Across
- 3. What is the innermost layer of the earth?
- 9. The mesosphere underlies what?
- 10. What is the study of the plates on earths surface and their movement called?(2 words)
- 15. What do tectonic plates float on?
- 18. What is it called when one plate is pushed under another plate?
- 19. What lies directly beneath the crust?
- 20. What are the silicate liquids beneath the earths surface?
Down
- 1. The outer core is ______ dense than the mantle.
- 2. How thick on average is oceanic crust (in km)?
- 4. What causes magma to curculate in the mantle?(2 words)
- 5. What is a common rock found in oceanic crust?
- 6. The inner core is composed of _____ and ______.(2 words)
- 7. What kind of clouds comes out of the top of a volcano with the lava?
- 8. Who first proposed the theory of continential drift?
- 11. What kind of natural disaster is produced whe to plates rub against eachother?
- 12. The continential crust is _______ than oceanic crust.
- 13. What is the outermost layer of the earth?
- 14. The San Andreas fault is a _______ boundary.
- 16. What is the super continent formed millions of years ago?
- 17. The silicate liquids that have flowed out of the earths crust?