Water Cycle
Nitrogen Cycle
Phosphorous Cycle
Carbon Cycle
100

Part of the cycle also known as rain.

What is precipitation?

100

Bacteria convert nitrogen into ammonia.

What is nitrogen fixation?

100

Phosphorous in the ground.

What is ground phosphorous?

100

Part of the cycle involving animals breathing.

What is respiration?

200

Surface of ocean warms up, some water turns to water vapor.

What is evaporation?

200

Ammonia is converted first into nitrite and then to nitrate.

What is nitrification?

200

Phosphorous is found in these.

What are rocks?

200

Plants take up atmospheric carbon during this.

What is photosynthesis?

300

Water vapor in the air accumulates into clouds.

What is condensation?
300

Plants absorb ammonia and nitrate.

What is assimilation?

300

Rocks break down.

What is adsorption?

300

The name for carbon underground.

What are fossil fuels?

400

Plants take up water from the soil and release it into the air as water vapor.

What is transpiration?

400

Bacteria converts nitrogen nutrients back into ammonia.

What is ammonification?

400

Dust landing on the soil.

What is deposition?

400

Uptake of carbon dioxide and release of oxygen in the chloroplast of a plant cell to create sugar.

What is the Calvin cycle?

500

Water being absorbed into the ground is ____, water sliding down to lakes and rivers is____.

What are infiltration and run-off?

500

Bacteria converts the ammonia back into nitrogen gas.

What is denitrification?

500

Phosphorous is released by animals. 

What is excretion/death?

500

Uptake of oxygen and release of water and carbon dioxide to process sugar in the mitochondria of animal cells.

What is the Kreb cycle?