The Nitrogen Cycle Flashcards

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1
Q

Define nitrification:

A

The process by which ammonium compounds are converted into nitrites and nitrates

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2
Q

Define denitrification

A

The conversion of nitrates to nitrogen gas

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3
Q

Define nitrogen fixation

A

The incorporation of nitrogen gas into organic nitrogen containing compounds

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4
Q

What are the 3 ways nitrogen can be fixed?

A
  • lightning
  • fixation by microorganisms
  • production of ammonia by the Haber process
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5
Q

Where do denitrifying bacteria get the oxygen needed for respiration?

A

From nitrates

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6
Q

What do denitrifying bacteria release as a waste product?

A

Nitrogen gas

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7
Q

In what form do plants take up nitrogen?

A

Nitrates

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8
Q

Define ammonification

A

The conversion of nitrogen compounds in dead organic matter or waste into ammonium compounds by decomposers

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