the carbon cycle
The water cycle
The phosphorus cycle
The nitrogen cycle
100

process that makes natural gasses and oxygen?

What is photosynthesis?

100

Where the water goes after it condensates 

What are clouds?

100

they use their waste products to help return the sulfur to the soil 

What are animals?

100

78% nitrogen 

What is the atmospher?

200

The photosynthesis equation 

What is carbon dioxide + water+ Sugar =oxygen 

200

the water ___ from the ocean 

What is evaporation 

200

strangles all other life forms in the water 

What is over growth 

200

Higher organisms use nitrogen to make 

What are proteins

300

Burning fossils fuels 

What is released because of burning fuels ?

300

1st step of water cycle 

What is evaporation 

300
phosp in soils can be washed  into 

What are basins?

300

Releases N2 gas through denitrification 

What is bacteria 

400

Another source of CO2

What are volcanos ?

400

Describes how water evaporates from the surface of the earth 

What is the water cycle 

400

too much phosphorus rich fertilizer 

What is hazardous , too large 

400

____ is turned into fertilizer and applied to crops 

What is N2 gas ?

500

Animals use this to make CO2

What is respiration 

500

Process of water cycle 

What is evaporation, transpiration, condensation, precipitation 

500

Washes phosphates from rock into the ocean 

What is geological activity 

500

Animal waste decay by the action of bacteria which creates___

what is ammonia?