Question

the nitrogen cycle diagram
name:
directions: color in the features in the nitrogen cycle diagram. use the word bank to label the diagram.
word bank
ammonium (nh4+)
assimilation
atmospheric nitrogen (n2)
decomposers
denitrifying bacteria
lightning fixation
nitrates (no3-)
nitrifying bacteria
nitrites (no2-)
nitrogen - fixing bacteria

Explanation:

The nitrogen - cycle involves several key processes and components. Atmospheric nitrogen ($N_2$) can be fixed by lightning or nitrogen - fixing bacteria. Ammonification converts organic nitrogen to ammonium ($NH_4^+$). Nitrification by nitrifying bacteria converts ammonium to nitrites ($NO_2^-$) and then to nitrates ($NO_3^-$). Plants take up these nitrogen - containing compounds through assimilation. Decomposers break down organic matter. Denitrifying bacteria convert nitrates back to atmospheric nitrogen in denitrification.

Answer:

From top - left and moving clockwise:

1. atmospheric nitrogen ($N_2$)
2. lightning fixation
3. nitrates ($NO_3^-$)
4. denitrifying bacteria
5. denitrification
6. ammonium ($NH_4^+$)
7. nitrites ($NO_2^-$)
8. nitrifying bacteria
9. nitrification
10. nitrogen - fixing bacteria
11. assimilation
12. decomposition
13. decomposers
14. ammonification