3.2 Carbon Cycle

Front

What is the carbon cycle?

Back

The carbon cycle is the process by which carbon is exchanged between the Earth's atmosphere, land, oceans, and living organisms. It involves processes such as photosynthesis, respiration, decomposition, and combustion.

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What is a carbon sink?

Back

A carbon sink is a natural or artificial reservoir that accumulates and stores carbon-containing chemical compounds for an indefinite period. Examples include forests, oceans, and soil.

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What is a carbon source?

Back

A carbon source is any process or activity that releases carbon into the atmosphere. Examples include fossil fuel combustion, deforestation, and respiration.

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How does photosynthesis affect the carbon cycle?

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Photosynthesis is a process where plants absorb carbon dioxide from the atmosphere and convert it into glucose, thus reducing the amount of carbon dioxide in the atmosphere.

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What role do oceans play in the carbon cycle?

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Oceans absorb carbon dioxide from the atmosphere, helping to regulate the concentration of carbon in the atmosphere and playing a crucial role in the carbon cycle.

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What is the significance of decomposition in the carbon cycle?

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Decomposition is the process by which dead organic matter is broken down, releasing carbon back into the atmosphere and soil, thus contributing to the carbon cycle.

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What is cellular respiration?

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Cellular respiration is the process by which living organisms convert glucose and oxygen into energy, releasing carbon dioxide as a byproduct.

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What is the difference between a carbon sink and a carbon source?

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A carbon sink absorbs and stores carbon, while a carbon source releases carbon into the atmosphere.

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How does fossil fuel combustion impact the carbon cycle?

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Fossil fuel combustion releases large amounts of carbon dioxide into the atmosphere, increasing greenhouse gas concentrations and contributing to climate change.

Front

What is a reservoir in the context of the carbon cycle?

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A reservoir is a storage location for carbon, similar to a carbon sink, where carbon is held for long periods.