Handout 3 (2-3) green“Recording Earthquakes”
Standard 2 Objective 3
a, b, d, and e
1. A seismograph is an instrument thatrecords vibrations
•A. in the ground.
2. Scientists who study earthquakesare interested in the amount of
•C. energy released by an earthquake.
3. magnitude
a.
the amount of damage caused by an earthquake
4. Richter scale
b.
the measure of earthquake strength based on thesize of the area of the fault that moves, theaverage distance that the fault block moves, andthe rigidity of the rocks in the fault zone
5. moment magnitude
c.
the measure of the strength of an earthquake
6. intensity
d.
a measurement system that expressesearthquake intensity in Roman numerals anddescribes the effects of each intensity
7. Mercalli scale
e.
a measurement system that bases earthquakestrength on ground motion
Matching #’s 3-7
8. The Richter scale and the momentmagnitude scale provide similar values forwhat?
•Small earthquakes
9. The moment magnitude scale ismore accurate for measuring what?
•Large earthquakes
10. What is the highest momentmagnitude recorded for an earthquake sofar?
•9.5 1960 Valdivia earthquake Chile
11. How is Intensity XII described on themodified Mercalli intensity scale?
•Total destruction
12. Upon what does the intensity of anearthquake depend?
•Magnitude, the distance between theepicenter and the affected area, the localgeology, and the earthquakes duration.
Chapter 12 Section 3
Earthquakes and Society
13. What causes most injuries duringan earthquake?
•The collapse of buildings and other structuresof falling objects and flying glass.
14. Name four other dangers thatresult from earthquakes.
•Landslides, explosions, fire, broken gas lines.
15. Most buildings are not designed towithstand the
•A. swaying motion caused by earthquakes
16. During an earthquake, buildingswith weak walls
•B. may collapse completely.
17. What can affect the way that abuilding responds to seismic waves?
•B. the type of ground beneath the building.
18. What would a building likely to bedamaged during an earthquake be builtupon?
•Loose soil and rock
19. Where could a destructiveearthquake take place?
•B. in any region of the United States
20. In what geographic areas in the UnitedStates are destructive earthquakes morelikely to occur?
•d. California or Alaska
21. Earthquake safety rules may help
•C. prevent death, injury, and propertydamage.
22. Before an earthquake occurs,people should
•B. be prepared.
23. Which of the following supplies areNOT necessary when preparing for anearthquake?
•D. piles of firewood
24. What should you stay away from ifyou are indoors during an earthquake?
•Windows, heavy furniture, and other objectsthat might topple over.
25. What should you check for after anearthquake?
•Fire and other hazards
26. What should you always avoidafter an earthquake?
•Downed power lines and objects that aretouching them
27. Earthquake prediction is mostlyunreliable because not all earthquakeshave ____________ or other precursors.
•foreshocks
The End!!!
