Pearson 6th Earth Science terms and defintions

2. 1. ______-places in the Earth’s crust where rocks have broken apart faults

3. A. ______ _____- areas where tension forces cause rock above the fault surface to move downward normal faults

4. 1)____________- a block of rock that forms the upper half of the fault 2)____________- a block of rock that forms the lower half of the fault hanging wall footwall

5. B. _______ _____- areas where compression forces cause rock above the fault to move _________ reverse fault upward

6. C. ________________- areas where shearing forces cause plates to move sideways past each other (horizontally) strike-slip fault

7. Reverse

8. 2. _____________- energy waves produced by an earthquake; earthquakes are the vibrations felt when this movement happens. seismic waves

11. C. _____________- energy that travels out from the epicenter surface waves

13. 3. ______- point in the Earth’s interior where the energy is released during an earthquake focus

14. 4. _________- point on the Earth’s surface directly above the focus epicenter

15. 5. ___________- an instrument that measures earthquake activity seismometer

18. 6. __________- measure of the energy released by an earthquake activity magnitude

20. 7. _____________- describes how much energy is released during an earthquake; for each 1.0, the amplitude of the largest surface wave is 10 times greater; 32 times as much energy is released for each 1.0 increase Richter Scale

21. 8.__________- assesses _______; rates from I to XII; based on intensity (amount of damage) Mercalli damage

22. Damaging Earthquake in the US (1750 - 1996)

24. 9. ____________- occurs when wet or soft soil becomes more like a liquid from shaking (like a milkshake) liquefaction

25. 10. ________- huge ocean waves caused by seismic activity tsunami

27. Tsunami- Dec. 26, 2004 http://dsc.discovery.com/convergence/tsunami/videogallery/videogallery.html Other sites http://dsc.discovery.com/convergence/tsunami/interactive/interactive.html

28. The End