Biology 20: Energy and Matter: Nitrogen Cycle and Phosphorus Cycle

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Last updated 5:45 AM on 6/13/26
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11 Terms

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Nitrification

The conversion of ammonia into nitrites and nitrates by bacteria

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Phosphorus Cycle

The movement of phosphorus through soil, water, and organisms

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Phosphate

The usable form of phosphorus for plants

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Nitrogen Cycle

The movement of nitrogen through air, soil, and living things

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Assimilation

Plants absorb nitrates, and animals get nitrogen by eating plants

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Ammonification

Decomposers return ammonia to the soil from dead matter

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Denitrification

Bacteria convert nitrates back into nitrogen gas

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Fertilizer

A substance added to soil to replace nutrients and improve growth

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Algal Bloom

Rapid algae growth caused by excess nutrients in water

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Nitrogen Fixation

The process that changes nitrogen gas into ammonia

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