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Carbon Cycle Foldable https://www.youtube.com/watch?v=nzImo8kSXiU Photosynthesis and Respiration • Photosynthesis – Plants take in CO2, sunlight, and water to make food – Carbon is used for ENERGY – Animals get carbon from eating plants or from eating animals that eat plants. • Respiration – Animals and plants putting CO2 back into the atmosphere. – Convert food to energy using oxygen and giving off CO2 Decomposition • When plants or animals die – Decomposers • bacteria, fungi, some insects, and snails, which means they are not always microscopic. • Use some of carbon for own bodies, rest is returned to the atmosphere. Combustion and Sources • When fossil fuels are extracted from the earth and burned. • CO2 released into the atmosphere • Other carbon sources – Animals – Forest fires – Volcanic eruptions Storage and Sinks • Sink – A place on earth where carbon is stored/absorbed – Where? • • • • • • • Water (surface and deep ocean) Plants and trees Atmosphere Fossil Fuels Rocks (carbonates like limestone) Soil Shells (contain CaCO3 calcium carbonate) Humans are increasing earth’s natural carbon cycle by………. • Cutting down trees (deforestation) – Deforestation releases carbon dioxide back into the atmosphere as well as taking away the ability of the trees to absorb CO2 • Burning fossil fuels – Burning releases carbon atoms that have been locked away inside the earth for millions of years. – Extra CO2 acts like a blanket trapping extra heat that otherwise would escape into space. – Therefore increasing earths temperature. What is the Oceans role in the Carbon Cycle? • https://www.youtube.com/watch?v=HrIr3xDhQ0E