Download Worksheet Nitrogen Cycle

NAME: ___________________________________________DATE: _______BLOCK: ___
Use the overhead to fill in the blanks. Then answer the questions on the back of the
page.
QUESTIONS
1. In what form (solid, liquid, or gas) is nitrogen found in the atmosphere?
2. In what form can plants actually use nitrogen?
3. When animals or plants die, which organisms breakdown (by decomposition) the protein
from the dead animals or plants into amino acids?
4. Identify the reactants (inputs) and products (outputs) of nitrifying bacteria.
5. Nitrite is converted to nitrate by which organisms?
6. What are the 2 possible fates of nitrates in the soil? In other words, where can nitrate go?
Hint: follow the arrows…
7. In a legume, in what part of the plant is nitrogen converted into usable nitrate?
8. What do denitrifying bacteria do?
9. What can farmers do to prevent nitrate deficiency?
10. How is the nitrogen cycle an example of commensalism or mutualism? Explain your
answer.