1
This type of nitrogen fixation occurs when energy from lightning breaks N2 molecules apart and they combine with oxygen forming N2O.
2
Humans damage the nitrogen cycle by creating ______ ____
3
Most nitrogen fixation happens by
4
The process where N2 molecules in the air break apart and combine with other atoms to form ammonia
5
Bacteria that live in deep, damp sediments provides the service of ________ to return nitrogen to the atmosphere
6
The decay process includes _______
7
Nitrates formed by bacteria combining ammonia, oxygen, and nitrogen are part of the ______________ process
8
Green plants that have absorbed nitrates, then are eaten by consumers, is an example of _____
9
A consequence of too much nitrogen fixing in our water sources is
10
Bacteria that lives in the roots of plants and fixes bacteria is an example of
11
When bacteria in the ground combine with ammonia and oxygen ________ are formed
12
In industrial fixation, N2 combines with with H2 to form______.
13
The ___________ is the largest reservoir for nitrogen
