Plate tectonics

2. Pieces of Earth's crust and uppermost mantle, together referred to as the lithosphere
4. The rigid outer part of the earth
7. Boundary between two plates moving away from each other
11. A record produced by a seismograph
13. A sudden and violent shaking of the ground, sometimes causing great destruction
15. The bending of rock layers
16. Boundary between two colliding plates
17. Supercontinent that existed approximately 335 million years ago
18. Layer between the crust and the core

1. Boundary between two plates that are sliding past each other
3. An instrument that measures and records details of earthquakes, such as force and duration
5. New lithosphere is created here
6. A mountain or hill, typically conical, having a crater or vent through which lava, rock fragments, hot vapor, and gas are being or have been erupted from the earth's crust
8. Outermost layer of the Earth
9. Liquid layer of the Earth's core
10. A break in the Earth's crust
12. The upper layer of the earth's mantle, below the lithosphere
14. Solid, dense center of the Earth