Understanding the Carbon Cycle

What percentage of living matter is made up of carbon compounds?

• 18%

• 25%

• 10%

• 5%

What is the symbol for carbon?

• Ca

• C

• Co

• Cn

Which form of carbon is the hardest naturally occurring substance?

• Diamond

• Coal

• Graphite

• Charcoal

What process do plants use to convert carbon dioxide into nutrients?

• Photosynthesis

• Combustion

• Respiration

• Decomposition

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NGSS.MS-LS1-6

Which process releases oxygen into the atmosphere?

• Decomposition

• Combustion

• Respiration

• Photosynthesis

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NGSS.MS-LS1-6

How is carbon transferred from plants to animals?

• By consuming plants

• Through water

• Via sunlight

• Through soil

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NGSS.MS-LS1-6

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What happens to carbon when plants, animals, or humans die?

• It decays and becomes part of the earth

• It is released as oxygen

• It forms diamonds

• It evaporates

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What role do oceans play in the carbon cycle?

• They transform carbon into oxygen

• They only release carbon

• They absorb and release carbon

• They have no role

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What is the effect of carbon as a greenhouse gas?

• It traps heat, causing global warming

• It has no effect

• It increases oxygen levels

• It cools the earth

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Why is planting trees recommended?

• To increase land value

• To reduce oxygen levels

• To produce more carbon dioxide

• To absorb carbon dioxide and combat global warming

Tags

NGSS.MS-LS1-6

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