The rate of cratering in the lunar highlands shows us that:
A)they must be younger than the older, darker mare.
B)they range from 4.6-4.4 billion years old, on average.
C)the largest impacts are the youngest, such as Copernicus and Tycho.
D)the oldest rocks are at least as old as the mare, but some craters are much younger.
E)most of the asteroids must have hit the Moon, not the Earth.

Question

Quizplus · Accepted Answer

The rate of cratering in the lunar highlands suggests that they are about 4.6-4.4 billion years old on average, which is slightly older than the lunar mare. This is based on the assumption that every impact crater is roughly of the same age. However, there is evidence that some craters are much younger. The rate of cratering in the lunar highlands allows scientists to estimate their age, which ranges from 4.6-4.4 billion years old, on average. This is because the highlands have been heavily cratered since the beginning of the solar system, giving us a good idea of their age.

The Rate of Cratering in the Lunar Highlands Shows Us