choice bord

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Across
  1. 2. smallest planet
  2. 3. biggest planet
  3. 6. biggest body of water on earth
  4. 7. heat rises cold sinks
Down
  1. 1. a step in the water cycle
  2. 4. the star in the middle of the solar system
  3. 5. circles the earth
  4. 8. only livable planet