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Teaching materials:
Teaching materials database
Found 2 resources for the concept: Life has been on Earth for billions of years
How Much is a Billion
In this activity, students get a sense of how big a billion really is, which is necessary in order to understand deep time.
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Understanding Geologic Time
A web-based module in which students gain a basic understanding of geologic time, the evidence for events in Earth's history, relative and absolute dating techniques, and the significance of the Geologic Time Scale.
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