Plate Tectonics

2. A plate boundary where two plates move toward each other. Crust is destroyed.
8. A plate boundary where two plates move past each other in opposite directions. No crust formed or destroyed.
12. The name of the single landmass - a supercontinent - that broke apart 200 million years ago and gave rise to today's continents.
14. Theory created by Alfred Wegener that describe the movement of continents away from the supercontinent Pangaea over time.
15. A large wave produced by an earthquake on the ocean floor.
16. Large movable plates of lithosphere under the Earth's surface that "ride" or move on the asthenosphere.
17. Shaking and vibration at the surface of the earth resulting from underground movement along a fault plane or from volcanic activity.

1. The region where two tectonic plates are in contact and result in a natural phenomena or landform.
3. Earth's lithosphere is broken into huge, slabs of rock - continental and oceanic - moving on the asthenosphere.
4. The process by which oceanic crust sinks beneath a deep-ocean trench and back into the mantle at a convergent plate boundary.
5. An undersea mountain chain where new ocean floor is produced; a divergent plate boundary.
6. The process by which molten material adds new oceanic crust to the ocean floor.
7. A major belt of volcanoes that rims the Pacific Ocean.
9. Some are formed by two continental plates colliding and forcing each other upwards.
10. A plate boundary where two plates move away from each other. New crust is formed.
11. A vent or fissure in the Earth's surface through which magma and gases are expelled.
13. A break in Earth's crust where rocks have slipped past each other.