The nitrogen cycle

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9 Terms

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What are the 4 stages of the nitrogen cycle?

1) Nitrogen fixation. 2) Ammonification. 3) Nitrification. 4) Denitrification.

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What is nitrogen fixing?

When the unreactive nitrogen is taken from the air and made a bit more reactive through lightning, the Haber process or bacteria.

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What is ammonification?

Bacteria break down amino acids from dead animals and wastes into ammonium.

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What is nitrification?

When nitrifying bacteria turn the ammonia into nitrite which is then turned into nitrate.

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What is nitrite?

NO2

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What is nitrate?

NO3

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What is ammonium?

NH4+

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What is nitrogen?

NO2

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What is denitrification?

Converts the nitrates in the soil to atmospheric nitrogen, replenishing the atmosphere.