Nitrogen Cycle

Question 1

How much of the atmossphere is nitrogen?

Answer 1

78%

Question 2

What is The process when nitrogen is combined with oxygen for organisms that cannot use regular nitrogen?

Answer 2

Nitrogen fixation

Question 3

Why is nitrogen fixation important?

Answer 3

Because it is a building block of amino acids used to make proteins for new cells and tissue

Question 4

Soil contains bacteria that converts nitrogen into what?

Answer 4

Ammonium

Question 5

Other soil bacteria called ______ bacteria take ammonia and convert it to____[__] and then____[___] which plants absorb nitrogen is then passed through the _____

Answer 5

Nitrifying
Nitrites(NO3)
Nitrates(NO4)
Food chain

Question 6

In water what convert nitrogen to ammonium for plants?

Answer 6

Cyanobacteria

Question 7

How do humans convert nitrogen into ammonia and nitrates?

Answer 7

With high pressure and temperature to manufacture fertilizers

Question 8

Where is denitrifying bacteria found and what do they do?

Answer 8

Found in waterlogged soil and convert nitrates back to nitrogen

Question 9

In sustainable ecosystems where is excess nitrogen stored?

Answer 9

In rocks [lithosphere]

Question 10

Run off from fertilizers causes algal blooms blocking____from hitting water, plants begin to die and___ accumulates the floor. ________ bacteria increase, taking oxygen from the fish, they die, depth____and Lake eventually disappears

Answer 10

Light
Detritus
Decomposing
Decreases