Biogeochemical Cycles

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What is a biogeochemical cycle?

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A biogeochemical cycle is the movement of elements and compounds through living organisms and the physical environment, involving biological, geological, and chemical processes.

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What is the carbon cycle?

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The carbon cycle is the process by which carbon is exchanged between the atmosphere, land, water, and living organisms, including processes like photosynthesis, respiration, and decomposition.

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How do plants contribute to the carbon cycle?

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Plants absorb carbon dioxide from the atmosphere during photosynthesis, converting it into organic matter.

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What is nitrogen fixation?

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Nitrogen fixation is the process of converting atmospheric nitrogen (N2) into a form that plants can use, primarily done by certain bacteria and lightning.

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What role do bacteria play in the nitrogen cycle?

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Bacteria are essential for nitrogen fixation and nitrification, converting nitrogen into forms that plants can absorb.

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What is the significance of decomposers in biogeochemical cycles?

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Decomposers break down dead organic matter, returning nutrients to the soil and making them available for plants.

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What is a renewable resource?

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A renewable resource is a natural resource that can be replenished naturally over time, such as sunlight, wind, and water.

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What is a non-renewable resource?

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A non-renewable resource is a natural resource that cannot be replenished within a human timescale, such as fossil fuels.

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What is cellular respiration?

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

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How does burning fossil fuels affect the carbon cycle?

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Burning fossil fuels releases carbon dioxide into the atmosphere, increasing greenhouse gas concentrations and impacting climate change.