Earthquakes

2. -the point beneath earth's surface where rock breaks under stress and causes an earthquake.
4. -a large wave produced by an earthquake on the ocean floor.
5. -the process by which an earthquake's violent movement suddenly turns lose soil into liquid mud.
6. - a device that records ground movement caused by seismic waves as they move through Earth.
10. isolated building - a building mounted on bearings designed to absorb the energy of an earthquake.
13. -s waves are seismic waves that vibrate from side to side to side as well as up and down.
17. -squeezes rock until it folds or breaks.
19. -the shaking that results from the movement of rock beneath earths surface.
20. fault -a type of fault where the hanging wall slides upward caused by compression in the crust.
21. wall - the block that forms the upper half of a fault.
23. -an upward fold in rock formed by compression of earth's crust.
24. - the measurement of an earthquake's strength based on seismic waves and movement along faults.
25. wall -the block of rock that forms the lower half of a fault.
26. 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.

1. -pulls on the crust, stretching rock so that it becomes thinner in the middle.
3. fault -a type of fault in which rocks on either side move past each other sideways with little up or down motion.
7. - a large area of flat land elevated high above sea level.
8. -a force that acts on rock to change its shape or volume.
9. -a type of seismic wave and that compresses and expands the ground.
11. - a downward fold in rock formed by compression in earth's crust.
12. scale -A scale that rates earthquakes according to there intensity and how much damage they cause at a particular place.
14. magnitude scale - a scale that rates earthquakes by estimating the total energy released by an earthquake.
15. -shearing can cause rock to break and slip apart or to a change its shape.
16. waves -A type of seismic wave that forms when p waves and s waves reach earth's surface.
18. -the record of an earthquake's seismic waves produced by a seismograph.
19. -the point on earth's surface directly above an earthquake's focus.
22. scale - a scale that rates an earthquake's magnitude based on the size of its seismic waves.
25. - the force that opposes the motion of one surface as it moves across another surface
27. -an earthquake that occurs after a larger earthquake in the same area.