Plate Tectonics

1. The large hole at the top of a volcano formed when the roof of a magma chamber collapses.
3. The layer between the Earth's crust and core.
4. A supercontinent that broke apart about 225 million years ago.
8. A weak spot in the crust where magma has come to the surface.
11. A break or crack in Earth's lithosphere along which the rocks move.
12. a rigid layer made up of the uppermost part of a mantle and the crust.
13. Layer of molten iron and nickel that surrounds Earth's inner core.
15. Dense sphere of solid iron and nickel in the center of Earth.

2. Valley form where plates move apart.
5. The soft layer of the mantle on which the lithosphere floats.
6. vibrations that travel through Earth carrying the energy released during an earthquake.
7. Shaking that results from the movement of rock beneath Earth's surface.
9. The hypothesis that the continents slowly move.
10. A section of the lithosphere.
14. Layer of rock that forms the Earth's surface.