Carbon cycle
Phosphorus cycle
Nitrogen cycle
Miscellaneous
100

What is the process plants use CO2 in?

What is Photosynthesis?

100

What is Phosphorus mostly contained in?

What is minerals and rocks?

100

How much nitrogen gas does our atmosphere have?

What is 78%

100

What uses fertilizer to help replace for plants?

What is soil?

200

What is the process animals use oxygen to make more CO2?

What is Respiration?

200

Phosphorus moves between what two things in the phosphorus cycle?

What is soil and plants?

200

Animal waste decay  the action of bacteria creates what two products?

What is nitrate and ammonia?

200

Where is nitrogen usually limited?

What is the ocean?


300

What are the deposits that are burned as fossil fuel?

What is coal, oil, and natural gas?

300

What is another source of phosphorus that is in water and is man-made?

What is pollution?

300

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

What is nitrogen-fixing?

300

What is the process where elements, chemical compounds, and other forms of matter are passed from 

one organism to the other?

What is Biogeochemical cycle?

400

What is another natural source for CO2?

What is volcanoes?

400

What does too much phosphorus in water lead to?

what is plant overgrowt?

400

What can animals and plants not directly uses nitrogen found in our atmosphere?

What is nitrogen?

400

Which element is in each of the cycles?

What is oxygen?

500

Too much CO2 in the atmosphere may cause what?

What is the green house effect?

500

What helps return sulfur for the next generation of phosphorus in soil?

What is animal waste?

500

What is the bacteria that soil can break down the ammonia into gaseous form of nitrogen?

What is denitrification?

500

What is the chemical substance that an organism needs to sustain life?

What are nutrient?