Question

What causes the phases of the moon as observed from the Earth?

A) Filtering of the light from the moon due to the Earth's atmosphere.
B) The tidal forces of the Earth's oceans change the appearance of the moon.
C) Change in distance of the moon from the Earth as it orbits in an elliptical orbit.
D) The angle of light from the sun as it reflects off the moon and viewed from the Earth's surface.

Answer 1

Your answer is D) The angle of light from the sun as it reflects off the moon and viewed from the Earth's surface because of the way the sun hits the moon one side has to light the other doesn't and when the moon rotates the sun hits another part of the moon.
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