How do scientists determine when an era ends and an era begins

Question

Biology

Kiley Chang

11 July, 14:58

How do scientists determine when an era ends and an era begins

+4

Answers (1)

Know the Answer?

Mo · Answer 1

Geologic Time Scale. Scientists decide when an era begins and ends, due to mass extinction ... Scientists determine when drastic changes are made by the fossil record, which shows earths past organisms that have become extinct.