Geologists have divided Earth’s history into time units, which are largely based on
A. written correspondences.
B. fossils.
C. climates.
D. oral histories.
Answer:
B. fossils.
Geologists have divided Earth’s history into time units, which are largely based on
A. written correspondences.
B. fossils.
C. climates.
D. oral histories.
Answer:
B. fossils.
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