Earthquakes Exam 1b

Earthquakes Exam 1b - EARTHQUAKES AND NATURAL DISASTERS...

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EARTHQUAKES AND NATURAL DISASTERS, GEOL 171 EXAM #1 THURSDAY, SEPTEMBER 22, 2005 Instructions : Use a #2 pencil. On the bubble sheet, print and darken the NAME and 7-digit ID # at the appropriate spaces and bubbles; LEFT JUSTIFY the ID #. (If we have to manually enter your grade due to incorrect darkening of name or ID # bubbles, 3% will be subtracted from your grade for this exam .) There are 80 questions, most of them offering 5 possible choices. Choose the one you believe best fits as an answer. Read each question carefully before selecting the best answe r. Save the exam as a study guide for the final exam; key will be posted on Blackboard. Good Luck 1. Which of the following is not a basic tenet of plate tectonics? A. The slab pulled into the asthenosphere begins the process of reabsorption into the mantle. B. The slab pulled into the asthenosphere begins the process of melting and moves into the liquid core. C. The new lithosphere slowly moves laterally away from the zones of oceanic crust formation on top of the underlying asthenosphere (seafloor spreading). D. Melted asthenosphere flows upward as magma and cools to form new ocean floor lithosphere. E. When the leading edge of a moving slab of oceanic lithosphere collides with another slab, the older, colder, denser slab turns downward and is pulled by gravity back into the asthenosphere (subduction), while the less-dense, more buoyant slab overrides it. 2. In 1985, as a result of the Michoacan earthquake many buildings collapsed and killed about 8000 people in Mexico City, even though the city lies 350 miles from the epicenter. This was caused by all but which of the following? A. improperly designed buildings B. collapse of thousands of single-story frame houses C. soft lake-sediment foundations D. resonance between seismic waves 3. With compressional forces, the hanging wall moves upward relative to the footwall; this type of fault is referred to as a __________fault. A. normal B. reverse C. strike-slip D. subnormal E. transform 4. The early differentiation of the Earth into a mantle and a core was created by __________________. A. gravitational accretion of iron-rich particles in the core, followed by silicate-rich particles in the mantle. B. the buildup of heat and the melting of iron which was pulled by gravity to the center of the Earth. C. nuclear fission in the center of the Earth, which converted hydrogen and helium to iron.
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5. Faults that rupture for shorter distances and shorter times produce increasingly greater amounts of _________ seismic waves. A. fault rupture does not affect earthquake frequencies B. high and low frequency C. high frequency D. low frequency 6. Iceland lies at a ____________ experiencing __________ earthquakes A. convergent boundary / large B. convergent boundary / small C. spreading center boundary / large D. spreading center boundary / small 7. The blanket of sediment on the sea floor is ___________ toward the ocean margins.
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This note was uploaded on 05/12/2008 for the course GEOL 171 taught by Professor Tsoflias during the Spring '08 term at Kansas.

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Earthquakes Exam 1b - EARTHQUAKES AND NATURAL DISASTERS...

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