2C Nitrogen cycle Formative

Front

Which nitrogen cycle process converts atmospheric nitrogen to a soil form usable by plants?

Back

nitrogen fixation

Front

Organisms that break down dead plants & animals and release nitrogen back into atmosphere...

Back

bacteria

Front

If the atmosphere is 78% N₂, why can't we just get our nitrogen by breathing?

Back

We have no mechanism to break the triple bond of nitrogen between the atoms.

Front

What process returns nitrogen from plants and animals back into the atmosphere and soil?

Back

decomposition

Front

What needs to happen so that two nitrogen molecules in the atmosphere separate?

Back

Lightning

Front

From what location do plants absorb nitrogen? Options: Water, Air, Soil, Animals

Back

Soil

Front

How can Nitrogen gas (N₂) be fixed into a usable form for plants?

Back

Through the action of bacteria and lightning

Front

A correct path that Nitrogen could take would be...
Options: Air--> Animals--> Plants--> Bacteria, Air--> Bacteria--> Plants--> Animals, Bacteria--> Animals--> Plants--> Air, Plants--> Air--> Animals--> Bacteria

Back

Air--> Bacteria--> Plants--> Animals

Front

Which process in the nitrogen cycle converts soil nitrate to nitrogen gases N₂O and N₂ by bacteria?

Back

Denitrification

Front

What is the most abundant gas in the atmosphere?

Back

Nitrogen