These go in the 2 nd section of your binder. Write the Date and
Title. Copy and answer the questions. 8 th Grade Science
Warm-ups
Slide 2
Unscramble the following words for a sneak peek of the topics
we will cover this year! a) bla lsslik b) mcytsheri c) areht
ieenccs d) lobogiy The underlined letter is the first letter of
each word. Warm-up #1
Slide 3
Unscramble the following words for a sneak peek of the topics
we will cover this year! a) Lab Skills b) Chemistry c) Earth
Science d) Biology a) bla lsslik b) mcytsheri c) areht ieenccs d)
lobogiy The underlined letter is the first letter of each
word.
Slide 4
Whats wrong? See if you can identify 6 different safety
concerns shown in the picture below. Image:
http://morrisonlabs.com/lab_safety.htm
Slide 5
The answers are Image: http://morrisonlabs.com/lab_safety.htm
Dont eat or drink while in the lab. Dont fool around during a lab.
Always wear safety goggles when doing an experiment Always point
test tubes and other items away from yourself and others when
heating. Keep hair and other flammable objects away from flames.
Dont leave a flame unattended.
Slide 6
Warm-up #3 Read the scenario on the following page. Do NOT copy
the paragraph or questions. Answer the questions in complete
sentences.
Slide 7
SpongeBob and Patrick love to go jellyfishing. They wondered if
a new brand of jellyfish bait would help them catch more jellyfish.
To test their idea, they bought a big container of bait for their
next 3 trips to their top-secret fishing spot. SpongeBob fished
without any bait, while Patrick used the new bait. Both of them
kept track of how many jellyfish they caught in 30 minutes, which
is shown in the chart. 1.Which person was the control? 2. What is
the independent variable? 3. What is the dependent variable?
SpongeBobPatrick 2524 1828 2619
Slide 8
Warm-up #4 Joeys brand new shoes have created black scuff marks
all over the tile floor. Joey wants to know which cleaner will
remove the marks the best; Clorox, 409, or Mr. Clean. 1. Write a
hypothesis for Joey. 2. What would be his independent variable? 3.
What would be his dependent variable?
Slide 9
Warm-up #5 Name that vocabulary word! Write the statement and
answer. 1. I have mass and take up space. 2. I am the building
block of all matter. 3. I am made of only one type of atom. 4. I am
a chemical combination of different atoms.
Slide 10
Warm-up #6 Name that vocabulary word! Write the statement and
answer. 1. I am a physical combination of substances. 2. I am a
mixture of uniform composition. 3. You can see my different parts.
4. I am another name for homogeneous mixture.
Slide 11
Warm-up #7 A hypothesis is _______________. The ______ variable
is what is measured in an experiment. ________ are chemical
combinations of two or more atoms. A salad is an example of a _____
mixture.
Slide 12
Warm-up #8 Copy and answer. 1. Atomic number = _____________ 2.
The number of ______ identifies the element. 3. How do you estimate
neutrons in an atom? 4. What is the charge of the subatomic
particle?
Slide 13
Warm-up #9 Use the periodic table to answer the questions. 1.
What is the atomic number for Chlorine? 2. What is the atomic mass
for Boron? 3. How many protons are in an atom of Na? 4. How many
neutrons are in an atom of He? 5. How many electrons are in an atom
of Cl? 6. How many neutrons are in an atom of Na?
Slide 14
5 B Boron 10.81 2 He Helium 4.003 11 Na Sodium 22.990 17 Cl
Chlorine 35.453 The answers are 1.What is the atomic number for
Chlorine? 2.What is the atomic mass for Boron? 3.How many protons
are in an atom of Na? 4.How many neutrons are in an atom of He?
5.How many electrons are in an atom of Cl? 6.How many neutrons are
in an atom of Na? 17 10.81 or 11 11 2 17 12
Slide 15
Warm-up #10 Copy and complete the following paragraph.
Dmitri_____ made the first periodic table by arranging the elements
in order of increasing ____ and grouping them by similar ____. The
modern periodic table is arranged by increasing ____. The rows are
called ____ and the columns are called _____.
Slide 16
Warm-up #11 What is it? Rearrange the symbols for the elements
and use the clues provided to figure out the words. Example:
Something to follow Thorium + Protactinium 1.Youll want to be
first! Cerium + Radium 2.Masked bandit Nitrogen + Cobalt + Radium +
Oxygen 3. Beware of this snake! Oxygen + Carbon + Boron + Radium Th
+ Pa PATH
Slide 17
The answers are 1. Youll want to be first! Cerium + Radium 2.
Masked bandit Nitrogen + Cobalt + Radium + Oxygen 3. Beware of this
snake! Oxygen + Carbon + Boron + Radium Ce + RaRACE N + Co + Ra + O
RACOON O + C + B + Ra COBRA
Slide 18
Warm-up #12 Use your knowledge of the periodic table to
identify the following information: 1. I am an Alkaline Earth Metal
and have 4 energy levels. 2. I am a Halogen with 45 neutrons. 3. I
am a transition metal with 40 electrons. 4. I am the only metalloid
in group 3A. 5. I have 6 energy levels and 4 valence electrons
Slide 19
Warm-up #13 Copy and Answer the following: 1. A ______ is a
description of the characteristics of a substance. 2. A ______
property can be observed without changing the identity of the
substance. 3. Density is ______ divided by the ________. 4.
________ is the amount of heat needed to change the temperature of
an object.
Slide 20
Warm-Up #14 Copy and answer the following: 1. A ___________
property can only be observed by changing the identity of the
substance. 2. _____ is the ability of a metal to be drawn into
wires. 3. Flammability is an example of a _______ property. 4.
Malleability is an example of a ________ property.
Slide 21
Warm-up #15 Copy and Answer: 1. What is the density of a
substance with a mass of 40g and a volume of 20mL. 2. Would this
object sink or float when placed in a container of pure water? 3.
What piece of equipment is used to measure the volume of a
liquid?
Slide 22
Warm-up #16 Answer using complete sentences. 1. Describe how
the particles are arranged when matter is in the solid phase. 2.
Describe the shape and volume of a liquid. 3. How does heating a
liquid cause it turn into a gas? 4. What phase change occurs when a
liquid converts to a solid?
Slide 23
Warm-up #17 Answer using complete sentences. 1. What is the
main difference between physical and chemical changes? 2. What are
4 clues that indicate a chemical reaction has happened? 3. What is
a precipitate?
Slide 24
Warm-up #18 Copy and Answer #1-3. Just answer #4. 1. Chemical
changes are also called chemical ___ 2. During a chemical reaction
atoms may be ____, _____, or ____ to make new substances. 3. A
________ is the force of attraction that holds atoms together in a
compound. 4. Draw a sketch of the periodic table and indicate where
the metals are located and where the nonmetals are located.
Slide 25
Warm-up #19 Copy and Answer #1-2. 1. Ionic bonds are formed by
________ electrons between a ______ and ______. 2. According to the
law of conservation of _____, the mass of the reactants must equal
the ____. 3. Label the reactants and products in this reaction:
AgNO 3 + NaCl AgCl + NaNO 3
Slide 26
Warm-up #20 1.Copy and answer: SO 2 is held together by ___
bonds which are formed by ______ valence electrons. Copy the
following equation. Then use it to give the requested info. 4Fe +
3O 2 2Fe 2 O 3 2.Label the reactants and products. 3.Draw an
illustration of this reaction showing the number of atoms and
molecules. 4.Count the # of each type of atom on each side of the
equation:
Slide 27
Warm-up #21 Copy and answer: 1. What is the atomic number of
Phosphorus? 2. Would silver nitrate (AgNO 3 ) be considered and
element, compound, or mixture? 3. How many valence electrons are in
Chlorine? 4. Complete the missing information: ___CH 4 + ___O 2
___CO 2 + ___H 2 O
Slide 28
Warm-up #22 Copy and answer: 1. Magnesium has ____ protons. 2.
An ________ reaction is one that produces (gives off) heat. 3.
According to the Collision Theory particles must ______ with enough
______ to react. 4. The rate of a chemical reaction can be
increased by:
Slide 29
Warm-up #23 Copy and answer: 1. The rate of a reaction can be
increased by_______ the temperature. 2. A ______ is a substance
that speeds up the rate of a chemical reaction without being
consumed or changed by that reaction. 3. A reaction that absorbs
heat would be ____. 4. How many protons and neutrons are in an atom
of sodium?
Slide 30
Warm-up #24 Copy and answer: 1. The ability of a substance to
dissolve is ______, and is an example of a ______ property. 2.
Vertical columns on the periodic table are _____, and their number
tells the number of _______. 3. 2H 2 + O 2 2H 2 O 4g 32g ?g
Slide 31
Warm-up #25 Copy and Answer: 1. Compounds are held together by
attractions between atoms called __________. Answer using a
complete sentence: 2. How would you define/explain the concept of
energy? 3. Where do we get energy?
Slide 32
Warm-up #26 Copy and Answer: 1. Energy is the ability to do
__________. 2. Work must result in ______________. 3. Energy that
is stored is ___________. 4. Energy that is being used to cause
motion is ____________.
Slide 33
Warm-up #27 Copy and Answer: 1. Potential energy stored in the
bonds between atoms is ______. 2. Gravitational potential energy is
stored due to the ____ and mass of an object. 3. Electrical energy
is caused by the motion of ___ 4. The motion of atoms and molecules
within a substance creates _____ which is also known as
____energy.
Slide 34
Warm-up #28 Copy and Answer. 1. Electromagnetic waves are
______energy. 2. Longitudinal waves are ________. 3. Nuclear energy
stores energy in the ____. 4. Fission is an example of _______
energy and occurs by ________ nuclei.
Slide 35
Warm-up #29 Copy and Answer. 1. The four types of potential
energy are: 2. The five types of kinetic energy are: 3. The Law of
________________ states that energy cannot be created or destroyed,
but it can be ___________ from one type to another.
Slide 36
Warm-up #30 Copy and Answer. 1. Wind would be an example of
_____ energy. 2. When the wind turns a windmill there is a build-up
of _____ energy. 3. This energy can be used to transfer electrons
through a wire in the form of _______ energy.
Slide 37
Warm-up #31 1. Describe the flow of heat when you place an ice
cube into a glass of tea. 2. Trace the transformations of energy
that must occur to fuel your body.
Slide 38
Warm-up #32 1. Trace the transformations of energy needed to
power a car. Start with the sun. 2. Resources that can be easily
replenished are __________. 3. Resources that cannot be easily
replaced are __________.
Slide 39
Warm-up #33 1. List five renewable resources. 2. List four
nonrenewable resources. 3. Most of the energy needs of Americans
are powered by _____ resources.
Slide 40
Warm-up #34 1. What type of energy stores energy due to the
position (height) of an object? 2. Solar power is a ___ source of
energy, and it represents ___ energy caused by fusion. 3.
Hydropower is an example of ____ energy and is harnessed by using a
______.
Slide 41
Warm-up #35 Copy and answer. 1. The following sources of energy
are considered fossil fuels: 2. Uranium is used to harness
_____energy. Answer 3. What energy transformations must occur
(starting with the sun) in order to bake a cake in the oven?
Slide 42
Warm-up #36 1. Draw and explain the greenhouse effect. 2. Is
the greenhouse effect good or bad? 3. What particular gas is
thought to increase the magnitude of the greenhouse effect?
Slide 43
Warm-up #37 1. Describe the structure of a water molecule. 2.
Define specific heat. 3. Define density. 4. How do you determine if
a substance will float?
Slide 44
Warm-up #38 1. A water molecule has oppositely charged ends
making it __________. 2. Water molecules stick to each other by
_______ 3. Water molecules stick to other things by ______ 4.
_______makes water tougher on the top layer.
Slide 45
Warm-up #39 Copy and Answer. 1. ___________________ utilizes
the principles of ___________ and __________ to move water up
narrow, porous spaces. 2. Water molecules exhibit high adhesion to
substances that are ______________.
Slide 46
Warm-up #40 Copy and Answer 1. Cold water is ______ dense than
warm water so cold water will _________. 2. However, ice is ______
dense than liquid water so it will _________. 3. Evaporation is a
cooling process because of the high _________________ of water. 4.
Water has a high ____________ which allows it to absorb a great
deal of heat without drastically changing temperature.
Slide 47
Warm-up #41 1. Water covers about ____% of the planet, but only
about ____% is good for human consumption. 2. The ________________
describes the movement of water through different phases and
reservoirs. 3. The ______ provides the energy necessary to drive
the water cycle. 4. Sketch and label the water cycle.
Slide 48
Warm-up #42 1. ________________ is the amount of time that a
water molecule remains in a given reservoir. 2. Name 5 reservoirs
of water on earth. 3. A river basin is the _____ drained by a
_____. 4. A __________ is a smaller portion of land within a river
basin that drains into a stream or tributary before flowing into
the larger river.
Slide 49
Warm-up #43 Copy and Answer 1. The region where a river flows
into the ocean is a(n) _________. 2. A wetland with trees, bushes,
and shrubs is a _________. 3. We live in the _______ River Basin.
4. Lakes, streams and wetlands form when the ________________ is at
the surface.