The Moon

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Across
  1. 4. The moon only has about 1/6 of Earth's ____________
  2. 6. Due to its gravitational pull on Earth, the moon helps give four of these per day
  3. 7. The moon is the Earth's only natural ____________
Down
  1. 1. Holes that form due to the impact of asteroids and meteors
  2. 2. You could fit about _______ moons inside Earth if it was hollow
  3. 3. This is the title of all of NASA's missions related to the moon
  4. 5. If we had to live on the moon, we may be able to get water from ___ present there