Carbon Cycle
Water Cycle
Nitrogen Cycle
Phosphorus Cycle
100

Animals use oxygen in the process of ____ to make more Carbon dioxide? 

What is respiration?

100

Which two factors are present in this cycle? 

What is Biological and Physical/Chemical?

100

Which factor is not present in this cycle?

What is geological?

100

True or False: phosphorus is found in the found in the free state of nature. 

What is False?

200

Plants use carbon dioxide in the process of _____ to make sugar and oxygen?

What is photosynthesis?

200

Water from oceans and lakes evaporates and then _____ to form clouds?

What is condenses? 

200

How much of our atmosphere is nitrogen?

What is 78%

200

What essential chemical does phosphorus make up?

What is DNA?

300

More carbon dioxide is released in the atmosphere today than in the past because of _____?

What is the burning of fossil fuels?

300

Animal waste decay creates which two products rich in nitrogen?

What is ammonia and nitrate?

300

Too much phosphorus in water leads to _________?

What is plant overgrowth?

400

The _____ is the main regulator of carbon dioxide in the atmosphere because carbon dioxide dissolves easily in it?

What is the ocean?

400

True or False: Animals and plants can use all the nitrogen found in our atmosphere.

What is False?

400

Some of the phosphorus in soils can be washed away into water ____?

What is basins?

500

What is the photosynthesis equation?

Carbon dioxide + Water = Sugar + Oxygen

500

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

What is Denitrification Bacteria?

500

What is one of the man made ways for phosphorus to enter water? 

What is pollution?