Earthquakes

3. the point beneath earth's surface where rock breaks under stress and causes an earthquake.
6. _________ scale -A scale that rates earthquakes according to there intensity and how much damage they cause at a particular place.
9. pulls on the crust, stretching rock so that it becomes thinner in the middle.
11. seismic waves that vibrate from side to side to side as well as up and down.
12. an earthquake that occurs after a larger earthquake in the same area.
14. _________ magnitude scale - a scale that rates earthquakes by estimating the total energy released by an earthquake.
15. squeezes rock until it folds or breaks.
19. a device that records ground movement caused by seismic waves as they move through Earth.
20. the measurement of an earthquake's strength based on seismic waves and movement along faults.
21. the force that opposes the motion of one surface as it moves across another surface
24. ________ fault -a type of fault in which rocks on either side move past each other sideways with little up or down motion.
25. the point on earth's surface directly above an earthquake's focus.
27. an upward fold in rock formed by compression of earth's crust.
28. can cause rock to break and slip apart or to a change its shape.

1. the record of an earthquake's seismic waves produced by a seismograph.
2. -the block of rock that forms the lower half of a fault.
4. the process by which an earthquake's violent movement suddenly turns lose soil into liquid mud.
5. ________ scale - a scale that rates an earthquake's magnitude based on the size of its seismic waves.
7. ________ fault - a type of fault where the hanging wall slides downward; caused by tension in the crust.
8. _________ fault -a type of fault where the hanging wall slides upward caused by compression in the crust.
10. a downward fold in rock formed by compression in earth's crust.
11. ________ waves -A type of seismic wave that forms when p waves and s waves reach earth's surface.
13. ___________ wall - the block that forms the upper half of a fault.
16. a type of seismic wave and that compresses and expands the ground.
17. base _______ building - a building mounted on bearings designed to absorb the energy of an earthquake.
18. the shaking that results from the movement of rock beneath earths surface.
22. a force that acts on rock to change its shape or volume.
23. a large area of flat land elevated high above sea level.
26. a large wave produced by an earthquake on the ocean floor.