Plate Tectonics

1. Molten rock below Earth's surface
4. The Earth's outermost layer
5. When one plate sinks below another plate during a collision
8. An opening in the Earth’s crust through which lava, volcanic ash, and gases escape.
9. The point on Earth's surface directly above the hypocenter
12. molten rock that has erupted onto Earth's surface
13. The center of the Earth
15. The process of new crust forming at the ocean ridges and spreading outwards
16. The layer beneath Earth's crust
18. Where two plates are moving apart from each other in opposite directions
19. A huge wave caused by the displacement of water below the surface; usually caused by earthquakes

2. A layer of 'plastic' semi-solid rock in the lower mantle on which Earth's tectonic plates move
3. The crust that forms the continents
4. Where plates are colliding with each other
6. The rigid outer part of the earth, consisting of the crust and upper mantle.
7. The separating of continents by drifting across earth's surface
10. A zone where Earth's crust and mantle are being torn apart
11. The rapid movement of the ground, usually back and forth and up and down in a wave motion, due to the movement of tectonic plates
14. The dense, watery crust
17. the place below ground where the earthquake starts