Put the units of the geologic time scale in order from largest to smallest. (Note: In this situation, First refers to the largest time period and Fourth refers to the smallest times period.)

A) Eon
B) Era
C) Period
D) Epoch

1) First (largest period)
2) Second
3) Third
4) Fourth (smallest period)


Answers: 1) A 2) B 3) C 4) D

Environmental & Atmospheric Sciences

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