

4. Use Ohm’s law to find the voltage needed to make a current of 3 A in a

resistance of 9 . Show your work below.

5. How much electrical energy does a 40 W light bulb use if it is left on for 12 h? Show your work below.

Name_______________________________Class __________________ Date __________________





CRITICAL THINKING

6. Applying Concepts Explain why increasing the voltage applied to a wire can have the same effect on the current in the wire that decreasing the resistance of the wire does.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

7. Identifying Relationships Using the equations in this section, develop an equation to find electrical energy from time, current, and resistance.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Name_______________________________Class __________________ Date __________________




Skills Worksheet

Section Review

Electric Circuits USING KEY TERMS

1. In your own words, write a definition for each of the following terms: series

circuit and parallel circuit.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________


_____ 2. Which part of a circuit changes electrical energy into another form of energy? a. energy source b. wire c. switch d. load

3. Name and describe the three essential parts of a circuit.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

4. How do fuses and circuit breakers protect your home against electrical fires?

_______________________________________________________________

_______________________________________________________________

5. Construct a poster illustrating how electricity passes through a simple circuit to produce heat, light, or sound.

Name_______________________________Class __________________ Date __________________





CRITICAL THINKING

6. Forming Hypotheses Suppose that you turn on the heater in your room and all of the lights in your room go out. Propose a reason why the lights went out.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

7. Applying Concepts Will a fuse work successfully if it is connected in parallel with the device it is supposed to protect? Explain your answer.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________


8. Look at the circuits below. Identify each circuit as a parallel circuit or a series circuit.

a. _____________________________________________________________

b. _____________________________________________________________

Name_______________________________Class __________________ Date __________________




Skills Worksheet

Chapter Review

USING KEY TERMS



1. Charges flow easily in an electrical insulator.

_______________________________________________________________

2. Lightning is a form of static electricity.

_______________________________________________________________

3. A thermocouple converts chemical energy into electrical energy.

_______________________________________________________________

4. Voltage is the opposition to the current by a material.

_______________________________________________________________

5. Electric force is the rate at which electrical energy is converted into other forms of energy.

_______________________________________________________________

6. Each load in a parallel circuit has the same current.

_______________________________________________________________


Multiple Choice

_____ 7. Two objects repel each other. What charges might the objects have? a. positive and positive c. negative and negative b. positive and negative d. Both (a) and (c)

_____ 8. Which device converts chemical energy into electrical energy? a. lightning rod c. light bulb b. cell d. switch

_____ 9. Which of the following wires has the lowest resistance? a. a short, thick copper wire at 25°C b. a long, thick copper wire at 35°C c. a long, thin copper wire at 35°C d. a short, thick iron wire at 25°C

_____ 10. An object becomes charged when the atoms in the object gain or lose a. protons. c. electrons. b. neutrons. d. All of the above

Name_______________________________Class __________________ Date __________________





_____ 11. Which of the following devices does NOT protect you from electrical fires? a. electric meter b. circuit breaker c. fuse d. ground fault circuit interrupter

_____ 12. For a cell to produce a current, the electrodes of the cell must a. have a potential difference. b. be in a liquid. c. be exposed to light. d. be at two different temperatures.

_____ 13. The outlets in your home provide a. direct current. c. electric discharge b. alternating current. d. static electricity.

Short Answer

14. Describe how a switch controls a circuit

_______________________________________________________________

_______________________________________________________________

15. Name the two factors that affect the strength of electric force, and explain how they affect electric force

_______________________________________________________________

_______________________________________________________________

16. Describe how direct current differs from alternating current

_______________________________________________________________

_______________________________________________________________

Math Skills

17. What voltage is needed to produce a 6 A current in an object that has a

resistance of 3 ? Show your work below

Name_______________________________Class __________________ Date __________________





18. Find the current produced when a voltage of 60 V is applied to a resistance of

15 . Show your work below

19. What is the resistance of an object if a voltage of 40 V produces a current of 5 A? Show your work below

20. A light bulb is rated at 150 W. How much current is in the bulb if 120 V is applied to the bulb? Show your work below

21. How much electrical energy does a 60 W light bulb use if it is used for 1,000 hours? Show your work below.

Name_______________________________Class __________________ Date __________________





CRITICAL THINKING

22. Concept Mapping Use the following terms to create a concept map: electric current, battery, charges, photocell, thermocouple, circuit, parallel circuit, and series circuit.

Name_______________________________Class __________________ Date __________________





23. Making Inferences Suppose your science classroom was rewired over the weekend. On Monday, you notice that the lights in the room must be on for the fish-tank bubbler to work. And if you want to use the computer, you must turn on the overhead projector. Describe what mistake the electrician made when working on the circuits in your classroom.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

24. Applying Concepts You can make a cell by using an apple, a strip of copper, and a strip of silver. Explain how you would design and construct the cell. Identify the parts of the cell. What type of cell did you make? Explain your answer.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

25. Applying Concepts Your friend shows you a magic trick. First, she rubs a plastic pipe on a piece of wool. Then, she holds the pipe close to an empty soda can that is lying on its side. When the pipe is close to the can, the can rolls toward the pipe. Explain how this trick works.

_______________________________________________________________

_______________________________________________________________


26. Classify the objects in the image below as electrical conductors or electrical insulators.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

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