AnswersGA-GSE Biology AThe Importance of Carbon

The Importance of Carbon Answers

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1
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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.
2
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Which reason best explains why carbon is able to form macromolecules?

A
Carbon is a very large element.
B
Carbon can bond with many elements.
C
Carbon is found in all living things.
D
Carbon is found in energy-storing molecules.
3

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.
4

Which substance is considered a building block for all living things?

A
hydrogen
B
glucose
C
carbon
D
protein
5

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?

Question illustration
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.
6

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
7

Which reason best explains why living things need carbon?

A
Carbon bonds are a source of energy.
B
Carbon levels reduce global temperatures.
C
Carbon acts as an important solvent.
D
Carbon is everywhere.
8

What would most likely happen to life on Earth if the carbon cycle stopped?

A
Life would continue unchanged.
B
Life would cease to exist.
C
Only plants would be affected.
D
Only animals would be affected.
9

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
10

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.

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