Which fact about the moon, as seen from the earth, is evidence that the amount of time the Moon takes to complete one rotation a
nd 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: C) We always see the same side of the Moon from Earth
Explanation:
The moon is a natural satellite of earth which orbits around the earth with an orbital period (time to complete one revolution ) of around 27 days . Along with this the moon also rotates about its own axis with period of rotation 27 days which is approximately same as the period of revolution . Due to this coincidence that the amount of time the Moon takes to complete one rotation and one revolution are nearly identical , we always see the same side of the Moon from Earth .
If the Moon did not rotate on itself or did so at a different rate, it would gradually show its entire surface: the visible side and the hidden side. The coincidence between both periods (the rotation and orbital periods) is known as synchronous rotation.
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