Earthquakes & Volcanos

2. A rigid layer made up of the uppermost part of the mantle and the crust
5. Dense ball of solid material at the center of he Earth
8. A layer of molten iron and nickel that surrounds the inner core of the Earth
10. A break or crack in the Earth's lithosphere along which rocks move
11. A soft layer of the mantle on which the lithosphere floats
12. A plate boundary where two plates move away from each other
14. The name of the single landmass that broke apart about 225 million years ago
15. German Scientist who developed the Theory of the Continental Drift in 1912.

1. A plate boundary where two plates move toward each other
3. The process by which oceanic crust sinks beneath a deep-ocean trench and back into the mantle at a convergent plate boundary
4. A deep valley where two plates move apart
6. layer of rock that forms the Earth's outer surface
7. A deep canyon on the ocean floor
9. A plate boundary where two plates grind against each other, moving it different directions
13. Thickest layer of the Earth; it consists of two layers the lithosphere and the asthenosphere