carbon cycle
water cycle
nitrogen cycle
phosphorus cycle
100

what is the ocean?

the main regulator of CO2 in the atmosphere, CO2 easily dissolves in it.

100

What is evaporation?

The process by which liquid turns into gas

100

What percent of our atmosphere is made up of nitrogen gas?

78%

100

Where can some of the phosphorus and soils be washed into?

Water basins

200

What process do animals use to make more CO2?

Respiration

200

What is condensation?

Process by which gas turns into liquid

200

What is dentrification?

Bacteria in the soil can break down the ammonia into the gaseous form of nitrogen, which is not available for  use by plants or animals.

200

Where is phosphorous mainly contained in?

Rocks and minerals

300

What is a natural source for CO2?

Volcanoes

300

What is precipitation?

Liquid/frozen water that falls back down to the earth’s surface

300

Animals and plants cannot directly use all the nitrogen found in the…?

Atmosphere

300

What is another source that contains phosphorus?

Man-made pollution

400

When there is too much CO2 in the air, may be responsible for what effect?

Greenhouse effect

400

What is the order in which the water cycle occurs?

Evaporation to condensation to precipitation

400

Animal waste decay by the action of bacteria, which create what, that are rich in nitrogen and useful for plants to use again?

Ammonia and nitrate

400

What is the result of too much phosphorus in the water?

Leads to plant overgrowth, which hurts other life forms in water

500

What produces carbon?

Geological activity and burning of froests and fossil fuels produce carbon

500

Where does the water come from that evaporates?

Oceans, lakes, and streams

500

What is the bacteria called that can directly use nitrogen in our atmosphere and fix it so other organisms can benefit?

Nitrogen fixing bacteria

500

What is phosphorus useful for?

Fertilizer

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