Water Cycle
Carbon Cycle
Nitrogen Cycle
Phosphorus Cycle
100

The process by which water is taken up into the atmosphere from oceans and lakes.

What is evaporation?

100

The process that animals use to make CO2.

What is Respiration?

100

The percentage of our atmosphere that is nitrogen gas.

What is 78%?

100

Phosphorus is mostly found in these.

What are rocks and minerals?

200

The process by which water comes down to the surface.

What is precipitatio?

200

The main regulator of CO2 in the atmosphere.

What is the ocean?

200

The process by which bacteria releases N2 gas.

What is denitrification?

200

Phosphorus makes up this as it is important for life.

What is DNA?

300

The process by which ground water is taken up to the atmosphere.

What is transpiration?

300

The burning of this creates natural gas, oil and coal.

What are fossil fuels?

300

Humans turn N2 into this to use on crops.

What is fertilizer?

300

This is what washes phosphorus into the ocean.

What is geological activity?

400

 The process by which water turned into clouds.

What is condensation?

400

These things take up CO2 during photosynthesis.

What are producers?

400

Nitrogen is released by this.

What is excretion?

400

This is a bad thing that comes out of the phosphorus cycle.

What is overgrowth?

500
The water that goes to bodies of water when coming back down to the earth.

What is surface runoff?

500

CO2 dissolves in this when coming back down to earth.

What is rainwater?

500

Nitrogen is taken up by these.

What are primary producers?

500

The overgrowth of phosphorus leads to this.

What is pollution?