Carbon & Nitrogen

Front

What is the primary reason humans cannot use nitrogen gas (N2) from the atmosphere?

Back

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

Front

True or False: We can breathe in nitrogen from the air and use it just like we use oxygen.

Back

False

Front

What percentage of the atmosphere is composed of nitrogen gas?

Back

78%

Front

Which statement is true regarding the relationship between humans and plants?

Back

Humans depend on oxygen, plants depend on carbon dioxide.

Front

Is the average temperature of Earth rising?

Back

True

Front

What is the chemical formula for nitrogen gas?

Back

N2

Front

What process do plants use to convert carbon dioxide into oxygen?

Back

Photosynthesis

Front

What is the role of legumes in the nitrogen cycle?

Back

They fix atmospheric nitrogen into a form usable by plants.

Front

What is the main greenhouse gas produced by human activities?

Back

Carbon dioxide (CO2)

Front

What is the significance of the carbon cycle?

Back

It regulates the flow of carbon among the atmosphere, oceans, soil, and living organisms.