Carbon and nitrogen cycling

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  • 1. Carbon and Nitrogen Cycling

2. What is a carbon atom?

  • #6 on the periodic table. Its symbol is C.
  • All living organisms are based on the carbon atom.
  • Carbon atoms continually move through living organisms, the oceans, the atmosphere, and the crust of the planet.

3. 4. What are the basics of the carbon cycle?

  • Plants use carbon dioxide, water, and sunlight to make sugar molecules and oxygen.
  • Animals take in oxygen and break down sugar molecules releasing energy, carbon dioxide, and water.

5. Simple picture 6. How do plants do it?

  • Photosynthesis!
    • The process by which producers use the energy from sunlight to produce sugar, which consumers convert to "fuel.
    • 6H 2 O + 6CO 2----------> C 6 H 12 O 6 + 6O 2
    • 6 molecules of water + 6 molecules of carbon dioxide = 1 molecule of sugar + 6 molecules of oxygen

7. What happens when plants cant absorb all the carbon we produce?

  • Carbon builds up in our atmosphere and oceans. This may be a cause of Global Warming.
  • Global Warming (Green house gases)
  • Results (Green house gas results)
  • OCEANS (Bill Nye the sink effect)

8. Carbon Cycle Summary

  • Summarize the Carbon Cycle.
  • Name two things you can do to lower the amount of Carbon in the atmosphere.

9. Nitrogen Atoms

  • All life requires nitrogen. (protein and DNA are just a few uses)
  • Air is 79% nitrogen gas (N 2 ).
  • Nitrogen Cycle Movie

10. Nitrogen Cycling Basics

  • Most organisms cannot use nitrogen in the form N 2or Free Nitrogen.
  • It must be combined with other molecules or Fixed.
  • This is done by bacteria who live in nodules on plant roots.
    • This is an example of mutualism!
  • Lightning also fixes Nitrogen.

11. Simple Picture 12. Remember

  • Water, Carbon, and Nitrogen are all necessary to living things.
  • All three are types of matter.
  • All three are constantly being cycled through producers, consumers, decomposers, and the environment.


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