Nitrogen Cycle Questions

Identify the correct stages of the Nitrogen Cycle

a

b

c

d

Nitrification

Denitrification

Nitrogen Fixation

Ammonification

What organism fixes nitrogen in order for plants to use it?

• legume plants

• bacteria

• squirrels

• lightening

The nitrogen cycle take place ​ (a)  

• upper atmosphere
• in the digestive track of animals
• outer space
• in the soil

Which stage of the nitrogen cycle involves changing nitrites to nitrates?

• nitrogen fixation

• ammonification

• nitrification

• denitrification

Which stage of the nitrogen cycle involves changing atmospheric nitrogen into ammonium ions?

• nitrogen fixation

• ammonification

• nitrification

• denitrification

Which stage of the nitrogen cycle involves changing nitrates into atmospheric nitrogen?

• nitrogen fixation

• ammonification

• nitrification

• denitrification

Which stage of the nitrogen cycle involves breaking down organic waste and dead organisms?

• nitrogen fixation

• ammonification

• nitrification

• denitrification

​ (a)   is when too much nutrients and minerals enter a body of water and cause algae to grow out of control

• Eutrophication
• Photosynthesis
• Respiration
• Ammonification