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3. When two tectonic plates come together and make a shaking sensation.
4. Wegener German meteorolgist and geophysicist
6. a mixture of molten and semi-molten rock found beneath the surface of the Earth
9. boundaries The location where two plates meet.
10. The hard outer layer of the Earth that we live on.
12. molten rock on the surface
17. features on the earth's surface that make up the terrain
18. A large continuous mass of land that conventionally regarded as a collective region
19. ridge A sea floor mountain system formed by plate tectonics.
20. currents Heat driven cycles that occure in the air

1. flow Formed from the formed fragments ejected during a volcanic eruption.
2. A hypothetical landmass in the northern hemisphere near the end of the Paleozoic Era.
5. A scientific theory that explains how major land forms are created as a result of Earth's subterranean movements
7. The wearing away of rocks and other deposits on the Earth's surface by the action of water, ice, wind, etc.
8. A large area of land that is believed to have existed long ago.
11. Andreas Fault An archaic variation of the Spanish language San Andres
13. Vents where lava and steam erupt into the Earth's surface.
14. A period in an organisms life cycle when growth is temporarily stopped.
15. core The liquid layer of Earth's core.
16. core The innermost layer of the Earth.