Biology 1005 Final pt 2 population growth and carbon cycle

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Biology 1005 Final pt 2 population growth and carbon cycle
2012-11-13 15:22:48
Carbon cycle

population growth and carbon cycle slides
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  1. Ecological footprint is
    an estimate of the amount of land needed to support our multiple demands on Earth’s resources
  2. The Carbon Cycle is
    Biogeochemical cycle by which carbon is exchanged between the biosphere, geosphere, hydrosphere, and atmosphere of the Earth.
  3. Sources of Carbon
    • CO2 atmosphere
    • C6H12O6 organism
    • H2CO3 ocean
    • CH4 animal matter
    • CaCO3 organism
  4. The most important feature of the carbon cycle is the circulation of carbon from the ____ environment into the___ ___ ___ and back into the ___ environment.
    abiotic, living things (biotic), abiotic
  5. Photosynthesis process:
    Abiotic ---> biotic environment
  6. Cellular Respiration Process:
    Biotic ---> abiotic environment
  7. Photosynthesis: Requires CO2 and produces O2 it also
    • Removes carbon from the abiotic environment and restores carbon to the biotic environment
    • Examples: plants, cyanobacteria, algae
  8. Cellular Respiration Requires... and produces..
    • Requires O2 and produces CO2
    • Carbon is removed from the biotic environment and restored to the abiotic environment.
  9. C6H12O6 (sugar) + 6O2 (oxygen) ----------> 6H2O (water) + 6CO2 + ATP (energy)

    Is the formula for..
    Cellular Respiration
  10. Gases that trap heat in the atmosphere are often called ___ ____
    greenhouse gases
  11. How do greenhouse gasses occur?
    Some occur naturally and are emitted to the atmosphere through natural processes and human activities. Other greenhouse gases (e.g., fluorinated gases) are created and emitted solely through human activities
  12. Name the Greenhouse Gases:
    • Carbon dioxide
    • Nitrous oxide
    • Methane
    • Aerosol propellants
  13. What do greenhouse gases do?
    Increases the atmosphere’s ability to retain heat
  14. What happens if more CO2 is being produced than can be used?

    Result: excess CO2 in the atmosphere
  15. What impact will excess CO2 have?
    • Increase heat  retained in the atmosphere
  16. Carbon is relised in the atomspher though ____ ____ performed by plants and animals. This is an exothermic reaction and it involves the breaking down of glucose (or other organic molecules) into CO2 and H2O.
    cellular respiration
  17. How is Carbon released into the atmosphere?
    • cellular respiration,
    • decay of animal and plant matter
    • burning fossil fuels
    • At the surface of the oceans
  18. How is carbon is relised into the atmosphere through decay of animal and plant matter?
    Through the decay of animal and plant matter. Fungi and bacteria break down the carbon compounds in dead animals and plants and convert the carbon to CO2 if oxygen is present, or methane if not.
  19. How is carbon released through the burning of fossil fuels?
    Through burning fossil fuels such as coal, petroleum products, and natural gas releases carbon that has been stored in the geosphere for millions of years. Burning agrofuels also releases CO2 .
  20. How is carbon released at the surface of the oceans?
    At the surface of the oceans where the water becomes warmer, dissolved carbon dioxide is released back into the atmosphere.
  21. Scientists are interested in predicting some of the impacts that increased CO2 in the atmosphere will have:

    • Increase in temperature
    • Rise in sea level (melting glaciers and sea ice)
    • Increased occurrence/intensity of climatic events (hurricanes, snow, rain)
    • Species range shifts
  22. What anthropogenic activities affect the Carbon Cycle?
    Burning fossil fuels, Deforestation
  23. How does the anthropogenic activity of Burning fossil fuels affect the carbon cycle?
    • Releases more CO2 into the atmosphere than the natural
    • carbon cycle can manage
    • Excess carbon emissions from vehicles
  24. How does the anthropogenic activity of deforestation affect the carbon cycle?
    Eliminates the plants that incorporate CO2 into the biosphere (photosynthesis)