Author Question: The number of impact craters on the slopes of Tharsis volcanoes suggests that they have been ... (Read 80 times)

amal · **on:** Jul 27, 2018

The number of impact craters on the slopes of Tharsis volcanoes suggests that they have been inactive

A) since Mars formed 4.6 billion years ago
B) for at least a billion years
C) for at least tens of millions of years
D) only for the last few hundred years

Question 2

Newton's 3rd Law of Motion states that

A) action and reaction are equal and opposite
B) force equals mass times acceleration
C) an object moves at a constant velocity unless a force acts
D) the force of gravity decreases with increasing distance