Mercury's smooth plains are most similar to the Moon's:
A)maria.
B)highlands.
C)craters.
D)mountain ranges.

Question

Quizplus · Accepted Answer

Mercury's smooth plains, known as "smooth plains units," are most similar to the Moon's maria, which are also smooth volcanic plains. Both features formed from volcanic activity and have relatively flat surfaces compared to other lunar and planetary features. Mercury's smooth plains are similar to the Moon's maria, which are basaltic plains created by volcanic activity. Both Mercury and the Moon lack tectonic activity, so there is no evidence of plate movement or mountain building. Craters and highlands are found on both bodies, but the smooth plains are most similar to the maria.

Mercury's Smooth Plains Are Most Similar to the Moon's