Exploring Faults

4. secondary wave that moves in an up and down pattern
9. the crust in upper area of the mantle
10. a molten rock
11. large pieces in the crust and upper area
12. the strength of an earthquake
13. plate boundaries move horizontally past each other
17. where the earthquake starts
18. wave that can move over 700 kilometers per hour at sea with a height of only about 1 meter
19. the point on the surface of the earth directly above the focus
20. breaks in the earth’s surface along which rock can move

1. smaller earthquakes that happen in the same place as the larger earthquake that follows
2. when rocks along the plate boundaries shift suddenly and release their stored energy
3. scientists who study the movement of the earth
5. The largest, main earthquake
6. The location below the earth’s surface where the earthquake starts
7. another name for thrust
8. fault type where rocks move apart
14. occurs when rocks push together
15. instrument that records earthquakes
16. primary wave that moves in a straight path with a push and pull motion