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Nitrogen Cycle: True or False

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Nitrogen Cycle: True or False

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About this activity

Test your knowledge of the nitrogen cycle.

Created by

Bismelis M Martinez
Bismelis M Martinez
Dominican Republic

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Nitrogen Cycle: True or False
 

Nitrogen Cycle: True or FalseOnline version

Test your knowledge of the nitrogen cycle.

by Bismelis M Martinez
1

Nitrogen cycle involves both biotic and abiotic processes.

2

Nitrification is a two-step process converting ammonium to nitrite then nitrate.

3

Plants uptake nitrate and ammonium for growth (assimilation).

4

Ammonification decomposes organic nitrogen to ammonium.

5

Denitrification often occurs in waterlogged or anaerobic soils.

6

Lightning fixes N2 directly into nitrate without intermediary steps.

7

Nitrification is the microbial oxidation of ammonium first to nitrite (NO2-) and then to nitrate (NO3-).

8

Denitrification releases oxygen into the soil.

9

Nitrogen fixation converts N2 gas into ammonia in soil or roots.

10

Denitrification returns nitrogen to the atmosphere as N2 or N2O.

11

Denitrification increases soil nitrate levels.

12

Plants absorb nitrogen mainly in the form of nitrate (NO3-) or ammonium (NH4+).

13

Denitrification is the reduction of nitrate to nitrogen gas (N2) or nitrous oxide (N2O) under anaerobic conditions.

14

Nitrogen mineralization converts organic nitrogen into nitrate directly.

15

Nitrogen fixation converts N2 to ammonia (NH3) or ammonium (NH4+).

16

Plants fix atmospheric nitrogen directly in leaves.

17

Excessive nitrate from fertilizers can lead to water pollution (eutrophication).

18

The nitrogen cycle ends when nitrogen is fixed by bacteria.

19

Ammonia is produced during nitrification.

20

Most atmospheric nitrogen is readily usable by most crops.

 
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