Carbon And Nitrogen Cycles Vocab Review

plants take in carbon dioxide to make their own food

long dead plants and animals turn into (a)     which release carbon dioxide into the atmosphere when they are burned

Organisms in the oceans die and carbon compounds in their bodies get deposited as layers in the ocean floor

Burning fossil fuels resulting to CO2 and other oxidized compounds back into the atmosphere is called (a)  

organisms release carbon dioxide

decomposers break down dead organisms and return the carbon to the soil

(a)   is the process of decomposers breaking down dead organisms and returning the nitrogen to the soil

animals get nitrogen from eating plants and other animals

live in certain plant roots, can “fix” nitrogen into a usable form

 the air is made of 78% nitrogen gas, a form which cannot be used by plants or animals