Question 4 of 10 Which is the smallest division of geologic time?
O A. Eon
O B. Period
O C. Era
O D. Epoch

Epoch

Explanation: An epoch is the smallest unit of time on the scale, but still encompasses a period of millions of years. Chronologically, epochs are grouped together into larger units called periods. Periods are combined to make a subdivision called an era. An eon is the largest division of geological time.

d. the weight of the book