Why does the moon change shape

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Across
  1. 2. a pretend version of something
  2. 4. something can be observed again and again and again in a way thatcan be predicted
  3. 6. moon phase when the Moon looks like a circle
  4. 8. a large, round object in the night sky that can reflect the Sun’s light
  5. 10. cycle the process of the Moon going through all of its phases
  6. 11. moon phase when the Moon looks like a little less than a full circle
Down
  1. 1. moon phase when the Moon looks completely dark
  2. 2. the part of the Moon that we can see on a particular night
  3. 3. moon phase when the Moon looks like a sliver
  4. 5. moon phase when the Moon looks like half of a circle
  5. 7. a set of events that repeats in the same order over and over
  6. 9. circling another object, like the Moon around the Earth