Nitrogen and hydrological cycle — task. Science State Board, Class 9.

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Arrange correctly the steps involved in the process of nitrogen cycle:

Answer variants:

Conversion of inert

$N_2$ to reactive compounds by cyanobacteria

Plants and animals incorporate nitrate and ammonia to make proteins

Ammonia is oxidised to soluble nitrites and nitrates

Reduction of nitrate ions

$NO_3^-$ to the gaseous

$N_2$

Conversion of organic

$N_2$ into ammonia

Step 1:

$⇓$

Step 2:

$⇓$

Step 3:

$⇓$

Step 4:

$⇓$

Step 5:

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11. Nitrogen and hydrological cycle