Chapter 9

1. / measures and records ground motion and can be used to determine the distance seismic waves travel
5. Cones / small steep sided volcanoes that erupt gas rich basaltic lava
9. Ash / tiny particles of pulverized volcanic rock
11. / these waves originate where rocks first move along the fault, at a location inside Earth
13. / the location on Earths surface directly above the earthquakes focus
14. / Molten rock that erupts onto Earths surface
15. / scientist that study earthquakes
16. Waves / P-waves cause particles in the ground to move in a push pull motion similar to a coiled spring
18. Waves / causes particles in the ground to move up and down in a rolling motion
19. / break in the Earths lithosphere where one block of rocks moves toward, away from, or past another

2. / a graphical illustration of seismic waves
3. / the vibrations in the ground that result from the movement along breaks in the Earths lithosphere
4. / a vent in Earths crust through which meted or molten rock flows
6. / volcanoes that are not associated with plate boundaries
7. / liquids resistance to flow
8. Waves / energy that travels as vibrations on and in the Earth
10. Volcanoes / are large steep sided volcanoes that results from explosive eruptions
12. Waves / s-waves are slower than P-waves they cause particles to move up and down at right angles relative to the direction the wave travels
17. / molten rock below Earths surface
18. Volcanoes / common along divergent plate boundaries and oceanic hot spots