Carbon and Nitrogen Cycle

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Last updated 8:15 AM on 6/5/26
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6 Terms

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Stages of the carbon cycle

photosynthesis, respiration, decomposition, combustion (and fossilisation as relevant)

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<p>Stages of the nitrogen cycle</p>

Stages of the nitrogen cycle

nitrogen fixation → nitrification → assimilation → decomposition → denitrification; roles: fixing bacteria, nitrifying bacteria, decomposers, denitrifiers

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Nitrogen fixation

turning N2 from the air into nitrogen compounds in the soil, by lightning and nitrogen fixing bacteria

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Nitrification

ammonium ions in decaying matter turning to nitrates

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denitification

bacteria turns nitrate ions back into nitrogen

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assimilation

organisms absorb nitrogen compounds to build organic compounds like amino acids