Plate Tectonics
Across
- 2. process that deformed Earth’s crust to create major structural features
- 3. hypothesis that suggested all present continents existed as a single supercontinent
- 4. when igneous rocks melt over a temp range
- 5. divergent boundaries that develop within a continent because the landmass is split into two or more smaller segments separated by an ocean basin
- 7. oceanic crust is produced at the crest of mid ocean ridges
- 8. supercontinent containing all of the existing continents
- 11. mountains formed in part by igneous activity associated with the subduction of oceanic lithosphere beneath a continent
- 12. boundary in which two plates move together
- 15. continuous elevated zone on the floor of all the major ocean basins varying in width from 500 to 5000 km
- 16. boundary in which two plates slide past on another without creating or destroying lithosphere
- 17. Elevated areas of the seafloor characterized by high heat flow and volcanism
- 18. deep canyon like structure
- 19. primary driving force for movement of tectonic
- 20. a well tested theory proposing that Earths outer shell consist of Individual plates that interact in various ways to produce earthquakes, volcanoes, mountains, and the crust itself
Down
- 1. chain of volcanic islands generally located a few hundred km from a trench where this is active subduction of one oceanic plate beneath another
- 6. Boundary in which two plates move apart, resulting in upwelling of material from the mantle to create new sea floor
- 9. German meteorologist and geophysicist
- 10. heat is continuously flowing outward from earths interior causing convection in the mantle
- 13. elongated depression
- 14. narrow depression on the sea floor