Exam_3_2008_-b - Name: Geology 101 Exam 3 Friday, November...

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Name: Geology 101 Exam 3 Friday, November 21, 2008 This exam consists of 40 multiple-choice questions. Only one answer of the four given is correct. Blacken the appropriate circle on your computer form to indicate your selection. Erase completely any stray marks on the form. NOTE : There are only four responses on your exam and ±ve on the computer form. Never blacken the ±fth circle on the computer form. 1. The earth's outer core is thought to be liquid because: a. S-waves do not pass through it b. P-waves do not pass through it c. neither P- nor S-waves pass through it d. both P- and S-waves slow down as they pass through it 2. The epicenter of an earthquake is de±ned as: a. the place inside the earth where an earthquake started b. the place on the earth's surface where the most damage occurred c. the place on the earth's surface directly above the focus of the earthquake d. the region with the highest Mercalli intensity 3. P-wave velocity is 8 km/sec. S-wave velocity is 3 km/sec. If the P-wave arrives at a seismographic station 5 seconds ahead of the S-wave, how far away was the earthquake? a. 15 km b. 24 km c. 30 km d. 48 km 4. Man's attempts to stabilize beaches: a. usually ends up destroying the beach b. have largely been successful c. have led to a rapid expansion of beachfront development d. have been relatively inexpensive at this point 5. Which of the following statements is true? a. the focus of an earthquake is the point on the earth's surface directly above the epicenter b. the magnitude of an earthquake is related to the length of the fault segment that slipped
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c. the largest recorded earthquake occurred in Alaska in 1964 d. tsunamis occur primarily in the middle of continents 6. A magnitude 8 earthquake has how many times more ground shaking than a magnitude 4 earthquake? a. 4 b. 40 c. 400 d. 10,000 7. If an earthquake has a shallow focus, it could have occurred at a: a. convergent plate boundary b. divergent plate boundary c. transform plate boundary d. all of the above 8. Impermeable rock strata or sediment that do not transmit groundwater freely are called: a. perched water tables b. aquicludes c. springs d. aquifers 9. Which one of these statements is true concerning P-waves? a. travel only in solids b. travel faster than S-waves c. are responsible for most of the destruction associated with an earthquake d. cannot be recorded on a seismograph 10. If a shoreline contains several wave cut benches that are at successively higher elevations going inland, a possible interpretation is: a. that sea level is rising in this area b. that the shoreline has been uplifted
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Exam_3_2008_-b - Name: Geology 101 Exam 3 Friday, November...

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