School related crossword (Brittany)

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Across
  1. 1. It is a sphere related to air
  2. 5. Its the opposite of division
  3. 9. Its a planet with a hurricane on it
  4. 10. it is another word to say able to live on
  5. 11. Its a sphere related to water
  6. 15. a group of parts that interact
  7. 16. it has a big eyes and their skin is green
  8. 17. It is a planet that humans live in
  9. 18. It is a math subject
  10. 19. its a space company
Down
  1. 2. Its a planet with a ring on it
  2. 3. It is something 307 does in the morning
  3. 4. To write a fraction or expression in simplest form
  4. 6. Its where rockets go to
  5. 7. We are planning to live on this planet
  6. 8. its the planet closest to the sun
  7. 12. It comes out in the morning
  8. 13. A comparison of two quantities by divison It is the opposite of multiplication
  9. 14. A long narrow groove that forms