Why Does the Moon Change Shape?

Answer

The moon keeps changing its shape because the position of the moon and the sun's reflection on it keeps changing. The moon orbits around the earth every 29 and a half days and during this revolution we see the light reflected from the sun at different angles and in different shapes. This is what forms the phases of the moon.
Q&A Related to "Why Does the Moon Change Shape?"
The moon is not actually changing shape, what we see is the earth's shadow blocking a portion of the sunlight reflecting off the moon. The reason it changes is that as the moon orbits
http://www.ask.com/web-answers/Science/Astronomy/w...
Technically it does not. It is always a round sphere. We perceive that there is a change because as the Moon orbits the Earth the angle of the Sun's light falling on the Moon changes
http://wiki.answers.com/Q/Why_does_the_shape_of_th...
The Moon never really changes shape. But the part of the Moon that reflects sunlight-which is the only part of the Moon we see-varies throughout the month. It takes the Moon about
http://www.answers.com/topic/why-does-the-moon-cha...
Because the earth orbits the sun the moon collects light from the Sun which
http://www.chacha.com/question/why-does-the-shape-...
1 Additional Answer
The Moon dose not change shape, it only appears to change shape. What you are seeing is the shadow of the Earth falling across the surface of the Moon. Because the Moon is a ball in space the shadow looks curved on its surface giving the Moon a crescent shaped appearance.
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