1. CH. 14 Vocabulary test study guide

2. Surface along which rocks move when they pass their elastic limit

3. fault

4. Measure of the energy released during an earthquake

5. magnitude

6. In an earthquake, the point below Earth’s surface where energy is released in the form of seismic waves

7. focus

8. Wave generated by an earthquake that travels through Earth

9. Seismic wave

10. Instrument used to register earthquake waves & record the time that each arrived

11. seismograph

12. Seismic wave that moves rock particles up and down in a backward rolling motion and side to side in a swaying motion

13. Surface wave

14. Seismic wave that moves rock particles back & forth in the same direction that the wave travels

15. Primary wave

16. Break in rock caused by tension forces, where rock above the fault surface moves down relative to the rock below the fault surface

17. Normal fault

18. Occurs when wet soil acts more like a liquid during an earthquake

19. Liquefaction

20. Seismic wave that moves rock particles at right angles to the direction of the wave

21. Secondary wave

22. Vibrations produced when rocks break along a fault

23. earthquake

24. Seismic sea wave that begins over an earthquake focus & can be highly destructive when it crashes on shore

25. tsunami

26. Break in rock caused by compressive forces, where rock above fault moves upward relative to the rock below the fault surface

27. Reverse fault

28. Break in rock caused by shear forces where rocks move past each other without much vertical movement

29. Strike-slip fault

30. Point on Earth’s surface directly above an Earthquake’s focus

31. epicenter