The Moon

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Across
  1. 5. the Moon was formed at the same time as the Earth
  2. 7. the tides that occur when the difference between high and low tides is least
  3. 9. the Moon formed from material spun off from the Earth
  4. 11. seas, lunar lowlands that resemble seas as viewed from Earth
  5. 12. interplanetary chunks of stone that have crashed into a planet or moon from space
  6. 13. a gravitational force that varies in strength and/or direction
Down
  1. 1. the Moon formed as the result of an impact between a large object and the Earth
  2. 2. the moon is made up of Solar System debris captured by Earth
  3. 3. exceptionally high and low tides that occur at the time of the new or full moon
  4. 4. closest distance from the Earth
  5. 6. the conical shifting of the axis of a rotating object
  6. 8. the friction that results from tides on a rotating object
  7. 10. farthest distance from the Earth