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Nat5 Nitrogen cycle

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Question
Answer
What is a nitrogen cycle?   A process by which nitrogen is recycled between the air, plants, animals and the soil.  
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Why is nitrogen important?   It is necessary to make protein.  
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Name a stage that does not involve bacteria in the nitrogen cycle   eating/absoprtion  
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What controls the nitrogen cycle?   Three types of bacteria  
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What do nitrogen fixing bacteria do?   Convert nitrogen gas into protein  
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Where are nitrogen fixing bacteria found?   In the soil OR root nodules  
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What do denitrifying bacteria do?   convert nitrate into nitrogen gas/air  
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Which part of the nitrogen cycle does not involve bacteria?   Animals eating plants (food chain)  
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What substance are dead plants and animals broken down into?   Ammonia  
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Organisms that break down dead animals/plants are   Decomposers  
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Decomposers include   fungi and bacteria  
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What do nitrifying bacteria do?   Convert ammonia into nitrite and then into nitrate  
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Which is the only two step process in nitrogen cycle?   Nitrification  
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What is absorption   Plants take up nitrate by their roots and use it to make protein  
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