Across
- 3. the study of rocks
- 5. the most fragile mineral
- 8. very hard sand that is basically stone
- 9. they have crystals in them
- 11. they are in minerals
- 14. they make earthquakes
- 18. the upper layer has lots of magma
- 19. chunk of frozen fresh water
- 20. mountains with lava and magma
Down
- 1. melted rocks and minerals
- 2. a huge rock structure
- 4. thinnest layer on earth
- 6. when air moves
- 7. when something is so hot its looses its form and becomes a thick liquid
- 10. if earth was this its crust would be skin
- 12. a mixture of minerals
- 13. when two tectonic plates rub
- 15. the world was this when it was combined
- 16. the hardest mineral on earth
- 17. most of the volcanos are here