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Arches National Park Geology Tour provides an extensive, visually rich description of the geology of Arches, by Deborah Ragland, Ph.D. See our DVD collection.

Movie courtesy of the Little Shop of Physics.

Snuff It! with CO2

This episode of "Science It Up!" from the Little Shop of Physics demonstrates how carbon dioxide gas is more dense than air. To show this, they snuff out the flames of candles invisibly - with the help of some "dry ice". You can't see their carbon dioxide gas, but you can prove that it's there when you watch the flames go out.

Right-click (Windows) or Option-click (Mac) here to download a copy of this video in QuickTime format.

Click here to learn more about the Little Shop of Physics.

Last modified January 18, 2011 by Randy Russell.

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The Fall 2009 issue of The Earth Scientist, which includes articles on student research into building design for earthquakes and a classroom lab on the composition of the Earth’s ancient atmosphere, is available in our online store.

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Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part is sponsored in part through grants from federal agencies (NASA and NOAA), and partnerships with affiliated organizations, including the American Geophysical Union, the Howard Hughes Medical Institute, the Earth System Information Partnership, the American Meteorological Society, the National Center for Science Education, and TERC. The American Geophysical Union and the American Geosciences Institute are Windows to the Universe Founding Partners. NESTA welcomes new Institutional Affiliates in support of our ongoing programs, as well as collaborations on new projects. Contact NESTA for more information. NASA ESIP NCSE HHMI AGU AGI AMS NOAA