How do we know that the volcanoes of Mars are billions of years old?
A)Meteorites from Mars show no evidence of volcanic eruptions
B)There are impact craters on their slopes
C)Volcanic eruptions have never been witnessed
D)Mars has no molten material in its interior

Question

Quizplus · Accepted Answer

The presence of impact craters on the slopes of the Martian volcanoes suggests that they have been in existence for billions of years, as it takes a significant amount of time for such craters to accumulate. Options A, C, and D are incorrect as they do not provide any evidence or reason to suggest the age of Martian volcanoes.

How Do We Know That the Volcanoes of Mars Are