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Carbon Cycle
Test Description: Carbon Cycle
Instructions: Answer all questions to get your test result.
1) Which of the following is NOT part of the carbon cycle?
A
Carbon is released when fossil fuels are burned.
B
Carbon dioxide is absorbed by plants during photosynthesis.
C
Animals emit carbon dioxide when they respire.
D
Deforestation causes more carbon to be absorbed by producers.
2) Plants and trees join in the carbon cycle in a couple of ways. Which one will take carbon out of the atmosphere?
A
by absorbing water through their roots
B
by dying and decomposing into the earth making fossil fuels
C
by completing photosynthesis
D
by transpiration
3) During the carbon cycle, in what form are carbon atoms generally returned to the atmosphere?
A
carbon dioxide
B
water
C
carbohydrates
D
carbon monoxide
4) Carbon dioxide is used to make sugars (chemical energy) in which step of the carbon cycle?
A
respiration
B
combustion
C
photosythesis
D
evaporation
5) Humans increase carbon dioxide in the atmosphere, and contribute to the carbon cycle by
A
using more solar power electricity
B
combustion from driving cars
C
planting trees
D
using alternative forms of energy instead of fossil fuels
6) How are humans influencing the amount of carbon in the carbon cycle?
A
By removing carbon dioxide from the atmosphere through cellular respiration.
B
By releasing carbon dioxide to the atmosphere through photosynthesis.
C
Humans are not influencing the amount of carbon dioxide in the atmosphere.
D
By adding carbon dioxide to the atmosphere through the burning of fossil fuels.
7) How does carbon enter the atmosphere in the carbon cycle?
A
burning fossil fuel
B
decomposition of organisms
C
cellular respiration
D
cellular respiration, burning fossil fuels, decomposition
8) How does deforestation affect the carbon cycle?
A
It causes herbivores get carbon from animals instead of plants
B
Deforestation causes carbon to enter the soil, which helps autotrophs get the carbon dioxide they need for photosynthesis
C
Trees take in carbon dioxide through photosynthesis, so there will be too much carbon dioxide in the atmosphere
D
Cutting down trees doesn't affect the carbon cycle, only the water cycle
9) How is cellular respiration related to the carbon cycle?
A
Autotrophs produce carbon dioxide to help heterotrophs do photosynthesis
B
Carbohydrates are passed from producers to consumers
C
Carbon dioxide is produced when we break down glucose to release ATP
D
Cellular respiration is not part carbon cycle
10) What is the role of decomposers in the carbon cycle?
A
Decomposers take in oxygen and releases carbon dioxide into the air and waste into the soil.
B
Decomposers provides energy for the plants to make food.
C
Decomposers take in carbon dioxide and release oxygen.
D
Decomposers break down wastes and the bodies of dead things, returning carbon dioxide into the environment.
11) Through food chains, the carbon that is in plants moves to the animals that eat them. When an animal eats another animal, carbon is ___________________.
A
destroyed
B
absorbed
C
transferred
D
released
12) How does the carbon in grass become part of a lion?
A
The lion eats the grass
B
The lion breathes in carbon given out by the plant
C
Carbon from grass doesn't end up in a lion.
D
Carbon is passed through the food chain
13) Combustion is another word for __________.
A
Fossil Fuels
B
Respiration
C
Burning
D
Transportation
14) Which of the following is an example of fossil fuels?
A
water
B
solar
C
wood
D
coal
15) Which of the following is a macromolecule that contains carbon?
A
water
B
nitrogen dioxide
C
carbohydrates
D
soil
16) What kind of organism takes out the most of the carbon from the atmosphere?
A
Bacteria
B
Animals
C
Plants
D
Humans
17) Which of the following macromolecules is not organic?
A
lipids
B
carbohydrates
C
water
D
protein
18) C6H12O6 is also known as glucose (a carbohydrate). Where is it found?
A
autotrophs
B
autotrophs and heterotrophs
C
abiotic factors
D
heterotrophs
19) Why does too much carbon dioxide in the atmosphere cause climate change?
A
Blocks out UV rays
B
Lets light escape to outer space
C
Traps more heat and warms planet
D
It cools our planet
*select an answer for all questions
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