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- 1. Multiple Choice
Where can you find carbon?
Only in Earth's atmosphere
Inside all water molecules
Inside the sun
Inside every living thing on Earth
- 2. Multiple Choice
How is the carbon cycle similar to the water cycle?
Both involve liquid substances falling to Earth from the atmosphere.
Neither process works at low temperatures.
Both involve the transfer of substances between animals, plants, and the Earth.
Both involve the transfer of substances between the earth and outer space.
- 3. Multiple Choice
How do animals add carbon dioxide to the
atmosphere?
Through breathing.
Through evaporation.
Through cellular respiration.
Through transpiration.
- 4. Multiple Choice
What organisms in the ocean absorb the most
carbon dioxide?
Algae and marine plants
Ocean mammals, like whales and dolphins
Fish
Coral
- 5. Multiple Choice
What is a carbon sink?
Something that adds carbon to the atmosphere
Something that removes carbon from the atmosphere
Something that adds carbon to the earth's crust
Something that removes carbon from the earth's crust
- 6. Multiple Choice
Which of these historical events led to a major
imbalance in the carbon cycle?
The American Civil War
The American Revolution
The Industrial Revolution
The French Revolution
- 7. Multiple Choice
Using fewer fossil fuels could help restore
equilibrium to the carbon cycle. What does
"equilibrium" mean?
Oxygen
Balance
Resources
Sinks
- 8. Multiple Choice
How does carbon become locked inside the earth?
Tree roots expel carbon into the soil as they grow
Humans use machines to pump carbon dioxide into large underground tanks
Rocks become richer in carbon as time goes on
The carbon-rich bodies of plants and animals decay into the earth after they die
- 9. Multiple Choice
How do carbon emissions lead to global warming?
By trapping the sun's heat in the atmosphere
By causing very hot volcanic eruptions
By catching fire within the atmosphere
By increasing the amount of carbon in the earth's
crust
- 10. Multiple Choice
Which of these is a factual statement about
carbon?
Humans use far too much carbon-based fuel
Carbon is the fourth-most abundant element in the universe
There is no relationship between carbon emissions and global climate change
Burning rainforests helps restore equilibrium to the carbon cycle
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