Question

On what is the geologic time scale based?

A. geologic events

B. changes in climate and historical records

C. evolutionary events

D. geologic and biologic events

Answer 1

Answer: Either A or D

Geologists and paleontologists constructed the geologic table based on the relative positions of different strata and fossils, and estimated the time scales based on studying rates of various kinds of weathering, erosion, sedimentation, and lithification.

Answer 2

geologic events or geologic and biologic events