PCS Unit 9: Carbon Cycle

All of the carbon in existence is continually recycled in the carbon cycle

• True
• False

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if there is a fire in a forest, there will be less _ in the environment?

• nitrogen
• oxygen

oxygen is a gas produced by _ and used by  _ 

• plants and animals 
• photosynthesis and carbon dioxide 
• animals and plants 
• carbon dioxide and photosynthesis

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Which of the following removes carbon from the atmosphere?

• Combustion
• Respiration
• Photosynthesis
• Death

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Organisms that do not decompose can be buried and become what?

• water
• nutrients
• air
• fossil fuels

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Which process converts carbon in the form of sugar into carbon dioxide gas?

• Bioremediation
• Photosynthesis
• Respiration
• Transpiration

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How is the carbon cycle similar to the water cycle?

• Both involve liquid substances falling to the Earth from the atmosphere?

• Neither process works at low temperature.

• Both involve the transfer of substances between animals, plants, and the Earth.

• Both involve the transfer of substances between the earth and outer space.

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Combustion is another word for __________.

• Transportation
• Respiration
• Fossil Fuels
• Burning

True or false. Carbon dioxide is a greenhouse gas.

• True

• False

In what process is Carbon transformed into chemical energy?

• Photosynthesis
• Respiration
• Primary Production
• Secondary Production

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