Carbon cycle (ANIMATED)

9 de Feb de 2015

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Carbon cycle (ANIMATED)

  1. What Is Carbon? An element The basis of life of earth Found in rocks, oceans, atmosphere
  2. Carbon Cycle The same carbon atoms are used repeatedly on earth. They cycle between the earth and the atmosphere.
  3. Plants Use Carbon Dioxide Plants pull carbon dioxide from the atmosphere and use it to make food –— photosynthesis. The carbon becomes part of the plant (stored food).
  4. Animals Eat Plants When organisms eat plants, they take in the carbon and some of it becomes part of their own bodies.
  5. Plants and Animal Die When plants and animals die, most of their bodies are decomposed and carbon atoms are returned to the atmosphere. Some are not decomposed fully and end up in deposits underground (oil, coal, etc.).
  6. Carbon Slowly Returns to Atmosphere Carbon in rocks and underground deposits is released very slowly into the atmosphere. This process takes many years.
  7. Cycle – Repeats Over and Over and Over and Over …
  8. Carbon Cycle Diagram Carbon in Atmosphere Plants use carbon to make food Animals eat plants and take in carbon Plants and animals die Decomposers break down dead things, releasing carbon to atmosphere and soil Bodies not decomposed — after many years, become part of oil or coal deposits Fossil fuels are burned; carbon is returned to atmosphere Carbon slowly released from these substances returns to atmosphere
  9. Carbon in Oceans  Additional carbon is stored in the ocean.  Many animals pull carbon from water to use in shells, etc.  Animals die and carbon substances are deposited at the bottom of the ocean.  Oceans contain earth’s largest store of carbon.
  10. The Carbon Cycle
  11. Human Impact Fossil fuels release carbon stores very slowly Burning anything releases more carbon into atmosphere — especially fossil fuels Increased carbon dioxide in atmosphere increases global warming  Fewer plants mean less CO2 removed from atmosphere
  12. What We Need to Do Burn less, especially fossil fuels Promote plant life, especially trees
  13. Carbon reservoirs
  14. Carbon Cycle
  15. Carbon is released into the atmosphere in several ways  Respiration by plants and animals.  Decay of animal and plant matter.  Combustion of organic material  Production of cement.  The ocean releases CO2 into the atmosphere.  Volcanic eruptions and metamorphism
  16. Carbon is taken from the atmosphere in several ways Photosynthesis. The oceans when the seawater becomes cooler, more CO2 dissolve and become carbonic acid. In the upper ocean areas organisms convert reduced carbon to tissues, or carbonates.
  17. Photosynthesis CO2 + H2O + sunlight  CH2O + O2
  18. Respiration CH2O + O2  CO2 + H2O + energy
  19. Combustion or Oxidization of hydrocarbon CH4 + 2 O2  CO2 + 2 H2O + energy
  20. Human Impacts on the Carbon Cycle Burning fossil fuels have serious impact on the carbon cycle.
  21. Fossil Fuel 86% of global primary energy consumption is fossil fuels.
  22. Fossil Fuels • Petroleum • Natural Gas • Coal
  23. CO2 Concentration Pre-Industrial value: 280 ppm (600 billion tons) Current value: 380 ppm (800 billion tons) Critical value: 560 ppm (1200 billion tons)
  24. Organic Carbon Hydrocarbons: CH4 Carbohydrate: CH2O
  25. Inorganic carbon Carbon Dioxide: CO2 Calcium Carbonate: CaCO3 Mandale Limestone Quarry
  26. Carbon reservoirs •The atmosphere. •The biosphere (include fresh water systems and non-living organic material, such as soil carbon). •The oceans ( including dissolved inorganic carbon and living and non-living marine biota). •The lithosphere (sediments, Earth core including fossil fuels).
  27. Carbon Carbon exists in the nonliving environment as:  Carbon dioxide (CO2)  Carbonic acid ( HCO3 − )  Carbonate rocks (limestone and coral = CaCO3)  Deposits of Fossil fuels  Dead organic matter

Notas del editor

  1. Parts of the Earth system where carbon is stored is called carbon reservoirs
  2. The movement of carbon, in its many forms, between the biosphere, atmosphere, oceans, and geosphere is described by the carbon cycle.
  3. Through the respiration performed by plants and animals. Through the decay of animal and plant matter. Through combustion of organic material which oxidizes the carbon it contains. Production of cement. At the surface of the oceans where the water becomes warmer, dissolved carbon dioxide is released back into the atmosphere. Volcanic eruptions and metamorphism release gases into the atmosphere.