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 photosynthesis?

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Photosynthesis is the process by which green plants and some other organisms use sunlight to synthesize foods with the help of chlorophyll, converting carbon dioxide and water into glucose and oxygen.

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What is denitrification?

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Denitrification is the process by which bacteria convert nitrates in the soil back into nitrogen gas (N2), releasing it into the atmosphere.

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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 absorb and use, typically through the action of certain bacteria.

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What is ammonification?

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Ammonification is the process of converting organic nitrogen from dead plants and animals into ammonia (NH3) by decomposers.

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What is runoff in the context of biogeochemical cycles?

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Runoff is the movement of water, often carrying dissolved nutrients like nitrogen, from land into bodies of water, which can lead to pollution.

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What is the formula for atmospheric nitrogen?

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The formula for atmospheric nitrogen is N2.

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What role do legumes play in the nitrogen cycle?

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Legumes, such as alfalfa and soybeans, host nitrogen-fixing bacteria in their root nodules, which convert atmospheric nitrogen into a usable form for plants.

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What is the impact of combustion of fossil fuels on carbon dioxide levels?

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Combustion of fossil fuels increases the amount of carbon dioxide in the atmosphere, contributing to climate change.

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What is assimilation in the nitrogen cycle?

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Assimilation is the process by which plants and animals incorporate nitrogen from the soil into their biological tissues.