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Greenhouse Effect Simulator: Questions

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Greenhouse Effect Simulator: Questions
NAME: __Menglei ZHang_________ Greenhouse Effect SIM
GO TO Website: http://phet.colorado.edu/en/simulation/greenhouse.
Click on “Run Now” to run the simulation.

What do the yellow dots moving down represent?____sunlight photon_____________________
What do the red dots represent?__________infrared photon_________________ Watch them carefully. Do they all move upwards? ______No. Sunlight photons move downwards. Because the earth is receiving it._____ Why or why not?

Today Record the composition of the atmosphere (on the right side of the screen): H2O (water vapor) | 70% rel. humidity | CO2 (carbon dioxide) | 388 ppm | CH4 (methane) | 1.843 ppm | N2O (nitrous oxide) | 0.317ppm |
(ppm means “parts per million”) | Record the temperature on the thermometer: K (kelvin) | 290k | °F (degrees Fahrenheit) | 60F | °C (degrees Celsius) | 15.5C | |

1750
Click on “1750” on the right side of the screen to set the atmosphere to the proportions for that date. Wait a few minutes for the temperature to stabilize. Record the composition of the atmosphere (on the right side of the screen): H2O (water vapor) | 70% rel. humidity | CO2 (carbon dioxide) | 280 ppm | CH4 (methane) | 0.73ppm | N2O (nitrous oxide) | 0.27ppm | | Record the temperature on the thermometer: K (kelvin) | 288k | °F (degrees Fahrenheit) | 58F | °C (degrees Celsius) | 15C | |

Ice Age
Click on “Ice Age” on the right side of the screen to set the atmosphere to the proportions for Earth’s last major ice age. Wait a few minutes for the temperature to stabilize. Record the composition of the atmosphere (on the right side of the screen): H2O (water vapor) | Unkonwn | CO2 (carbon dioxide) | 180ppm | CH4 (methane) | 0.380ppm | N2O (nitrous oxide) | 0.215ppm | | | | Record the temperature on the thermometer: K (kelvin) | 278K | °F (degrees Fahrenheit) | 40F | °C (degrees Celsius) | 4.4C | |

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