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Science & Technology

Geological Time

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Keystone eMedia Teachers' Domain Collection

RESOURCE	GRADE LEVEL	MEDIA TYPE
Deep Time In this video a Penn State professor refers to National Park canyons carved out by water and wind as he explains “deep time” - the notion that the earth is billions of years old; another professor states how the theory of evolution is supported by evidence of an ancient Earth recorded in rocks.	6-12	Video