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Published byShannon Randolph Chapman Modified over 6 years ago
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3-4 Ecosystem Recycling Water cycle- Cells contain 70-90% water for chemical reactions to occur. Carbon cycle- part of organic materials (glucose) that living things use for energy Nitrogen cycle- Nitrogen is used for the building of proteins (amino acids) and Nucleic acids.
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Water cycle
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Carbon Cycle
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Nitrogen cycle Nitrogen fixation=N2 into Nitrates (bacteria do this for plants to use) Ammonification=decomposers break down the Nitrogen in dead material into ammonia. Nitrification=Bacteria take up ammonia and oxidize into nitrates and nitrites (plants use this for amino acids) Denitrification=anaerobic bacteria break down nitrates and release N2 back in the atmosphere.
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Nitrogen Cycle
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