Biogeochemical Cycles

Front

The carbon cycle is a process between the Atmosphere, Land, and Organisms.

Back

All of these

Front

Carbon may be converted into _____ which make up the hard parts of bones of shells.

Back

Calcium Carbonates

Front

Deposits of coal, oil, and natural gas are formed from molecules of: Nitrogen, Oxygen, Carbon, Phosphorus

Back

Carbon

Front

_______ are made up of carbon compounds from the bodies of organisms that died millions of years ago.

Back

fossil fuels

Front

When we burn fossil fuels we release carbon into the atmosphere as what?

Back

carbon dioxide

Front

The nitrogen cycle is a process in which nitrogen is cycled between the: Atmosphere, Bacteria, Organisms.

Back

All of the above

Front

The only organisms that can fix atmospheric nitrogen into chemical compounds are what?

Back

bacteria and lightening

Front

Where do nitrogen-fixing organisms live in plants?

Back

roots

Front

About 78% of the gases in the atmosphere is what? Options: oxygen, nitrogen, carbon, phosphorus

Back

nitrogen

Front

All organisms need _______ to build proteins which are used to build new cells. Options: nitrogen, phosphorus, carbon, oxygen.

Back

nitrogen