THE MOON!

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Across
  1. 3. this keeps the moon in orbit around the Earth
  2. 5. an imaginary line that we use to understand rotation
  3. 8. the moon is 4.5 _________________yrs. old
  4. 9. the moon is Earth's only natural _____________
  5. 12. the side of the moon that we cannot see from Earth
  6. 13. the moon has no air, very little _____________
  7. 15. at the center of the moon is a 700km wide _________
  8. 16. continuous trip around a larger object
Down
  1. 1. we base our _____________on the moon's orbit
  2. 2. the moon is 240,000 __________ away
  3. 4. these once erupted on the moon with lava flows
  4. 6. these crash into the moons surface regularly
  5. 7. to turn continuously around on an axis,spin
  6. 10. a large bowl shaped cavity on the surface
  7. 11. action of an object forced to hit another object
  8. 14. the low lands or dark spots we see on the moon