OBJECTIVES Oxygen Cycle Carbon Cycle Water Cycle Nitroge n Cycle REVIEW & QUIZ INTRODUCTION x CYCLES IN CYCLES IN NATURE NATURE Cycles in Nature Module 4 Module 4 Unit 2 Unit 2 Lesson 7 Lesson 7 Integrated Science Integrated Science BEGIN BEGIN
Transcript
1. OBJECTIVES Oxygen Cycle Carbon Cycle Water Cycle Nitrogen
Cycle REVIEW & QUIZ INTRODUCTION x CYCLES IN NATURECYCLES IN
NATURE Cycles in Nature Module 4Module 4 Unit 2Unit 2 Lesson
7Lesson 7 Integrated ScienceIntegrated Science BEGINBEGIN
2. OBJECTIVES Oxygen Cycle Carbon Cycle Water Cycle Nitrogen
Cycle REVIEW & QUIZ INTRODUCTION x CYCLES IN NATURECYCLES IN
NATURE Cycles in Nature Introductory Question Think about the
question Whats missing from the diagram below? Whats Missing? You
should be able to answer this question at the end of the
presentation.
3. OBJECTIVES Oxygen Cycle Carbon Cycle Water Cycle Nitrogen
Cycle REVIEW & QUIZ INTRODUCTION x CYCLES IN NATURECYCLES IN
NATURE Cycles in Nature INTRODUCTION This slide presentation looks
at cycles of various elements and compounds that are important for
the survival of living organisms within their environments. Oxygen,
Carbon and Nitrogen cycles are explored in this unit on the
Terrestrial Environment, but we will also briefly integrate the
Water cycle, which is taken from the next unit on the Aquatic
Environment, but well also explore it further in that unit. As you
go through these slides, reflect on the importance of these
inter-related cycles for the survival of living organisms and
Earth. You can access various subtopics in the Menu at the top of
the slide. 3
4. OBJECTIVES Oxygen Cycle Carbon Cycle Water Cycle Nitrogen
Cycle REVIEW & QUIZ INTRODUCTION x CYCLES IN NATURECYCLES IN
NATURE Cycles in Nature OBJECTIVES On completing this slide
presentation, you should be able to: 1.state what is meant by a
cycle in nature. 2.describe with annotated diagrams each of the
following cycles: oxygen, carbon, water and nitrogen. 3.discuss the
importance of each cycle to organisms in the terrestrial
environment. 4.search for information and share ideas. 4 NOTE: For
some activities, you will be asked to type your responses in boxes.
To do so, you must be in Slide Show View. You can enter and delete
text in the box in Slide Show View.
5. OBJECTIVES Oxygen Cycle Carbon Cycle Water Cycle Nitrogen
Cycle REVIEW & QUIZ INTRODUCTION x CYCLES IN NATURECYCLES IN
NATURE Cycles in Nature 1 - Cycles in Nature: Activity 1.1 The
condition we call life is sustained because of the interactions and
intra-actions occurring between biotic and biotic components in the
natural and the built environment. Question 1. Watch this video for
an overview of these interactions and to begin to understand why
various cycles are important.
http://www.youtube.com/watch?v=XJ6VtduDSyY&feature=relmfu
Question 2. From the video, how would you define a natural cycle?
5
6. OBJECTIVES Oxygen Cycle Carbon Cycle Water Cycle Nitrogen
Cycle REVIEW & QUIZ INTRODUCTION x CYCLES IN NATURECYCLES IN
NATURE Cycles in Nature 1 - Cycles in Nature: Activity 1.1 Question
2. From the video, how would you define a natural cycle? 6 In
nature, when things happen over and over again, involving
interactions between the same processes and/or components such as
living organisms and materials, we call that a natural cycle. Click
here for possible answers.
7. OBJECTIVES Oxygen Cycle Carbon Cycle Water Cycle Nitrogen
Cycle REVIEW & QUIZ INTRODUCTION x CYCLES IN NATURECYCLES IN
NATURE Cycles in Nature 1 - Cycles in Nature: Activity 1.1 Question
3. Listen to the song and read the words also, to find out what are
some cycles in nature, at > http://tinyurl.com/br3bcwd Question
4. What are the natural cycles mentioned in the song? 7 Answer to
4. Oxygen, Nitrogen and Water cyclesClick here for possible
answers.
8. OBJECTIVES Oxygen Cycle Carbon Cycle Water Cycle Nitrogen
Cycle REVIEW & QUIZ INTRODUCTION x CYCLES IN NATURECYCLES IN
NATURE Cycles in Nature 1 - Cycles in Nature: Activity 1.1 Question
5. Natural cycles are often referred to as biogeochemical cycles.
Explain the meaning. 8 Answer to 5. bio = plants, animals and
including bacteria. geo = rocks and soils; chemical = elements,
compounds. So, the term biogeochemical refers to cycles that
involve the continuous cycling of chemicals through both the biotic
and abiotic environments. Click here for possible answers.
9. OBJECTIVES Oxygen Cycle Carbon Cycle Water Cycle Nitrogen
Cycle REVIEW & QUIZ INTRODUCTION x CYCLES IN NATURECYCLES IN
NATURE Cycles in Nature 2 - The Oxygen Cycle Oxygen (a gas) is one
of the major components found in the atmosphere of the Earth. It
makes up over twenty percent of the Earth's atmosphere. 50% of the
Earth's crust is made up of oxygen. You never find oxygen floating
around as individual atoms. Oxygen is always with other elements.
and it is involved in many cycles. Oxygen cycles through Earths
environment in several forms. It can be dissolved in the air or in
water. Read about oxygen at >
http://www.geography4kids.com/files/cycles_oxygen.html 9
10. OBJECTIVES Oxygen Cycle Carbon Cycle Water Cycle Nitrogen
Cycle REVIEW & QUIZ INTRODUCTION x CYCLES IN NATURECYCLES IN
NATURE Cycles in Nature 2 - The Oxygen Cycle: What is Oxygen? 1.
Name 4 common compounds with oxygen. 10 Feedback: Example apart
from atmospheric oxygen = O2, we find oxygen as O3 = ozone; in CO2
= carbon dioxide, in H2O= water and in sugars = C6H12O6. During
respiration plants and animals use O2. It is returned to the air
and water as carbon dioxide(CO2). Through photosynthesis, plants
convert CO2 and H2O into carbohydrates, and oxygen is released.
Click here for possible answers.
11. OBJECTIVES Oxygen Cycle Carbon Cycle Water Cycle Nitrogen
Cycle REVIEW & QUIZ INTRODUCTION x CYCLES IN NATURECYCLES IN
NATURE Cycles in Nature 2 - The Oxygen Cycle: What is Oxygen? 2. Do
you recall the processes of photosynthesis and respiration? Write a
balanced chemical equation for each process. Write a word equation
below each. 11 Click here for possible answers.
12. OBJECTIVES Oxygen Cycle Carbon Cycle Water Cycle Nitrogen
Cycle REVIEW & QUIZ INTRODUCTION x CYCLES IN NATURECYCLES IN
NATURE Cycles in Nature 2 - The Oxygen Cycle The oxygen cycle is
the continuous cycling or circulation of oxygen through the
non-living environment and the biochemical processes that go on in
living animals and plants. (It) describes the movement of O2 within
the atmosphere within the biosphere and the lithosphere (Earth's
crust). The main driving factor of the oxygen cycle is
photosynthesis, which is responsible for the modern Earth's
atmosphere and life as we know it Respiration is also involved in
the cycling process. Ref.>
http://en.wikipedia.org/wiki/Oxygen_cycle 1. Click / watch this
video but pause it at 2.21 to look at the cycle>
http://www.youtube.com/watch?v=mUVX5rg1E0I 12
13. OBJECTIVES Oxygen Cycle Carbon Cycle Water Cycle Nitrogen
Cycle REVIEW & QUIZ INTRODUCTION x CYCLES IN NATURECYCLES IN
NATURE Cycles in Nature 2 - The Oxygen Cycle 2. Having paused the
video, carefully examine the oxygen cycle given at the end. Then
also, look back critically now at the second slide and say if that
diagram and the video diagram adequately represent the oxygen
cycle. 3. Decide within your group: Is anything missing in either
of the diagrams? 13 Feedback: They do not show that plants also
respire and use oxygen during respiration. 4. Now, check if the
cycle on the next slide more accurately reflects the cycling of
oxygen. Click here for possible answer.
14. OBJECTIVES Oxygen Cycle Carbon Cycle Water Cycle Nitrogen
Cycle REVIEW & QUIZ INTRODUCTION x CYCLES IN NATURECYCLES IN
NATURE Cycles in Nature 2 - The Oxygen Cycle 14 We can correctly
draw an oxygen cycle as below. Oxygen Respiration in animals
Respiration in plants Tell your teacher how this cycle differs from
the one on the slide 2! Is this one more/less accurate?
Explain!
15. OBJECTIVES Oxygen Cycle Carbon Cycle Water Cycle Nitrogen
Cycle REVIEW & QUIZ INTRODUCTION x CYCLES IN NATURECYCLES IN
NATURE Cycles in Nature 2 - The Oxygen Cycle - Why is Oxygen
needed? Oxygen is needed/used up or stored in sinks for all kinds
of processes that occur in organic/inorganic matter, e.g: 1.Living
plants and animals use oxygen for aerobic respiration all
throughout life to release the energy, stored in food, that they
require. Organisms take in/use up oxygen (and pass out carbon
dioxide). 2.The burning/combustion of fossil fuels/biomass, e.g.
coal, gas, oil, to release energy, requires/uses oxygen.
3.Processes such as the rusting/oxidation of metals uses oxygen.
4.The decomposition by bacteria of organic matter from dead
organisms is a process that uses oxygen. 15Go to slide 16.
16. OBJECTIVES Oxygen Cycle Carbon Cycle Water Cycle Nitrogen
Cycle REVIEW & QUIZ INTRODUCTION x CYCLES IN NATURECYCLES IN
NATURE Cycles in Nature 2 - The Oxygen Cycle: How is Oxygen
produced? Oxygen is produced (source).. 1.By Plants during the
process of photosynthesis, both land plants and phytoplankton use
carbon dioxide, the energy of sunlight, and water to create food
molecules in which energy is stored. In the process they also
create oxygen which is released into the air through the leaf
stomata. 2. By sunlight An additional source of atmospheric free
oxygen comes from photolysis, whereby high energy ultraviolet
radiation breaks down atmospheric water (vapour) and nitrous oxide
into component atoms. The free H and N atoms escape into space
leaving O2 in the atmosphere. 3.The weathering of rock also
releases oxygen to the air. 16
17. OBJECTIVES Oxygen Cycle Carbon Cycle Water Cycle Nitrogen
Cycle REVIEW & QUIZ INTRODUCTION x CYCLES IN NATURECYCLES IN
NATURE Cycles in Nature 3 - The Carbon Cycle: Activity 3.1 1. Watch
the video from the list on the next slide that has been assigned to
your group. 2. Based on the video, answer these questions: a.
Carbon cycles through the environment usually as a gas. What
percent of the air is carbon dioxide? b. What are the main sources
of carbon? c. How is carbon mainly used in the environment? d. What
is the Carbon cycle? e. Do humans influence or affect the carbon
cycle in any negative way? Explain. 17
18. OBJECTIVES Oxygen Cycle Carbon Cycle Water Cycle Nitrogen
Cycle REVIEW & QUIZ INTRODUCTION x CYCLES IN NATURECYCLES IN
NATURE Cycles in Nature 3 - Activity 3.1: Question 1
http://www.youtube.com/watch?v=U3SZKJVKRxQ&feature=relat
http://www.youtube.com/watch?v=C-lcEXI7al4&feature=related
http://www.youtube.com/watch?v=Q0-Vj4CQrJ8&feature=relate Read
the text/watch the animation on pages 1 4 from >
http://www.bbc.co.uk/schools/gcsebitesize/science/ocr_gatewa
http://www.youtube.com/watch?v=0Vwa6qtEih8
http://www.youtube.com/watch?v=xV3rYB79lcU&feature=relate
https://www.youtube.com/watch?v=nzImo8kSXiU 18
19. OBJECTIVES Oxygen Cycle Carbon Cycle Water Cycle Nitrogen
Cycle REVIEW & QUIZ INTRODUCTION x CYCLES IN NATURECYCLES IN
NATURE Cycles in Nature 3 - Activity 3.1: Question 2a 19 Feedback
to 2. a) CO2 = 0.03% See pie chart at right. Questions 2. a) Carbon
cycles through the environment usually as a gas. What percent of
the air is carbon dioxide? Click here for possible answer.
20. OBJECTIVES Oxygen Cycle Carbon Cycle Water Cycle Nitrogen
Cycle REVIEW & QUIZ INTRODUCTION x CYCLES IN NATURECYCLES IN
NATURE Cycles in Nature Question 2 b) What are the main sources of
CO2? 3 - Activity 3.1: Question 2b 20 Feedback to 2 b) Sources of
CO2 Respiration by animals and plants produces carbon dioxide which
is released into the atmosphere as a by-product. Release from
volcanoes, hot springs and geysers and carbonate rocks also
contribute to atmospheric carbon dioxide. Combustion e.g. fires and
in engines release the carbon dioxide that was stored in fossil
fuels back into the atmosphere. Click here for possible
answer.
21. OBJECTIVES Oxygen Cycle Carbon Cycle Water Cycle Nitrogen
Cycle REVIEW & QUIZ INTRODUCTION x CYCLES IN NATURECYCLES IN
NATURE Cycles in Nature 3 - Activity 3.1: Question 2c Question 2 c)
How is carbon mainly used in the environment? 21 NEXT QUESTIONNEXT
QUESTION Feedback to 2c) Use of CO2 = One quarter of the
atmospheric CO2 is used up by plants, algae and certain bacteria in
photosynthesis where it becomes part of carbohydrate substances.
Absorption of another quarter occurs into large water bodies such
as oceans/seas. Click here for possible answer.
22. OBJECTIVES Oxygen Cycle Carbon Cycle Water Cycle Nitrogen
Cycle REVIEW & QUIZ INTRODUCTION x CYCLES IN NATURECYCLES IN
NATURE Cycles in Nature 3 - Activity 3.1: Question 2d Question 2d)
What is the Carbon cycle? 22 NEXT QUESTIONNEXT QUESTION Feedback to
2 d) The Carbon cycle is a complex series of processes through
which all of the carbon atoms in existence rotate or are circulated
between the biotic and abiotic components of the terrestrial and
aquatic environments. Ref.>
http://library.thinkquest.org/11226/why.htm Click here for possible
answer.
23. OBJECTIVES Oxygen Cycle Carbon Cycle Water Cycle Nitrogen
Cycle REVIEW & QUIZ INTRODUCTION x CYCLES IN NATURECYCLES IN
NATURE Cycles in Nature 3 - Activity 3.1: Question 2e Question 2e)
Do humans influence or affect the carbon cycle in any negative way?
Explain. 23 23 NEXT QUESTIONNEXT QUESTION 2. e) Carbon dioxide is a
greenhouse gas and it traps heat in the atmosphere. Without it and
other greenhouse gases, Earth would be a frozen world. But humans
have burned so much fuel that there is about 30% more carbon
dioxide in the air today than there was about 150 years ago, and
Earth is becoming a warmer place. In fact, ice cores show us that
there is now more carbon dioxide in the atmosphere than there has
been in the last 420,000 years. Ref. >
http://eo.ucar.edu/kids/green/cycles6.htm Click here for possible
answer.
24. OBJECTIVES Oxygen Cycle Carbon Cycle Water Cycle Nitrogen
Cycle REVIEW & QUIZ INTRODUCTION x CYCLES IN NATURECYCLES IN
NATURE Cycles in Nature 3 - Activity 3.1: Question 3 3. Make a
labeled diagram of the Carbon Cycle. 4. Report to the class when
called on. 24 Feedback to 3. Look at the diagram on the next slide
to determine if your diagram shows these processes, organisms and
materials. Click here for possible answer.
25. OBJECTIVES Oxygen Cycle Carbon Cycle Water Cycle Nitrogen
Cycle REVIEW & QUIZ INTRODUCTION x CYCLES IN NATURECYCLES IN
NATURE Cycles in Nature 3 - Activity 3.1: Questions 5 & 6 5.
From the quality of the information that each group was able to
access and report on, do you think all websites are equally useful
for searching for information? Explain to your teacher. 6. How can
you decide the best website from which to get content information?
25 Feedback 5. No. All websites do not give comprehensive enough
information. 6. One should search several websites and compare the
information given at each. Click here for possible answer.
26. OBJECTIVES Oxygen Cycle Carbon Cycle Water Cycle Nitrogen
Cycle REVIEW & QUIZ INTRODUCTION x CYCLES IN NATURECYCLES IN
NATURE Cycles in Nature 3: The Carbon Cycle 26
27. OBJECTIVES Oxygen Cycle Carbon Cycle Water Cycle Nitrogen
Cycle REVIEW & QUIZ INTRODUCTION x CYCLES IN NATURECYCLES IN
NATURE Cycles in Nature 4 - The Water (Hydrologic) cycle 27 Examine
the diagram of the Water cycle. Note the processes.
28. OBJECTIVES Oxygen Cycle Carbon Cycle Water Cycle Nitrogen
Cycle REVIEW & QUIZ INTRODUCTION x CYCLES IN NATURECYCLES IN
NATURE Cycles in Nature 4 - The Water Cycle 1. What chemical
processes are involved in the Water Cycle? 2. Green land plants are
involved in one of those three processes, and it is named on the
diagram. What is the process? 3. What is the importance of
infiltration of precipitation into the soil and also ground water
storage? 4. What form does precipitation take? 28
29. OBJECTIVES Oxygen Cycle Carbon Cycle Water Cycle Nitrogen
Cycle REVIEW & QUIZ INTRODUCTION x CYCLES IN NATURECYCLES IN
NATURE Cycles in Nature 4 - The Water Cycle Feedback to Questions:
1.The processes are: precipitation, infiltration into soil,
evaporation, transpiration, run-off and condensation. 2.Green land
plants are involved in transpiration. 3.Water will seep into the
soil spaces and remain there to be available for absorption by
plants to be used in photosynthesis and other life processes. It
also can percolate into springs and other water bodies and form
habitats for organisms and also evaporate and re-enter the water
cycle. 4.Precipitation can be liquid water , i.e rain, or it can be
snow. 29
30. OBJECTIVES Oxygen Cycle Carbon Cycle Water Cycle Nitrogen
Cycle REVIEW & QUIZ INTRODUCTION x CYCLES IN NATURECYCLES IN
NATURE Cycles in Nature 5 - The Nitrogen Cycle Most of the nitrogen
found in any terrestrial environment came initially from the
atmosphere, where it forms about 78% of the atmosphere. But, while
nitrogen is crucial for any life on Earth, most of this atmospheric
nitrogen cannot be used directly by either plants or animals.
Nitrogen gas must be converted or fixed to other forms to be useful
for higher plants and animals. This happens in the nitrogen cycle.
Watch this explanation of processes/ organisms involved in cycling
nitrogen through its various forms so that plants and animals an
can use it> http://www.youtube.com/watch?v=372K0jyO0hQ 30
31. OBJECTIVES Oxygen Cycle Carbon Cycle Water Cycle Nitrogen
Cycle REVIEW & QUIZ INTRODUCTION x CYCLES IN NATURECYCLES IN
NATURE Cycles in Nature 31 Nitrogen Fixation by Lightning, Examine
the diagram of the Nitrogen cycle. Note the processes. 5 - The
Nitrogen Cycle - Diagram
32. OBJECTIVES Oxygen Cycle Carbon Cycle Water Cycle Nitrogen
Cycle REVIEW & QUIZ INTRODUCTION x CYCLES IN NATURECYCLES IN
NATURE Cycles in Nature 5 - Processes involved in the Nitrogen
cycle The main processes of the nitrogen cycle are: 32
Ammonification - When plants and animals die, various bacteria and
fungi decompose these dead organisms and also animal wastes, into
NH4OH, i.e. they cause decay. Denitrification - anaerobic bacteria
break down nitrates (NO3- ) into nitrogen gas (N2) Nitrification -
bacteria change ammonium (NH4+ ) into nitrites (NO2- ) then into
nitrates (NO3- ). Nitrogen fixation - bacteria living in the root
nodules of legumes, convert nitrogen gas (N2) into organic
compounds that plants can use. The energy of lightning and also
industrial processes can also fix atmospheric nitrogen gas i.e.
atmospheric oxygen and nitrogen combine to form nitrate ions.
33. OBJECTIVES Oxygen Cycle Carbon Cycle Water Cycle Nitrogen
Cycle REVIEW & QUIZ INTRODUCTION x CYCLES IN NATURECYCLES IN
NATURE Cycles in Nature SUMMARY Watch this video and listen
carefully, and reflect on whether and how your activities impact
either positively or negatively the various cycles youve learned
about and ultimately the environment.
https://www.youtube.com/watch?v=dDBU0lg-HYE
https://www.youtube.com/watch?v=LbBgPekjiyc 33
34. OBJECTIVES Oxygen Cycle Carbon Cycle Water Cycle Nitrogen
Cycle REVIEW & QUIZ INTRODUCTION x CYCLES IN NATURECYCLES IN
NATURE Cycles in Nature REVIEW & QUIZ Are you ready to test
yourself? There are REVIEW Activities and multiple choice (M.C.)
items that you are required to answer. For each M.C. item, click on
the letter of the correct response and then click the button NEXT
QUESTION to continue. Click the green BEGIN QUIZ button to start.
34 34 BEGIN QUIZ!
35. OBJECTIVES Oxygen Cycle Carbon Cycle Water Cycle Nitrogen
Cycle REVIEW & QUIZ INTRODUCTION x CYCLES IN NATURECYCLES IN
NATURE Cycles in Nature REVIEW Activity 1 - The Oxygen Cycle 1.
Which two main processes keep O2 cycling in our environment? 35
Feedback: Respiration and photosynthesis. Click here for possible
answer.
36. OBJECTIVES Oxygen Cycle Carbon Cycle Water Cycle Nitrogen
Cycle REVIEW & QUIZ INTRODUCTION x CYCLES IN NATURECYCLES IN
NATURE Cycles in Nature 36 REVIEW Activity 1 - The Oxygen Cycle 2.
Look at the diagram on the right and write a brief description of
the Oxygen cycle. Click to see answers.
37. OBJECTIVES Oxygen Cycle Carbon Cycle Water Cycle Nitrogen
Cycle REVIEW & QUIZ INTRODUCTION x CYCLES IN NATURECYCLES IN
NATURE Cycles in Nature REVIEW Activity 1 - The Oxygen Cycle
Feedback to Question 2. Write a brief description of the Oxygen
cycle. Oxygen is always present in the atmosphere/air. Some is
formed when sunlight splits atmospheric water (called photolysis)
to release oxygen. Most oxygen comes from green terrestrial plants,
and also from aquatic plants and phytoplankton that give off oxygen
during photosynthesis. Land plants and animals absorb atmospheric
oxygen and use it during respiration, and, like land organisms,
aquatic organisms also use oxygen (dissolved in the water) for
respiration Apart from its use in respiration, oxygen is also used
in processes of oxidation e.g. rusting of metals and in fires, as
well as in decomposition of organic material when animals and
plants die. 37 37
38. OBJECTIVES Oxygen Cycle Carbon Cycle Water Cycle Nitrogen
Cycle REVIEW & QUIZ INTRODUCTION x CYCLES IN NATURECYCLES IN
NATURE Cycles in Nature REVIEW Activity 2 Changed by lightning,
industrial activities and by bacteria Atmospher ic nitrogen In the
box below, write the name of this cycle and processes numbered 1-6.
3 6 5 4 1 2 Click to see answers.
39. OBJECTIVES Oxygen Cycle Carbon Cycle Water Cycle Nitrogen
Cycle REVIEW & QUIZ INTRODUCTION x CYCLES IN NATURECYCLES IN
NATURE Cycles in Nature REVIEW Activity 2 - Answers Changed by
lightning, industrial activities and by bacteria Atmospher ic
nitrogen Name of this cycle: Nitrogen Cycle 3 6 5 4 1 2 1 =
absorption & assimilation; 2 = denitrification; 3 = digestion;
4 = nitrification; 5 = nitrogen fixation; 6 = ammonification
40. OBJECTIVES Oxygen Cycle Carbon Cycle Water Cycle Nitrogen
Cycle REVIEW & QUIZ INTRODUCTION x CYCLES IN NATURECYCLES IN
NATURE Cycles in Nature REVIEW Activity 3 a) Type the name of this
cycle in the box: b) Type the name of the process occurring at each
numbered stage. 40 Feedback: 4 a)The Water or Hydrologic cycle. 4
b) 1. = Condensation; 2. = Evaporation; 3. = Precipitation.Click
here for answers.
41. OBJECTIVES Oxygen Cycle Carbon Cycle Water Cycle Nitrogen
Cycle REVIEW & QUIZ INTRODUCTION x CYCLES IN NATURECYCLES IN
NATURE Cycles in Nature QUIZ: M.C Question 1 Click the letter that
shows the statement or phrase which most correctly completes this
statement: In the water cycle, the conversion of liquid water to a
gaseous form of water called water vapor is __________ . 41 41 B.
photosynthesis D. condensation C. transpiration A. evaporation
FEEDBACKFEEDBACK
42. OBJECTIVES Oxygen Cycle Carbon Cycle Water Cycle Nitrogen
Cycle REVIEW & QUIZ INTRODUCTION x CYCLES IN NATURECYCLES IN
NATURE Cycles in Nature QUIZ: M.C Question 1 Feedback to M.C.
Question 1: The conversion of liquid water to a gaseous form of
water called water vapor is A = evaporation is correct. The word
vapour should have given you a clue to the answer! Check the
Glossary in your SIM to find the meaning of the other three words,
if you are not certain of them or if you got this question wrong.
42 NEXT QUESTIONNEXT QUESTION
43. OBJECTIVES Oxygen Cycle Carbon Cycle Water Cycle Nitrogen
Cycle REVIEW & QUIZ INTRODUCTION x CYCLES IN NATURECYCLES IN
NATURE Cycles in Nature QUIZ: M.C. Question 2 Click the letter that
shows the statement or phrase which most correctly completes this
statement: Decomposers are important in the terrestrial environment
because 43 43 A. they convert energy into sugars and release carbon
dioxide. B. they consume energy from producers and produce large
volumes of carbon dioxide. C. they produce energy from sunlight. D.
they convert wastes into inorganic components for producers to use.
FEEDBACKFEEDBACK
44. OBJECTIVES Oxygen Cycle Carbon Cycle Water Cycle Nitrogen
Cycle REVIEW & QUIZ INTRODUCTION x CYCLES IN NATURECYCLES IN
NATURE Cycles in Nature Quiz: M.C. Question 2 Feedback to M.C.
Question 2 : Decomposers are important in the terrestrial
environment because D. they convert wastes into inorganic
components for producers to use. D is correct earlier, when looking
at soil biota, you learned about the important role of decomposers,
such as bacteria, protozoa and fungi, in breaking down and decaying
dead organic material in or on the soil. They use some of the
materials for their own life processes e.g. to get energy, and
other materials are released into soil and recycled as nutrients
which plants can absorb. 44 44 NEXT QUESTIONNEXT QUESTION
45. OBJECTIVES Oxygen Cycle Carbon Cycle Water Cycle Nitrogen
Cycle REVIEW & QUIZ INTRODUCTION x CYCLES IN NATURECYCLES IN
NATURE Cycles in Nature QUIZ: M.C. Question 3 Click the letter that
shows the statement or phrase which most correctly completes this
statement: If plants are to use nitrogen, it must be_____. 45 45 A.
converted to oxygen. D. spilt into two atoms. C. released into the
atmosphere by animals. B. fixed by bacteria. FEEDBACKFEEDBACK
46. OBJECTIVES Oxygen Cycle Carbon Cycle Water Cycle Nitrogen
Cycle REVIEW & QUIZ INTRODUCTION x CYCLES IN NATURECYCLES IN
NATURE Cycles in Nature Quiz: M.C. Question 3 Feedback to M.C.
Question 3: If plants are to use nitrogen, it must be B. fixed by
bacteria. B is correct - Remember youve learned that plants cannot
use free atmospheric nitrogen, so processes of nitrification
convert or fix it. Bacteria oxidize NH4OH to produce nitrites then
nitrates and plants can then absorb the nitrates and use it during
photosynthesis. 46 46 NEXT QUESTIONNEXT QUESTION
47. OBJECTIVES Oxygen Cycle Carbon Cycle Water Cycle Nitrogen
Cycle REVIEW & QUIZ INTRODUCTION x CYCLES IN NATURECYCLES IN
NATURE Cycles in Nature End of Activity You have reached the end of
the slide set and Quiz activities. If you wish to review any of the
concepts in this lesson, go to the first slide and click on the
topic. If you have finished viewing the slides for this lesson,
click the Close (X) button. 47 47
48. OBJECTIVES Oxygen Cycle Carbon Cycle Water Cycle Nitrogen
Cycle REVIEW & QUIZ INTRODUCTION x CYCLES IN NATURECYCLES IN
NATURE Cycles in Nature CREDITS All retrieved on-line 9th November
2012 http://water.me.vccs.edu/concepts/oxycycle.html
http://www.gov.mb.ca/conservation/sustain/cycle.pdf
http://www.geography4kids.com/files/cycles_oxygen.html
http://en.wikipedia.org/wiki/Phytoplankton
http://en.wikipedia.org/wiki/Photolysis
http://en.wikipedia.org/wiki/Oxygen_cycle
http://www.fossweb.com/resources/pictures/488256817.html
http://en.wikipedia.org/wiki/File:Photosynthesis_equation.svg
http://simple.wikipedia.org/wiki/Cellular_respiration
http://www.exploringnature.org/db/detail.php?dbID=27&detID=1186
http://www.bbc.co.uk/schools/gcsebitesize/science/ocr_gateway_pre_2011/rocks
_metals/6_clean_air1.shtml
http://eo.ucar.edu/kids/green/cycles6.htm
http://en.wikipedia.org/wiki/File:Water_cycle.png
http://en.wikipedia.org/wiki/Nitrogen_cycle
http://extension.missouri.edu/publications/DisplayPub.aspx?P=WQ252
48
49. OBJECTIVES Oxygen Cycle Carbon Cycle Water Cycle Nitrogen
Cycle REVIEW & QUIZ INTRODUCTION x CYCLES IN NATURECYCLES IN
NATURE Cycles in Nature CREDITS All retrieved on-line 9th November
2012 http://www.kidsgeo.com/geography-for-kids/0159-the-
carbon-cycle.php
http://littlemiros.files.wordpress.com/2014/02/captura.jpg 49
50. OBJECTIVES Oxygen Cycle Carbon Cycle Water Cycle Nitrogen
Cycle REVIEW & QUIZ INTRODUCTION x CYCLES IN NATURECYCLES IN
NATURE Cycles in Nature QUICK QUIZ - Equations 50 50 Feedback to
Question 2: Write a balanced chemical equation for each process.
Write a word equation below each. Equation for photosynthesis:
Carbon dioxide and water combine using light energy to form sugar
and oxygen Equation for respiration: C6H12O6 + 6O2 6CO2 + 6H2O +
Energy Glucose and Oxygen combine to give Carbon dioxide and Water
and Energy