On average, how often do impacts large enough to produce mass extinction on the Earth occur?
A) once every century
B) once every thousand years
C) once every million years
D) once every hundred million years
E) once in Earth's history

Question

Quizplus · Accepted Answer

Mass extinction events caused by large impacts are rare and are estimated to occur approximately once every hundred million years.

On Average, How Often Do Impacts Large Enough to Produce