Carbon Cycle

Carbon is added to the atmosphere in many different ways. Which of the following is NOT a way that carbon moves into the atmosphere?

• photosynthesis

• respiration

• decomposition

• combustion

After an organism dies, its body is broken down. Some of the carbon stored in its body is released into the atmosphere. The rest of the carbon stored in its body is slowly converted into fossil fuels. When these fossil fuels are used by humans, the carbon is released. During which process are the fossil fuels used by humans?

• Photosynthesis

• Respiration

• Combustion

• Decomposition

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NGSS.MS-LS2-3

There are about 200 trees per acre in the Amazon rainforest. This makes the Amazon rainforest one of the most densely forested patches of land on earth. If most of the trees in the rainforest were cut down, how would the atmosphere in that area be affected?

• The atmosphere would not change.

• There would be an decrease in the amount of oxygen in the atmosphere.

• The atmosphere would get much cooler.

• There would be an increase in the amount of oxygen in the atmosphere.

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NGSS.MS-ESS3-4

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

In what way does the human body return carbon to the atmosphere?

• Respiration

• Combustion

• Decomposition

• Transpiration

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NGSS.MS-ESS2-1

NGSS.MS-LS2-3

Where can you find carbon?

• Only in Earth’s atmosphere

• Inside all water molecules

• Only in the ground

• Inside every living thing on Earth

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NGSS.MS-LS2-3

Where does carbon begin in the carbon cycle?

• In humans

• In the atmosphere

• In the ground

• There is no beginning because it is a cycle.

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NGSS.MS-LS1-6

Which of the following best describes the impact of cellular respiration on the carbon cycle?

• Cellular respiration moves carbon from living things into the atmosphere.

• Cellular respiration moves carbon from the geosphere into the atmosphere.

• Cellular respiration moves carbon from the atmosphere into living things.

• Cellular respiration moves carbon from the atmosphere into the geosphere.

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NGSS.HS-LS2-5

The carbon cycle can best be described as a model of the movement of carbon between which of the following?

• the different cells of plants in the environment

• living and nonliving sources in the environment

• fossil fuels and human beings in the environment

• water and living organisms in the environment

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NGSS.MS-LS2-3

The diagram below shows parts of the carbon cycle. Which arrow represents the movement of carbon caused by cellular respiration?

• A

• B

• C

• D

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NGSS.MS-LS2-4

Scientists in the island country of Singapore conducted long-term testing which showed that the amount of carbon dioxide in the atmosphere above their country was increasing. Which of the following actions would most likely help reduce the amount of carbon dioxide in the atmosphere?

• Decrease the number of trees and other plants in their country.

• Increase the population of animals in their country.

• Decrease the combustion of fossil fuels in their country.

• Increase the temperature of the atmosphere in their country.

Tags

NGSS.MS-ESS3-4