Presentation on theme: "Global Carbon Cycle 7. b. Students know the global carbon cycle: the different physical and chemical forms of carbon in the atmosphere, oceans, biomass,"— Presentation transcript:
1 Global Carbon Cycle7. b. Students know the global carbon cycle: the different physical and chemical forms of carbon in the atmosphere, oceans, biomass, fossil fuels, and the movement of carbon among these reservoirs.
2 The Global Carbon Cycle Carbon dioxide in the atmosphere is dissolved and stored in the ocean as carbonate and bicarbonate ions, which organisms take in to make their shells.
3 When these organisms die, their shells rain down to the ocean floor, where they may be dissolved if the water is not saturated in carbonate. Otherwise, the shells are deposited on the ocean floor and become incorporated into the sediment, eventually turning into a bed of carbonate rock, such as limestone.
4 Carbon ReservoirsCarbon is held temporarily in a number of reservoirs, such as inbiomass (carbon in living things)the atmosphere (as carbon dioxide)oceansfossil fuels
5 Carbon Reservoirs Carbon dioxide AtmosphereBiosphereOceansFossil FuelsCarbon dioxideSugar and organic molecules in living organismsDissolved carbon dioxide and bicarbonate and carbonate ionsCoalOilGas Deposits
6 How is carbon cycled through? Biological MeansRespiration and photosynthesisPhysical MeansPlate tectonicsGeologic Cycle
7 Movement of the carbon cycle Some movement of carbon between reservoirs takes place through biological meansrespirationphotosynthesis
8 Movement of Carbon Cycle Physical means, such as those related to plate tectonics and the geologic cycle.