The Moon Is Seen to Keep One Face Toward Earth

question 127

Multiple Choice

The Moon is seen to keep one face toward Earth at all times. If viewed from a point directly above the plane of the planetary system, how does it have to rotate to maintain this alignment?

• A) The moon must rotate once per day to maintain its direction toward Earth.
• B) The moon must not rotate at all because we always see the same face from Earth.
• C) The moon must rotate once per year as Earth and the Moon orbit the Sun together.
• D) The moon must rotate once per month, or once per orbit around Earth.