Nitrogen cycle

Front

What % of the air is made of nitrogen?

Back

78%

Front

Is the nitrogen in the atmosphere in the right form for living things to use?

Back

False

Front

What can transform nitrogen in the atmosphere into a usable form of nitrogen?

Back

lightning

Front

What is the role of denitrifying bacteria?

Back

Change nitrate back into nitrogen gas.

Front

Round structures on the roots of certain plants

Back

nodules

Front

What is the role of decomposing bacteria in the nitrogen cycle?

Back

Return the nitrogen compounds to the soil

Front

We need nitrogen to make: proteins, enzymes, cells, or all of these?

Back

all of these

Front

Burning fossil fuels releases this into the air: nitrous oxide, nitrate, nitrogen gas (N2), methane

Back

nitrous oxide

Front

What does the color green indicate on the map?

Back

There was an excess of nitrogen fertilizer in the soil.