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Carbon cycle

100

This is a natural source for CO2

Volcanoes 

200

This is the main regulator for CO2 in the atmosphere 

Ocean 

300

To much CO2 in the atmosphere is responsible for this 

Green House Effect 

400

These are deposits of fossil fuels

Coal, Oil, Natural Gas

500

This is the equation for Photosynthesis 

6CO2+6H2O-C6H12O6+6O2

Phosphorus cycle

100

Phosphorus is contained mostly in

Rocks and minerals 

200

Is the cycle Phosphorus, phosphorus moves between 

Soil and Plants

300

To much phosphorus leads to 

Overgrowth 

400

this is what humans bring into the enviorment that ruins things 

Pollution 

500

Why is the use of fertilizers bad 

It kills plants 

Nitrogen cycle

100

This is percentage of nitrogen gas

78

200

bacteria in the soil can break down the ammonia into the gaseous form of nitrogen 

Denitrification 

300

Special bacteria that use fixed nitrogen to benefit other 

Nitrogen-fixing 

400

Higher organisms use nitrogen to make 

Proteins 

500

animals eat ____ containing nitrogen 

Plants 

Limitations

100

With ample amount of sun their is 

Limited nutrients 

200

Nutrient whose supply is limiTed 

Limiting nutrient 

300

Used to replace plants 

Fertilizer 

400

Normally nitrogen is limited in the 

Ocean

500

Is freshwater phosphorus is 

Limited