Transcription: If you watch the moon over the course of several days, you will see that its appearance changes. The varying appearances, called phases, depend upon the relative positions of the sun and moon. At different times of the month, the sun illuminates different parts of the moon. When the moon is between the sun and the Earth, we cannot see any of the illuminated side of the moon. The moon is dark. We call this phase the new moon. The amount of lighted surface visible from the Earth begins to grow. We see a waxing crescent. When the moon reaches first quarter, we see half of it lit. As the illuminat ...
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