Question

When the Moon reaches equal periods of orbital and rotational periods, it's known as _______ rotation.

A. non-conforming
B. asynchronous
C. imbalanced
D. synchronous

Answer 1

It is known as synchronous rotation. A good way to remember it is that it looks and sounds a lot like "synchronize".

Answer 2

When the Moon reaches equal periods of orbital and rotational periods, it's known as synchronous rotation.