Multiple choice general knowledge science & technology What determines how much of the moon you see each clear night? Where the earth is in its orbit around the sun Where the moon is in its orbit around the earth The amount of light the moon gives off The amount of light the sun gives off Reveal answer Fill a bubble to check yourself B Correct answer Explanation The moon's phases depend on its orbital position around Earth, which changes the viewing angle of its sunlit half. The amount of moonlight we see varies from new moon to full moon as the moon progresses through its 29.5-day cycle.