Carbon Cycle
Phosphorus Cycle
Nitrogen Cycle
Water Cycle
100

Carbon dioxide + water = oxygen + sugar

What is the photosynthesis equation?

100

Not found in the free state of nature

What is phosphorus?

100

78% of our atmosphere

What is nitrogen gas?

100

Taken up by plant roots and then, through, transpiration, released to the atmosphere

What is groundwater?

200

Respiration

How do animals use oxygen to make more CO2?

200

Too much phosphorus in water leads to…

What is plant overgrowth?

200

Create ammonia and nitrate products rich in nitrogen

What is animal waste decay by the action of bacteria?

200

Falls to the surface as precipitation

What is water?

300

Main regulator of CO2 in the atmosphere

What is the ocean?

300

Another source of phosphorus in water

 What is man-made pollution?

300

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

What is denitrification bacteria?

300

Water from oceans and lakes evaporates and then condenses

What are clouds?

400

Coal, Oil, and Natural Gases

What are the deposits that are burned as fossil fuels?

400

Some of the phosphorus in soils can be washed away into…

What are water basins?

400

Higheer organisms use nitrogen to make…

What are proteins?

400

Water

What is H2O gas?

500

Natural source for CO2

What are volcanoes?

500

Phosphorus makes up an important chemical

What is DNA?

500

special bacteria that can only directly use nitrogen in our atmosphere and “fix” it so other organisms can benefit

What is nitrogen-fixing bacteria?

500

Powered from the energy emitted by the sun

What is the water cycle?