Nitrogen Cycle

bacteria or lightning

What way can nitrogen become "fixed" or made more useful.

Precipitation, runoff, and surface water

What are some ways nitrogen can enter our water?

Denitrifying

What type of bacteria release nitrogen into our atmosphere

fertilizer

Why is nitrogen used on crops?

eating plants

How are animals able to obtain nitrogen?

nitrogen cycle

This picture represents the?

Decomposition

When a plant or animal dies, decomposers like fungi break down the matter in a process known as

Nitrification

ammonia and bacteria that produce nitrite or nitrates

nitrogen gas (N2)

Most of the atmosphere is composed of

nitrogen gas

Plants cannot absorb ____ ___. Instead, they must absorb it in a solid, compound form in their roots.

nitrogen-fixing bacteria

What helps converts nitrogen gas into nitrogen compounds that plants can use?

Denitrification

____ - the process by which certain bacteria in the soil (or water) break down nitrogen compounds (NO3) to release nitrogen gas into the atmosphere.

Nitrogen

78% of the atmosphere

Oxygen

21% of the atmosphere