Plate Tectonics

3. when an oceanic plate runs into a continental plate and slides beneath it.
4. Discovered that the continent's movement was caused by the seafloor spreading.
5. a continuous body of salt water that is contained in enormous basins on Earth's surface.
8. extremely hot liquid and semi-liquid rock located under Earth's surface.
11. the solid, outer part of Earth.
14. Two tectonic plates that are moving away from each other.
15. the process of deformation that produces the earth's continents, ocean basins, mountains, folds, and faults.
17. a massive, irregularly shaped slab of solid rock.
18. a continuous slow movement from one place to another.
19. Creator of the continental drift theory.

1. an opening in the earth's crust through which lava, volcanic ash, and gases escape.
2. long-term shifts in temperatures and weather patterns.
6. any sudden shaking of the ground caused by the passage of seismic waves through Earth's rocks.
7. a fracture or zone of fractures between two blocks of rock.
9. a landform that rises prominently above its surroundings.
10. Two plates sliding past each other.
12. one of Earth's seven main divisions of land.
13. massive bodies of slowly moving ice.
16. the movement of the plates that make up Earth's crust.
17. a supercontinent that incorporated almost all the landmasses on Earth.