Carbon Cycle

During Photosynthesis oxygen and (a)   are produced from carbon dioxide and water

Glucose is broken down into carbon dioxide water during

(a)  

The decay of dead plants and animals returns _____ to the _________

Burning fossil fuels sends tons of (a)   into the atmosphere

(a)   , oxygen and calcium combine to form CaCo3

People have mined and drilled for (a)  

Mollusks use _________ _________ to make their shells

Shells of dead mollusks become _________ , A ___________ rock. Erosion returns carbon to the cycle

Over millions of years decayed plants and animals formed fossil fuel ______ underground , trapping _________ there

Weather & Dissolution