Plate Tectonic

2. surface along which rocks break and move.
3. Point of Earth's surface directly above an earthquake's focus.
4. Waves that travel outward from an Earthquake's focus and cause particles in rocks to move back and forth in the same direction the wave is moving.
7. A broad volcano with gently sloping sides.
8. powerful seismic sea wave that can travel thousands of kilometers in all directions and that begins over an earthquake focus.
9. Largest layer inside Earth, lying directly above the outer core.
10. waves of energy that reach Earth's surface during an earthquake, travel outward from the epicenter, and move rock particles up and down, and side to side.
11. The point beneath Earth's surface where energy release occurs, in a earthquake.
12. Liquid core that surrounds Earth's solid inner core.
13. Earths innermost part.
14. Large opening formed when the top of a volcano collapse.
15. Waves that travel outward from an earthquake's focus and move through Earth by causing particles in rocks to vibrate at right angles to the direction of the wave.
16. Device used by seismologists to record primary, secondary, surface waves from earthquake.
18. Earth's outermost layer.
19. A volcano formed by alternating layers of tephra and lava and that is found mostly where Earth's plates come together.

1. Rigid, outermost layer of Earth that is about 100km thick, and is composed of the crust and part of the upper mantle.
4. Theory that Earth's crust and upper mantle are broken into sections that move around on a plastic-like layer of the mantle.
5. scientist who studies earthquakes and seismic wave.
6. Steep-sided volcano made of loosely packed tephra.
15. Energy waves that are produced at and travel outward from the earthquake's focus.
17. Single large landmass made up of all the continents connected together that broke apart 200 million years ago.