Biogeochemical cycles

Cellular Respiration and photosynthesis are components of the _________________ cycle

• carbon

• nitrogen

• water

T/F: Plants and animals cannot use Nitrogen from the atmosphere, it needs to be converted into a different form first.

• True

• False

_________________________ is when bacteria in root nodules of legumes convert nitrogen from the atmosphere into ammonia.

• Nitrogen Fixation

• Nitrification

• Denitrification

When plants take in nitrites and nitrates from the soil, this process is called

• Nitrogen Fixing

• Assimilation

• Denitrification

The process where bacteria in the soil break down nitrites and nitrates and release nitrogen back into the atmosphere is called....

• nitrogen fixation

• ammonification

• denitrification

Evaporation of water from plants is called...

• condensation

• transpiration

• precipitation

Decomposers break down dead organisms and release the nitrogen back into the ecosystem as ammonium...

• precipitation

• legumes

• ammonification

Surface water on land that is eventually carried back to an ocean or lake is called

• transpiration

• evaporation

• run-off

Transpiration and Evaporation are when water turn from liquid to

• gas (vapor)

• solid

• liquid

Which is NOT a way that carbon returns to the atmosphere?

• combustion

• respiration

• evaporation