AnswersGA-GSE Biology AThe Importance of Carbon

The Importance of Carbon Answers

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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.
3

What is stored in carbon bonds?

A
water
B
energy
C
glucose
D
ATP
4

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.
5

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.
6

By which process are fossil fuels formed?

A
burning
B
photosynthesis
C
decomposition
D
cellular respiration
7

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?

Question illustration
A
22 ppm
B
32 ppm
C
45 ppm
D
51 ppm
8

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.
9

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
10

Which pair of molecules both contain carbon atoms?

A
fats and proteins
B
water and carbohydrates
C
nucleic acids and water
D
oxygen gas and fats
11

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.
12

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

A
hydrogen
B
glucose
C
carbon
D
protein
13

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.
14

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.

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