Earthquakes

2. Occurs when the pressure built up along a fault line becomes so great that the fault moves.
6. Compression, tension, and shearing are types of______ on rocks.
7. Rocks move away from each other.
8. The Ring of ____ is an area bordering the Pacific Ocean where many earthquakes occur.
10. __________ zones result in movement along fault lines.
11. Rocks move together.
13. The _______ Scale measures the magnitude of earthquakes.
14. Rocks slide past each other.
17. The movement of earth's plates is called plate _________.
19. The strength of an earthquake.
20. fault that is caused by compression
21. The ________ Scale describes what you might see and feel during an earthquake.
23. Seismic waves that shake back and forth (no spaces).
24. _______ waves arrive after p waves and s waves.

1. The study of earthquakes.
3. _________ boundaries contribute to earthquakes and volcanic eruptions.
4. The point in the earth where the earthquake originates
5. waves generated by an earthquake under the ocean.
9. The point on the earth's surface above the focus.
10. _______ waves help determine which layers of the earth are solid or liquid.
12. Measures and records details of earthquakes.
15. A ______ fault is caused by tension.
16. A __________ fault is caused by shearing (two words, no spaces).
18. Seismic waves that move back and forth, or up and down (no spaces).
22. A smaller earthquake that occurs after the main event.