Practice Quiz - April 7, 2004 100 points Page 1 of 4 W Name...

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April 7, 2004 W Name (printed)______________________________________ 100 points Page 1 of 4 GEO 303, Quiz 2 INSTRUCTIONS : (i) Print and bubble in your name and student identification ( not your social secu- rity number) on the answer sheet. (ii) Write "W" (for white exam) in the upper-right corner of your an- swer sheet. (iii) Answer the questions by blackening the "bubbles" on the answer sheet. Each question is worth 2.5 points. If more than one answer is correct, choose the best (most inclusively correct) an- swer. (iv) Turn in this exam copy and your answer sheet together, with your name on both. 1. Why can't S-waves travel through the outer core of the earth? (A) The outer core is liquid. (B) The core is too deep for S-waves to reach it. (C) The outer core is made of iron, and thus it is too dense for S-waves to travel through it. (D) A shadow zone blocks S-waves from reaching the core. 2. Oceanic crust is formed of: (A) basalt underlain by gabbro; (B) a rock close to granite in composi- tion; (C) layers of basalt and rhyolite; (D) mostly metamorphic rock. 3. All but one of the following are characteristics of vertebrate animals. Which one is the exception? All vertebrates possess: (A) a notochord during embryonic development; (B) paired appendages (fins, flippers, wings, legs, arms); (C) segmented bones and muscles; (D) a body plan with radial symmetry. 4. The deepest earthquakes occur: (A) near the Moho; (B) near 100 km depth in the earth; (C) near 650 km depth; (D) at the boundary between mantle and core. 5. Which one of the following vertebrates is the best example of a "living fossil" (representing a line of descent persisting many millions of years with very little evolutionary change)? (A) Archaeopteryx , a transitional dinosaur-bird; (B) Ichthyostega , a transitional fish-tetrapod; (C) horses; (D) sharks and other cartilaginous fish. 6. In a region where rock is being compressed, what kind of earthquake event would you expect to see? (A) normal event; (B) strike-slip event; (C) thrust event; (D) transform fault event. 7. If scientists determine that the Himalaya mountains are in "isostatic equilibrium," then what does this imply? (A) The Himalaya mountains must be continually growing. (B) The density of rock at some depth beneath the Himalaya mountains must be less than the surrounding rock at that depth. (C) At a constant altitude, the strength of gravity is lower over the mountains than over the surrounding areas. (D) In spite of erosion, these mountains will remain at the same altitude over time. 8. Limestone strata are exposed in a road cut just west of Austin, and in a quarry 30 miles to the north- west. Which one of the following is the least reliable means to decide that strata in the two localities correlate (are equivalent)? (A) Both localities lie at approximately 850 feet above sea level. (B) At the two localities the rocks look the same, and also the formations lying above and below look the same. (C) You could walk across the countryside, tracing the strata from one locality to the other.
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This test prep was uploaded on 03/19/2008 for the course GEO 303 taught by Professor Leon during the Fall '08 term at University of Texas.

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Practice Quiz - April 7, 2004 100 points Page 1 of 4 W Name...

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