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