The Nitrogen Cycle
- Created by: Caitlin Ward
- Created on: 20-04-14 14:11
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- The Nitrogen Cycle
- Nitrogen is recycled in the air
- The atomosphere contains 78% nitrogen gas
- Nitrogen is needed for making proteins for growth
- Plants get their nitrogen from the soil
- Nitrogen in the air has to be turned into nitrates before the plant can use it
- Nitrogen compounds are passed along food chains and webs
- Decomposers break down proteins into ammonia
- This returns the nitrogen compounds to the soil
- Nitrogen fixation is the process of turning N2 in the air ointo nitrogen compounds which plants can use
- Lightning - The energy allows nitrogen to react with oxygen
- Nitrogen fixing bacteria in the soil
- Some live in soil but others live in nodules on the roots of legume plants
- They have a mutualistic relationship
- Bacteria gets food from the plant
- The plant gets nitrogen compounds
- They have a mutualistic relationship
- Some live in soil but others live in nodules on the roots of legume plants
- 4 Types of Bacteria involved in the Nitrogen Cycle:
- Decomposers
- Decompose proteins and urea and turn them into ammonia
- Nitrifying bacteria
- Turns ammonia into nitrates
- Nitrogen - fixing bacteria
- Turns N2 into nitrogen compounds that plants can use
- Some live in soil but others live in nodules on the roots of legume plants
- They have a mutualistic relationship
- Bacteria gets food from the plant
- The plant gets nitrogen compounds
- They have a mutualistic relationship
- Nitrogen fixing bacteria in the soil
- Denitrifying bacteria
- Turns nitrates into N2 gas
- Decomposers
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