One night Katrina was studying the position of the stars and the Moon in the sky. She made a sketch of the position of the Moon in the sky, as shown in the figure. What is the reason for this movement of the Moon in the sky?

Question

Responses
A The rotation of Earth about its axisThe rotation of Earth about its axis
B Earth’s orbital motion around the SunEarth’s orbital motion around the Sun
C The Moon’s orbital motion around EarthThe Moon’s orbital motion around Earth
D The rotation of the Moon about its axis

Answer 1

The correct response is:

C. The Moon’s orbital motion around Earth

This choice explains why the Moon appears to move in the sky, as it orbits Earth and thus changes its position relative to the stars and the Earth itself.