The phases of the moon are caused by the changing positions of the moon relative to the Earth and sun. As the moon revolves around Earth, the portion of the sunlit side facing Earth varies, appearing as different shapes from crescent to full. Over 29.5 days, the moon completes its cycle from new moon, where the sunlit side faces away from Earth, to full moon when the entire sunlit side is visible, then back to new moon again.

1. The phases of the moon You see depends on how much of the sunlit side of the moon faces Earth. As the moon revolves around Earth,you see more and more of the lighted side of the moon Every day,until the side of the Moon you see less and less of The lighted side of the moon. PHASES OF THE MOON WHAT CAUSES PHASES THE CYCLE OF THE PHASES