Carbon in the Global Ecosystem

What have scientists discovered about the Earth's atmosphere?

• It is composed mainly of nitrogen and oxygen.

• It is shrinking rapidly.

• It is composed mainly of hydrogen and helium.

• It is expanding rapidly.

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NGSS.HS-ESS3-5

What is the main cause of the increase in carbon dioxide in the atmosphere as shown in the photograph?

• Burning of fossil fuels

• Deforestation

• Volcanic eruptions

• Solar activity

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NGSS.HS-ESS2-6

According to the graph, how has the level of atmospheric CO2 changed from 1960 to 2020?

• It has increased significantly.

• It has decreased significantly.

• It has remained stable.

• It has fluctuated without a clear trend.

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NGSS.HS-ESS2-6

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The potential effects of increased carbon dioxide in the atmosphere include:

• Global warming and climate change

• Decreased plant growth

• Reduction in ocean acidity

• Increased biodiversity

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NGSS.HS-ESS2-6

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The carbon that makes up carbon dioxide in the atmosphere comes from:

• fossil fuels

• volcanic eruptions

• respiration of living organisms

• all of the above

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NGSS.HS-ESS2-6

NGSS.HS-LS2-5

Fossil fuels are:

• renewable energy sources

• non-renewable energy sources

• a type of mineral

• a form of nuclear energy

Fossil fuels are the remains of plants and animals that died millions of years ago and were buried before they could decompose. True or False?

• True

• False

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NGSS.HS-ESS1-6

Fill in the blank: Burning fossil fuels releases large amounts of _______ into the air.

• carbon dioxide

• oxygen

• nitrogen

• hydrogen

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NGSS.HS-ESS2-6

The carbon cycle is a process that involves the movement of carbon through the atmosphere, oceans, soil, and living organisms. What is the carbon cycle?

• A process involving the movement of carbon through various Earth systems

• A cycle that only involves the atmosphere

• A process that only occurs in oceans

• A cycle that is unrelated to living organisms

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NGSS.HS-ESS2-6

NGSS.HS-LS2-5

Carbon moves in a cycle within Earth's ecosystem through processes such as photosynthesis, respiration, decomposition, and combustion.

• True

• False

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NGSS.HS-LS2-5

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