carbon cycle
Phosphorus cycle
nitrogen cycle
Water cycle
Random
100

Process plants use to make sugar and oxygen 

Photosythesis

100

Item phosphorus makes up that is necessary for life

What is DNA?

100

Organisms that contain nitrogen

What are plants?

100

Chemical makeup of water

What is H2O?

100

number of classifications 

What is 4?

200

Too much CO2 can result in 

What are greenhouse gase?

200

Too much phosphorus results in 

What is overgrowth?

200

Organisms that use nitrogen for proteins 

What are higher organism?

200

Water becoming water vapor

What is evaporation?

200

Classification performed by living organisms 

What is biologica?

300

the main regulator of CO2

What is the ocean

300

Where phosphorus is found 

What are rocks and minerals?

300

Bacteria that take nitrogen from the atmosphere

What are nitrogen fixing bacteria?

300

Water coming down from the sky

What is precipitation?

300

Classification by burning fossil fuels and mining 

What is human?

400

The photosynthesis equation 

What is carbon dioxide plus water equals oxygen and sugar 

400

What phosphorus moves between

What are soil and plants?

400

The percent of nitrogen in our atmosphere 

What is 78%?

400

Water in the ground 

what is ground water?

400

Classification by volcanoes and rock formations 

What is geologica?

500

Causes more greenhouse gases today then in the past

What is burning fossil fuel?

500

where phosphorus in soil is washed to

What is a basin?

500

Process when they take nitrogen from the soil 

What is denitrofixation?

500

Water vapor turning into clouds

What is condensation?

500

Classification by clouds and lightning 

What is chemical?