Carbon
Cycle
Phosphorus
Cycle
Nitrogen
Cycle
Water
Cycle
100

Plants use photosynthesis to make these two nutrients.

What is sugar and oxygen?

100

Phosphorus is not found in a free state of nature but is mostly contained in

What are rocks and minerals?

100

The percentage of nitrogen has in the atmosphere.

What is 78%?

100

Any water source that is underground…

What is groundwater?

200

The main regulator of CO2 in the atmosphere.

What is the ocean?


200

Phosphorus is an important nutrient for life as it makes up important chemicals such as…

What is DNA?

200

Special organisms that can directly use nitrogen in the atmosphere and make it so other organisms can benefit from it.

What are nitrogen-fixing bacteria?

200

The stage in the cycle in which water comes down from clouds in any way.

What is precipitation?

300

6CO2 + 6H20————————>C6H12O6 + 6O2

What is the formula for photosynthesis?

300

Too much phosphorus in water leads to this…

What is plant overgrowth?

300

The bacteria in soil that breaks down ammonia into the  gaseous form of nitrogen.

What is denitrification bacteria?

300

How clouds are formed…

What is condensation?

400

Too much CO2 in the atmosphere may be responsible for this.

What is the Greenhouse effect?

400

The reason why use of too much phosphorus-rich fertilizes could be bad for the environment

what is the reason that they could run off into water causing excess growth?

400

Higher organisms use nitrogen to make these…

What are proteins?

400

How water turns into a gas and is sent into the atmosphere.

What is precipitation?

500

More CO2 is released into the atmosphere today because of

What is burning fossil fuels?

500

A big source of phosphorus in water that is man-made…

What is pollution?

500

The way that animals return nitrogen to the soil…

What is through their waste?

500

When plants take in water through their roots and release it into the atmosphere through their leaves…

What is transpiration?

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