carbon cycle
nitrogen cycle
Water cycle
phosphorus cycle
100

One natural source of co2

Volcanos

100

What percentage of nitrogen is the atmosphere 

78%

100

How is ground water taken up to the su 

Plant roots

100

a Source of phosphorus is water comes from man made what

Pollution 

200

How did carbon form in deposits

Decay of plants and animals 

200

When bacti decay’s animals it creates 

Nitrate and ammonia

200

What is one of the things the atmosphere is made of

H2O

200

Too much phosphorus in water leads to

Plant overgrowth 

300

What are examples of fossils fules

Coal,oil, and natural gas

300

How does nitrate return to the soil

Waste and decaying plants

300

When water falls to the surface from clouds it is called

Perspiration 

300

Some phosphorus in soil is wash away into what

Basins

400

What is the main regular for of co2 in the atmosphere

the ocean 

400

Some organisms use nitrogen to create what?

Proteins

400

Large body of water and very important to the water cycle 

Ocean 

400

What do animals create that returns phosphorus into the soil

Waste

500

what is the photosynthesis equation 

Water+co2=sugar+oxygen

500

Plants and animals can’t use all the nitrogen found in what?

The atmosphere 

500

Water evaporrates and condenses in to what

Clouds

500

Phosphorus is mostly contained but NOT only contained in what?

Rocks and minerals