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Geologic Time and Earth's History
Worksheet
Grade Level
Grade 8
8.107 Geologic Time and Earth's History
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Why can the geologic time scale be refined when scientists discover new fossils or improve radiometric dates?
A
New evidence can sharpen correlations and adjust boundary ages
B
The time scale is based on guesses that ignore evidence
C
Earth's age changes whenever a fossil is found
D
Rocks stop recording events after scientists name them
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