Nitrogen Cycle

What is the sink in the Nitrogen Cycle?

What takes the nitrogen out of the atmosphere and turns it into a useable form?

What are the usable forms of nitrogen?

What are the names of the usable forms of nitrogen?

How do the useable forms of nitrogen get to plants?

How do the useable forms of nitrogen get to animals?

If plants and animals decompose, can the nitrogen be returned back to it's useable forms.

If plants and animals decompose, the nitrogen will also be converted back to useable forms.

The bacteria that take nitrogen out of the sink are called "Nitrogen Fixing Bacteria".

What are the bacteria that turn nitrogen back into the unusable form(N2)?

Nitrogen Fixing Bacteria and plants aren't in a symbiotic relationship.

Why is Nitrogen important to living organisms?