Mia Valles - Space review

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Across
  1. 4. what causes planets to move around the sun (two words)
  2. 6. the outer planets are _________. (two words)
  3. 7. a place that is livable is _________.
  4. 8. Closest planet to the sun
Down
  1. 1. protects earth from radiation (two words)
  2. 2. the inner planets are _______. (Two words)
  3. 3. mvemjsun
  4. 5. force of attraction between two or more objects with mass