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Geological time scale graphic showing eras, periods, and epochs.

Geological time scale graphic showing eras, periods, and epochs.

FREE FORCES OF NATURE ACTIVITY~  Students guess what force of nature-- water, wind, earthquake, etc.-- causes the change in the earth's surface.  Then they select the time-- 100 years, 10,000 years, etc.  The program shows the changes when the student correctly guesses.  Cool!

FREE FORCES OF NATURE ACTIVITY~ Students guess what force of nature-- water, wind, earthquake, etc.-- causes the change in the earth's surface. Then they select the time-- 100 years, 10,000 years, etc. The program shows the changes when the student correctly guesses. Cool!

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