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Type: Multiple-Choice
Category: Historical Geology
Level: Grade 8
Score: 1
Author: mslinda
Last Modified: 6 years ago

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Historical Geology Question

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Grade 8 Historical Geology

When did geologic time begin?
  1. about 4.6 million years ago
  2. about 4.6 thousand years ago
  3. about 4.6 years ago
  4. about 4.6 billion years ago