Question

Which fact about the moon, as seen from the earth, is evidence that the amount of time the Moon takes to complete one rotation and one revolution are nearly identical?
A We usually see the Moon at night.
B We cannot see the Moon on some nights.
C We always see the same side of the Moon from Earth.
D We only see a “Full Moon” for a day or two per lunar cycle.

Answer 1

C

We always see the same side of the Moon from Earth, which indicates the Moon's rotation period equals its orbital period (tidal locking). If the rotation and revolution periods were different, we would see different faces of the Moon over time.