1. Carbon Cycle This topic just keeps coming up, over and over again

2. The Carbon Cycle Carbon from air turned into carbohydrates by plants. Photosynthesis CO 2 + H 2 O --> C 6 H 12 O 6 + O 2 Producers REMOVE carbon from air.

3. The Carbon Cycle Returned to the air: Cellular Respiration ALL organisms do this (or something very like it) C 6 H 12 O 6 + O 2 --> CO 2 + H 2 O Decay by bacteria (who are doing cellular respiration with the “bodies”). Fires. (Same chemical formula as cellular respiration, only faster)

4. The Carbon Cycle Stored underground as fossil fuels like oil and natural gas. Came from: Plants that got buried a LONG time ago Heating of limestone. Took a LONG time to form.

5. Coal Swamps Peat moss. Periodic flooding by ocean rise buried layers of peat moss b/t layers of sediment. Now coal “seems” http://www.snh.org.uk/sc ottish/argyllstirling/birth.a sp http://www.snh.org.uk/sc ottish/argyllstirling/birth.a sp

6. The Carbon Cycle Carbon Dioxide dissolves in water to form carbonic acid. used by marine organisms to make shells and coral homes precipitates as calcium carbonate = limestone. VERY slow process.

7. The Carbon Cycle It WILL end up back in the ground, but... The ONLY way is to wait THOUSANDS or even MILLIONS of years for it to happen naturally.

8. The Carbon Cycle Releasing CO 2 with: Electric Power Plants Vehicles Heating and Air Conditioning

9. The Carbon Cycle Atmospheric CO 2 Dissolved CO 2 Open burning Photosynthesis Respiration Fuel Combustion Photosynthesis Respiration Fossil fuels