AnswersFL-2001340-Environmental Science BHuman Impact on the Environment

Week 5: The Importance of Carbon Answers

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Look at the levels of carbon dioxide in the data table below.Carbon in the AtmosphereBy how much did carbon dioxide levels increase from 1980 to 2000?

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A
22 ppm
B
32 ppm
C
45 ppm
D
51 ppm
2
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Which statement best illustrates why carbon is so important to life on Earth?

A
Carbon occurs as a solid, a liquid, and a gas.
B
Carbon is found in both the living and nonliving worlds.
C
Carbon is stored in large quantities in fossil fuels.
D
Carbon-based macromolecules are found in living things.
3

What would most likely happen to the carbon cycle if there were no more plants on Earth?

A
Animals would consume more carbon.
B
More carbon would be released from fossil fuels.
C
Carbon would build up in the atmosphere.
D
Animals would perform more photosynthesis.
4

The table below shows the level of carbon dioxide in the atmosphere for a period of 50 years.Carbon Dioxide LevelWhat conclusion can you make about how the carbon dioxide level has changed over time?

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A
The level has not changed.
B
The level of CO2 has declined.
C
The level of CO2 has risen.
D
The level has reached its maximum.
5

By which process are fossil fuels formed?

A
burning
B
photosynthesis
C
decomposition
D
cellular respiration
6

What happens when humans burn fossil fuels?

A
Carbon is released into the atmosphere.
B
Carbon is removed from the atmosphere.
C
Carbon is added to the the carbon cycle.
D
Carbon is destroyed.
7

What is the primary function of the carbon cycle?

A
recycling the supply of carbon on Earth
B
creating macromolecules
C
recycling the supply of water on Earth
D
creating fossil fuels
8

Which action would most likely increase the amount of carbon in the environment?

A
choosing to burn coal to generate electricity
B
using energy-efficient appliances in place of older, traditional appliances
C
reusing shopping bags instead of using disposable plastic bags
D
recycling paper and plastic instead of throwing it in the trash
9

How will the level of carbon in the atmosphere change if humans do nothing to reduce their impact on the carbon cycle?

A
Carbon will be removed from the atmosphere altogether.
B
The level of carbon in the atmosphere will decrease.
C
Carbon in the atmosphere will remain the same.
D
The level of carbon in the atmosphere will increase.
10

What is stored in carbon bonds?

A
water
B
energy
C
glucose
D
ATP

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