When crater counts (on the lunar surface) were compared to the ages of rocks brought back by Apollo astronauts, what was implied about the rate of cratering in the past? a The Moon was hardly being impacted at all until just a few million years ago. b The cratering rate seems to have remained constant throughout lunar history. c The cratering rate was probably much higher before about 3.8 billion years ago. d The Moon only experienced crater-forming impacts during the middle part of its history, between about 3 billion and 2 billion years ago.
When crater counts (on the lunar surface) were compared to the ages of rocks brought back by Apollo astronauts, what was implied about the rate of cratering in the past? a The Moon was hardly being impacted at all until just a few million years ago. b The cratering rate seems to have remained constant throughout lunar history. c The cratering rate was probably much higher before about 3.8 billion years ago. d The Moon only experienced crater-forming impacts during the middle part of its history, between about 3 billion and 2 billion years ago.
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
Problem 1LR
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When crater counts (on the lunar surface) were compared to the ages of rocks brought back by Apollo astronauts, what was implied about the rate of cratering in the past?
a The Moon was hardly being impacted at all until just a few million years ago.
b The cratering rate seems to have remained constant throughout lunar history.
c The cratering rate was probably much higher before about 3.8 billion years ago.
d The Moon only experienced crater-forming impacts during the middle part of its history, between about 3 billion and 2 billion years ago.
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