Across
- 4. if you are lucky you find it
- 7. if it was closer there would be too much radiation
- 11. the name of our solar sistem
- 12. if you go out you have to get it
- 13. if you look up during teh night you see them
- 14. it is infinite
- 18. under your feet
- 19. the movement of the earth on its axis
- 20. he does experiments
Down
- 1. the first chimical element of the periodic table
- 2. if you don't have friends you feel like this
- 3. if you want to swim you can go there
- 5. if you want to go out you wear it
- 6. if the sun explodes it becomes this
- 8. if it was smaller and gravity was weaker it wouldn't hold our oceans
- 9. blocks harmful solar radiation
- 10. it covers 70% of the Earth
- 15. at the center of the solar sistem
- 16. it is made of rock and metal
- 17. if the temperature is cold water becames it