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QR-6 Earthquakes and the Earth’s Interior Answer each of the following questions and staple all separate pieces of paper as one complete packet. 1. Preview the chapter by locating 5 diagrams that catch your interest. Indicate which diagram you have located, and write a “paraphrased” statement describing each diagram. Answer the following chapter questions. 1. 2. 3. 4. What is an earthquake? Under what circumstances do earthquakes occur? How are faults, foci, and epicenters related? Sketch or explain what is meant by the elastic rebound theory. Faults that are experiencing no active creep may be considered safe. Rebut or defend the statement. 5. Why the San Andreas is sometimes referred to as fault system? 6. Describe the principle of a seismograph 7. List the major differences between P,S, and surface waves. 8. Which types of seismic waves tend to cause the greatest destruction to buildings? 9. Briefly describe the triangulation method used to determine the epicenter of an earthquake. 10. Describe the differences between the Modified Mercalli Intensity Scale, Richter Scale, and the moment magnitude scale. 11. How much more energy does an earthquake measuring 7.0 on the Richter Scale release compared to an earthquake with a magnitude of 6.0. 12. Where does the greatest amount of seismic activity occur? 13. What type of plate boundary is associated with Earth’s largest earthquakes? 14. What is a tsunami? How is one generated? 15. Are accurate, short-range earthquake predictions possible using modern instruments? 16. What is the value of long-range earthquake forecasts? 17. Briefly describe how seismic waves are used to probe the Earth’s interior. 18. How do continental crust and oceanic crust differ? 19. Contrast the physical makeup of the asthenosphere and the lithosphere. 20. How are the inner and outer cores different? How are they similar?