B1 - The Nitrogen Cycle

A quick summary on how nitrogen is passed between living organisms and the environment and why.

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How much nitrogen is in the air?
78%
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What does the nitrogen cycle show?
How the element nitrogen moves between the environment and living organisms
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Why do plants need nitrogen?
To form amino acids to build up proteins
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In which form can plants only take in nitrogen?
Nitrogen compounds such as nitrates
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Why can plants not take in nitrogen as a gas to make proteins?
Because nitrogen gas is so unreactive
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What is the role of nitrogen-fixing bacteria?
To convert nitrogen gas into nitrates
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Where is nitrogen-fixing bacteria found? (2 possible answers)
In the soil and in the root nodules of plants
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Describe the steps of the Haber process
Nitrogen gas is converted into ammonia and nitrifying bacteria converts it into nitrates
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What is the role of decomposers in the nitrogen cycle?
to break down urea and egested material as well as the bodies of dead organisms
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What results in the urea and egested material by being broken down?
The nitrogen returns to the soil as ammonia
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What does the nitrifying bacteria do?
Nitrifying bacteria converts ammonia into nitrates
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What does denitrifying bacteria do?
Denitrifying bacteria break down nitrates into nitrogen gas, which is then returned to the air (in waterlogged soil conditions)
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Can lightning convert nitrogen gas into nitrates?
Yes
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Other cards in this set

Card 2

Front

What does the nitrogen cycle show?

Back

How the element nitrogen moves between the environment and living organisms

Card 3

Front

Why do plants need nitrogen?

Back

Preview of the front of card 3

Card 4

Front

In which form can plants only take in nitrogen?

Back

Preview of the front of card 4

Card 5

Front

Why can plants not take in nitrogen as a gas to make proteins?

Back

Preview of the front of card 5
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Comments

/Lucas/Austin/

This is incredibly helpful, just want to say thanks for the help! I definitely recommend this resource

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