biogeochem cycles
DESCRIPTION
Nitrogen & Phosphorus CyclesTRANSCRIPT
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Biogeochemical CyclesSept. 3rd-4th, 2013
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Biogeochemical Cycles:
Phosphorus Cycle
Nitrogen Cycle
Water Cycle
Carbon Cycle
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Nitrogen Cycle
Key Vocab Words:
Ammonia
Proteins
Denitrification
Nitrogen-fixation
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What is the purpose of the nitrogen cycle?
Our atmosphere is 78% nitrogen gas.
Animals and plants cannot directly use all the nitrogen found in our atmosphere.
Therefore, we need nitrogen-fixing bacteria to “capture” nitrogen and convert it to a usable form.
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Step 1: Atmospheric Nitrogen (N2)
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Step 2: Ammonification
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Step 3: Nitrification
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Step 4: Assimilation
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Phosphorus Cycle
Key Vocab Words:
Pollution
Basins
DNA
![Page 10: Biogeochem cycles](https://reader033.vdocument.in/reader033/viewer/2022061219/54b89a534a7959c9388b459f/html5/thumbnails/10.jpg)
What is the purpose of the nitrogen cycle?
Our atmosphere is 78% nitrogen gas.
Animals and plants cannot directly use all the nitrogen found in our atmosphere.
Therefore, we need nitrogen-fixing bacteria to “capture” nitrogen and convert it to a usable form.
![Page 11: Biogeochem cycles](https://reader033.vdocument.in/reader033/viewer/2022061219/54b89a534a7959c9388b459f/html5/thumbnails/11.jpg)
Step 1: Phosphate Added to soil
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Step 2: Phosphate is fixed & available
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Step 3: Plants take up phosphorus
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Step 4: Plants removed, cycle continues