The Moon doesn’t make its own ____. The light we see from the Moon is actually sunlight ____ off the moon’s surface. The Sun is always lighting up one ____ of the Moon, just like it lights up one side of the Earth during the day. The Moon ____ around the Earth because of Earth’s gravitational pull. As it moves, we see different parts of the lit-up side of the Moon. Sometimes we see just a ____ part. Other times we see the whole bright side — that’s a ____. The Moon’s shape doesn’t actually change. It only looks different because of the way we see it from Earth. The whole cycle takes about ____ days and is called the ____.

Why does the Moon seem to change shape?

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