SC.8.L.18.3: Carbon Cycle

Which statement best describes the movement of carbon in the carbon cycle?

• Carbon moves through many paths and can return to the same reservoir.

• Carbon moves in one direction and is eventually destroyed.

• Carbon only moves through living organisms.

• Carbon follows one fixed path and does not return to the same place.

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

How do herbivores contribute to the carbon cycle?

• By taking in carbon from plants and releasing CO₂ through respiration

• By releasing carbon only through decomposition

• By producing fossil fuels

• By absorbing carbon dioxide directly from the air

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NGSS.MS-LS2-3

What happens to carbon when animals produce waste?

• It is taken in by decomposers and returned to the soil and air

• It stays permanently in the animal

• It is destroyed

• It moves directly into the atmosphere

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NGSS.MS-LS2-3

Which statement best explains how excess carbon dioxide affects Earth?

• It increases greenhouse gases that trap heat

• It stops photosynthesis

• It increases oxygen levels

• It escapes into space

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NGSS.MS-ESS3-5

The carbon cycle is:

• a process by which carbon is exchanged between the atmosphere, land, and ocean

• a method of producing carbon-based fuels

• a cycle that only occurs in plants

• a process that only involves the ocean

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NGSS.MS-ESS2-1

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Carbon "sinks" are:

• natural systems that absorb more carbon than they release

• artificial reservoirs that store carbon

• areas with high carbon emissions

• technological devices that capture carbon

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NGSS.HS-ESS2-6

NGSS.HS-LS2-5

Which processes contribute to the removal of carbon dioxide from the atmosphere?

• Photosynthesis, ocean absorption, and soil sequestration

• Photosynthesis, volcanic eruptions, and fossil fuel burning

• Ocean absorption, deforestation, and industrial emissions

• Soil sequestration, deforestation, and volcanic eruptions

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NGSS.MS-LS1-6

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What are carbon “sources”?

• Processes that release carbon dioxide into the atmosphere

• Natural reservoirs that store carbon

• Technologies that capture carbon emissions

• Organisms that consume carbon dioxide

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NGSS.MS-LS1-6

What are 3 ways carbon re-enters the atmosphere?

• Through photosynthesis, respiration, and combustion

• Through respiration, decomposition, and combustion

• Through photosynthesis, decomposition, and fossilization

• Through combustion, fossilization, and photosynthesis

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

What are 2 ways in which humans can upset the balance of the carbon cycle?

• Burning fossil fuels and deforestation

• Recycling and conservation

• Planting trees and using solar energy

• Using electric cars and wind power

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NGSS.MS-ESS3-4