manzword

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Across
  1. 2. if there isn't we can't live
  2. 8. if the students leave it at home they can't do the version
  3. 9. neptune consist of ...
  4. 12. the earth rotates on his ..
  5. 13. an abjective to describe the solar radiations
  6. 14. the name of the protagonist
  7. 15. we can have the dinner in the garden if it is fine
  8. 16. the smaller planets can be made of it
  9. 19. if it was further from the sum it would be too ..
  10. 20. if you do this in that society you are considered a fool
  11. 21. if we are too close to it we die
Down
  1. 1. it is 9.8N on our planet
  2. 3. a flash of light
  3. 4. if it was bigger, the gravity would be much stronger
  4. 5. if it was smaller and gravity was weaker, it wouldn't hold our ..
  5. 6. the universe is 13.7... years old
  6. 7. if there were no water on the earth we would have ....
  7. 10. how many planets there are in our solar sistem
  8. 11. stop moving
  9. 17. if there isn't we can't have out seasons
  10. 18. a strong hard building material made with gravel