2. presented by Carbon Dude

3. Carbon Dioxide basis of carbon cycle comprises 0.03% of earth’s atmosphere usually more CO 2 in city air than country air product of combustion (oil, gasoline, coal, natural gas, wood) and respiration

4. climate change Why should I care about carbon dioxide? Carbon dioxide is directly related to greenhouse gases greenhouse gases global warming pollution

5. What are greenhousegases? transparent gases in the atmosphere which contribute to the greenhouse effect trap heat near the Earth’s surface include CO 2, CH 4 (methane), nitrous oxide, chlorofluorocarbons (CFCs), and water vapor can raise the mean global temperature of the Earth

6. What are chlorofluorocarbons? chemicals that contain the elements chlorine, fluorine, and carbon were used in refrigerator coolant, manufacture of aerosol sprays, blowing agents for foams and packing materials, and as solvents when released, deplete the ozone layer of the atmosphere use should be obsolete in the next decade

7. What is ozone? Ozone is a substance derived from the element, oxygen. O Ozone (O 3 )-a highly active compound in the atmosphere which is widely dispersed in a 15 to 50 km thick layer that prevents harmful UV rays from reaching the earth.

8. + + - O G oxygen 8 15.9997 How many electrons? How many protons? How many neutrons? 8 8 8 atomic number = atomic mass - + + + + + + - - - - - - How many energy levels? 2

9. # of protons = atomic number + + + + + + + + 12 34 5678 # of energy levels Which properties are used to position oxygen on the periodic table? 1 2 8 O

10. 18 km ozone 50 km 90 km Troposphere Stratosphere Mesosphere Exosphere Thermosphere / Ionosphere Exosphere Thermosphere / Ionosphere 500+ km Upper Atmosphere

11. What is the greenhouseeffect? CO 2 changes in the Earth’s atmosphere that may enhance the natural warming process and elevate global temperature CO 2 Most outgoing heat energy: trapped CO 2

12. Looking at earth from space. (1994). NASA Bibliography “Global Carbon Cycles.” (12 April 1999). Available. [Online] http://www.uoregon.edu/~dogsci/dorsey/geo103/lect3.html Schimel, et al. (1995). Climate Change 1994. CO 2 and the carbon cycle. Cambridge University Press: Cambridge, UK. Kasting, James F. (1995). Consequences. The carbon cycle, climate, and the long-term effects of fossil fuel burning. Available. [Online] http://www.gcrio.org/CONSEQUENCES/vol4no1/carbcycle.html Elkins, James W.(1999). Chlorofluorocarbons (CFCs). Available [Online http://www.cmdl.noaa.gov/noah/publictn/elkins/efcs.html] National Oceanic and Atmospheric Administration, Climate Monitoring and Diagnostics Laboratory Modified from 2004 Plano ISD