The Carbon Cycle
What Is Carbon? <ul><li>An element </li></ul><ul><li>The basis of life of earth  </li></ul><ul><li>Found in rocks, oceans,...
Carbon Cycle <ul><li>The same carbon atoms are used repeatedly on earth. They cycle between the earth and the atmosphere. ...
Plants Use Carbon Dioxide <ul><li>Plants pull carbon dioxide from the atmosphere and use it to make food — photosynthesis....
Animals Eat Plants <ul><li>When organisms eat plants, they take in the carbon and some of it becomes part of their own bod...
Plants and Animal Die <ul><li>When plants and animals die, most of their bodies are decomposed and carbon atoms are return...
Carbon Slowly Returns to Atmosphere <ul><li>Carbon in rocks and underground deposits is released very slowly into the atmo...
Cycle – Repeats Over and Over and Over and Over …
 
The Carbon Cycle
Carbon in Oceans <ul><li>Additional carbon is stored in the ocean. </li></ul><ul><li>Many animals pull carbon from water t...
Algae in the oceans are most responsible for CO 2  uptake.
Human Impact <ul><li>Fossil fuels release carbon stores very slowly </li></ul><ul><li>Burning anything releases more carbo...
What We Need to Do <ul><li>Burn less, especially fossil fuels </li></ul><ul><li>Promote plant life, especially trees </li>...
Natural Sources  of  Carbon Sources of Carbon from Human Activity <ul><li>Death of plants and animals </li></ul><ul><li>An...
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C carbon cycle last

  1. 1. The Carbon Cycle
  2. 2. What Is Carbon? <ul><li>An element </li></ul><ul><li>The basis of life of earth </li></ul><ul><li>Found in rocks, oceans, atmosphere </li></ul>
  3. 3. Carbon Cycle <ul><li>The same carbon atoms are used repeatedly on earth. They cycle between the earth and the atmosphere. </li></ul>
  4. 4. Plants Use Carbon Dioxide <ul><li>Plants pull carbon dioxide from the atmosphere and use it to make food — photosynthesis. </li></ul><ul><li>The carbon becomes part of the plant (stored food). </li></ul>
  5. 5. Animals Eat Plants <ul><li>When organisms eat plants, they take in the carbon and some of it becomes part of their own bodies. </li></ul>
  6. 6. Plants and Animal Die <ul><li>When plants and animals die, most of their bodies are decomposed and carbon atoms are returned to the atmosphere. </li></ul><ul><li>Some are not decomposed fully and end up in deposits underground (oil, coal, etc.). </li></ul>
  7. 7. Carbon Slowly Returns to Atmosphere <ul><li>Carbon in rocks and underground deposits is released very slowly into the atmosphere. </li></ul><ul><li>This process takes many years. </li></ul>
  8. 8. Cycle – Repeats Over and Over and Over and Over …
  9. 10. The Carbon Cycle
  10. 11. Carbon in Oceans <ul><li>Additional carbon is stored in the ocean. </li></ul><ul><li>Many animals pull carbon from water to use in shells, etc. </li></ul><ul><li>Animals die and carbon substances are deposited at the bottom of the ocean. </li></ul><ul><li>Oceans contain earth’s largest store of carbon. </li></ul>
  11. 12. Algae in the oceans are most responsible for CO 2 uptake.
  12. 13. Human Impact <ul><li>Fossil fuels release carbon stores very slowly </li></ul><ul><li>Burning anything releases more carbon into atmosphere — especially fossil fuels </li></ul><ul><li>Increased carbon dioxide in atmosphere increases global warming </li></ul><ul><li>Fewer plants mean less CO 2 removed from atmosphere </li></ul>
  13. 14. What We Need to Do <ul><li>Burn less, especially fossil fuels </li></ul><ul><li>Promote plant life, especially trees </li></ul>
  14. 15. Natural Sources of Carbon Sources of Carbon from Human Activity <ul><li>Death of plants and animals </li></ul><ul><li>Animal waste </li></ul><ul><li>Atmospheric CO2 </li></ul><ul><li>Weathering </li></ul><ul><li>Methane gas from cows (and other ruminants) </li></ul><ul><li>Aerobic respiration from terrestrial and aquatic life </li></ul><ul><li>Burning wood or forests </li></ul><ul><li>Cars, trucks, planes </li></ul><ul><li>Burning fossil fuels such as coal, oil and natural gas to produce heat and energy. </li></ul>

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