Across
- 2. caused by divergent plate boundaries underwater
- 4. outer layer of earth
- 6. the gradual movement and formation of continents
- 9. movement of one tectonic plate going under another
- 10. mountain caused by plate tectonics that can spew magma
- 14. cracks in earths crust where there is movement
- 15. drives the movement of earths tectonic plates in the molten mantle.
- 17. violent shaking caused by movement of plates
- 20. lower layer of earths crust
Down
- 1. hard part of earth containing crust and outer mantle
- 3. a theory explaining the structure of the earth's crust and many associated phenomena as resulting from the interaction of rigid lithospheric plates which move slowly over the underlying mantle.
- 5. a change is shape due to force
- 7. amount per unit size
- 8. formulated the first complete statement of the continental drift hypothesis
- 11. Transfer of heat caused by molecular motion
- 12. a hypothetical continent including all the landmass of the earth
- 13. large hills caused by tectonic plates hitting eachother
- 16. a slab made of earths crust
- 18. molten rock in earths crust that can come out through volcanoes
- 19. any of the world's main continuous expanses of land