Earthquakes

4. -a large wave produced by an earthquake on the ocean floor.
7. -the shaking that results from the movement of rock beneath earths surface.
8. - the measurement of an earthquake's strength based on seismic waves and movement along faults.
9. -the point beneath earth's surface where rock breaks under stress and causes an earthquake.
10. scale -A scale that rates earthquakes according to there intensity and how much damage they cause at a particular place.
13. -squeezes rock until it folds or breaks.
16. scale - a scale that rates an earthquake's magnitude based on the size of its seismic waves.
17. -shearing can cause rock to break and slip apart or to a change its shape.
19. waves -A type of seismic wave that forms when p waves and s waves reach earth's surface.
22. - a device that records ground movement caused by seismic waves as they move through Earth.
24. -a type of seismic wave and that compresses and expands the ground.
25. -an earthquake that occurs after a larger earthquake in the same area.

1. magnitude scale - a scale that rates earthquakes by estimating the total energy released by an earthquake.
2. - the force that opposes the motion of one surface as it moves across another surface
3. isolated building - a building mounted on bearings designed to absorb the energy of an earthquake.
5. -a force that acts on rock to change its shape or volume.
6. -pulls on the crust, stretching rock so that it becomes thinner in the middle.
11. -the point on earth's surface directly above an earthquake's focus.
12. wall -the block of rock that forms the lower half of a fault.
14. -the record of an earthquake's seismic waves produced by a seismograph.
15. fault -a type of fault in which rocks on either side move past each other sideways with little up or down motion.
18. wall - the block that forms the upper half of a fault.
19. -s waves are seismic waves that vibrate from side to side to side as well as up and down.
20. -the process by which an earthquake's violent movement suddenly turns lose soil into liquid mud.
21. fault -In a normal fault,the fault is at an angle,so one block of rock lies above the fault while the other block lies below the fault.
23. fault -a type of fault where the hanging wall slides upward;caused by compression in the crust.