Water Cycle
Nitrogen Cycle
Carbon Cycle
Phosphorus Cycle
100

The way water falls to the earth.

What is precipitation?

100

The percentage of nitrogen gas in the atmosphere.

What is 78%?

100

What too much CO2 in the atmosphere can be responsible for.

What is the greenhouse effect?

100

Not found in the free state in nature, rather contained in rocks and minerals.

What is phosphorous?


200

The place where surface runoff leads to.

What is the role of bodies of water?

200

The three factors in the Nitrogen cycle.

What are biological, human, and physical/chemical?

200

The main regulator if CO2 due to it being easily dissolved in it.

What is the ocean?

200

Often caused by too much phosphorous in water.

What is overgrowth?

300

Water that seeps into the ground.

What is groundwater?

300

Created when animal waste decays due to bacteria.

What is ammonia?

300

Carbon dioxide + Water —> Sugars + Oxygen

What is the photosynthesis equation?

300

The 3 factors in the phosphorus cycle.

What are biological, human, and geological?

400

What condensed, evaporated water in the atmosphere turn into.

What are clouds?

400

A bacteria in the soil that can break down ammonia into the gas form of nitrogen.

What is dentrification bacteria?

400

The reason that more CO2 is released in the atmosphere.

What are volcanoes?

400

A place where phosphorous in soils can be washed into.

What are water basins?

500

How groundwater is taken up.

What are plants?

500

Done by human activity, can sometimes be harmful.

What are fertilizers?

500

The 4 factors in the carbon cycle.

What are biological, human, geological, and physical/chemical?

500

How sulfur is returned to the soil.

What is animal waste.