Phases of the moon

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Across
  1. 2. Occurs when the Moon appears as a complete circle in the sky.
  2. 3. Force that pulls objects together.
  3. 5. Made up of gases or air that surround the Earth.
  4. 7. The phase when the moon cannot be seen.
  5. 8. Occurs when the moon appears to be getting larger.
  6. 12. To go around the Earth.
  7. 13. Occurs when the moon appears to be getting smaller.
Down
  1. 1. The phase when the moon looks like it's half.
  2. 4. Part of the moon that appears in the sky.
  3. 6. A piece of rock or stone fallen to the ground from space.
  4. 9. Imaginary line through the moon or Earth from the pole to pole.
  5. 10. The space program of the United States.
  6. 11. A natural satellite of the Earth.