Nitrogen Cycle Review

Front

Where is the majority of nitrogen found?

Back

atmosphere

Front

Nitrogen makes up _____ of the atmosphere.

Back

78%

Front

Nitrogen is used to produce...

Back

both DNA & proteins

Front

Free nitrogen is converted into a usable form through this process...

Back

nitrogen fixation

Front

The majority of nitrogen fixation happens when _____ convert atmospheric nitrogen (N₂) into ammonia (NH₂)

Back

fungi

Front

Ammonia is toxic to plants. The ammonia must be converted into a more useful form by ___ in the soil.

Back

bacteria

Front

The process by which bacteria convert ammonia into nitrates for plants to uptake...

Back

nitrification

Front

When a plant or animal dies, decomposers convert the nitrogen back into...

Back

ammonium

Front

Which process is responsible for converting nitrates back into nitrogen gas?

Back

denitrification

Front

What is the primary role of legumes in the nitrogen cycle?

Back

to fix nitrogen