Plate Tectonics

2. massive slabs of rock that form the Earth's outer shell
3. A long, narrow depression on the seafloor formed due to subduction.
4. Where the edge of one plate slides under another denser plate
9. a weak to violent shaking of the ground due to tectonic plate movements
10. an opening in the Earth's crust where magma, ash, and gas escape from deep within the planet
11. the rigid, outermost layer of Earth
14. linear zone where the Earth's lithosphere is being pulled apart
18. Two plates collide
19. a fracture or zone of fractures in the Earth's crust where there has been displacement between two blocks of rock
20. Large waves of water due to tectonic plate movements.

1. Two plates moving away from each other
5. the slow, circular movement of hot rock in the Earth's mantle that drives the movement of tectonic plates.
6. Two plates slide beside each other
7. A thick layer of rock between the Earth's crust and core that drives the movement of tectonic plates.
8. The central part of the Earth
12. The supercontinent
13. a tectonic belt of volcanoes and earthquakes
15. Molten rock that has erupted on to earth's surface
16. a theory that the continents were together in a supercontinent, but drifted to different places overtime.
17. the molten rock mixture found beneath the Earth's surface
18. the solid, rocky outer shell of the Earth that is broken into tectonic plates