Plate Tectonics

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

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