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Carbon Cycle Notes 6.1
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I. What is Carbon? II. Carbon Cycle An element
The basis of life on Earth Present in rocks, oceans and the atmosphere II. Carbon Cycle The continuous process by which carbon is exchanged between organisms and the environment.
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III. Plants Use CO2 IV. Animals Eat Plants
Plants pull carbon dioxide (CO2) from the atmosphere and use it to make sugars. (photosynthesis) Plants use some of the sugars (structure/respiration) IV. Animals Eat Plants When organisms eat plants, they take in carbon They use it as food to provide them with energy Some of it becomes part of their own bodies.
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V. Decomposition of Plants & Animals
When plants and animals die, most of their bodies decompose and carbon atoms return to the atmosphere Some don’t decompose fully and end up in deposits underground as fossil fuels (oil, coal, natural gas)
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VI. Carbon Stored in the Ground
Carbon is stored in fossils and/or fossil fuels (oil, coal, natural gas) In nature, carbon found in rocks and underground deposits is released VERY slowly back into the atmosphere.
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VII. Carbon in Oceans Carbon is stored in the ocean as CO2
Carbon is found in the form of calcium carbonate in the shells of aquatic species. When animals die, carbon substances are deposited at the bottom of oceans. Oceans contain Earth’s largest reservoir of carbon!
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VIII. Human Impact The release of carbon from fossil fuels is very slow in nature. Humans DRASTICALLY speed up this process by burning fossil fuels. Heating up the oceans reduces their ability to store carbon. Fewer plants means less CO2 removed from atmosphere.
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IX. Videos https://www.youtube.com/watch?v=A4cPmHGegKI
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