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A very long time ago....before there were any greenhouse gases, the earth was very very cold. When the solar radiation came down to earth it was reflected back to space.....
Then have the students that are representing the greenhouse gases stand in between Alie and Callie..... Oh i meant the sun and the earth. Opps.....
The student who has the Earth please have a sign showing Earth's temperature.The temp. is 0 degrees F and the students who are shoqing shortwave radiation move the sun close to the earth and then back.
But everything was about to change..... One day, in our atmosphere, greenhouse gases showed up. There ability to absorb heat helped warm the Earth to a comfortable temperature that could support life.
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