Understanding the Carbon Cycle

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

• Respiration

• Transpiration

• Fermentation

• Photosynthesis

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What gas do animals release during respiration?

• Oxygen

• Nitrogen

• Carbon dioxide

• Hydrogen

How do plants contribute to the carbon cycle?

• Plants do not play a role in the carbon cycle.

• Plants absorb CO2 only at night.

• Plants release oxygen during decomposition.

• Plants contribute to the carbon cycle by absorbing CO2 during photosynthesis and releasing it back through respiration and decomposition.

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What is the primary role of photosynthesis in the carbon cycle?

• To release oxygen into the atmosphere.

• To convert atmospheric carbon dioxide into organic matter.

• To decompose organic matter into carbon dioxide.

• To absorb sunlight for energy storage.

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NGSS.MS-LS1-6

Name one way carbon is stored in forests.

• In tree biomass

• In soil moisture

• In the atmosphere as CO2

• In water bodies like rivers and lakes

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What is the impact of deforestation on carbon storage?

• Deforestation has no impact on carbon storage or atmospheric carbon levels.

• Deforestation improves carbon storage by promoting tree growth.

• Deforestation decreases carbon storage, increasing atmospheric carbon levels.

• Deforestation increases carbon storage, reducing atmospheric carbon levels.

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How does burning fossil fuels affect the carbon cycle?

• Burning fossil fuels only affects the water cycle, not the carbon cycle.

• Burning fossil fuels increases atmospheric CO2, disrupting the carbon cycle and contributing to climate change.

• Burning fossil fuels decreases atmospheric CO2, helping the carbon cycle.

• Burning fossil fuels has no impact on the carbon cycle.

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What is a carbon sink?

• A carbon sink is a reservoir that absorbs and stores carbon dioxide from the atmosphere.

• A carbon sink is a type of carbon-based fuel.

• A carbon sink is a process that releases carbon dioxide into the atmosphere.

• A carbon sink is a machine that converts carbon into energy.

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How do oceans contribute to the carbon cycle?

• Oceans have no impact on the carbon cycle whatsoever.

• Oceans absorb and store carbon dioxide, support marine photosynthesis, and facilitate the biological carbon pump.

• Oceans release carbon dioxide into the atmosphere during storms.

• Oceans only store carbon in the form of solid minerals.

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What human activities increase carbon dioxide levels in the atmosphere?

• Burning fossil fuels, deforestation, industrial processes, and agricultural practices.

• Recycling materials

• Planting more trees

• Using renewable energy sources