Description: Earth History Intro: In this investigation you start by estimating familiar units of time and then develop a model for larger units.
Keywords: modeling, time, earth, history, intro, investigation, start, estimating, familiar, units, develop, model, larger
Created by: Steve Kluge Added: 2005-09-01
Earth Science (Earth History and Geologic Time) Views: 2000
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For classroom use under a: Creative Commons License