Practice_Quiz_2 w: HLed answers

Practice_Quiz_2 w: HLed answers - November 3 2009 100...

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November 3, 2009 W Name (printed)______________________________________ 100 points Page 1 of 5 GEO 303, Quiz 2 INSTRUCTIONS : (i) Print and bubble in your name and student number on the answer sheet. (ii) Write "W" (for white exam) in the upper-right corner of your answer 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) answer. (iv) Turn in this exam copy and your answer sheet together, with your name on both. 1. Approximately how much sediment does the Mississippi River deliver to the Gulf of Mexico each day? (A) one thousand 10 3 metric tons; (B) one million (10 6 ) metric tons; (C) one billion (10 9 ) metric tons. (D) There is no reasonable way to estimate this quantity. 2. Consider the travel speed and direction of particle vibration of seismic P waves. Which answer is correct? Speed Direction that individual particle vibrates (A) faster than S waves and parallel to wave travel; (B) slower than S waves and parallel to wave travel; (C) faster than S waves and perpendicular to wave travel; (D) slower than S waves and perpendicular to wave travel. 3. All but one of these evidences are used to trace the evolutionary relationships among organisms. Which one is the exception? (A) tooth-marks of one animal in fossil bones of another; (B) sequences of genetic (DNA) coding; (C) sequences in embryonic developmental stages; (D) comparisons of fossil skeletal structures. INSTRUCTION: Questions 4 through 6 refer to the cross section through a stream. 4. In which location does water flow the fast- est under normal conditions? In: (A) location I; (B) location II; (C) location III. (D) Not possible to tell because flow velocity depends on what’s happening upstream. 5. What is the predominant kind of sediment you would expect to find at location IV? (A) clay; (B) silt; (C) sand; (D) cobbles. 6. Over time, in which direction will this channel migrate? (A) toward the left; (B) toward the right. (C) Direction of channel migration cannot be predicted from theory or observation. (D) Once a stream channel is established, no further change is possible—it would take too much energy. 7. Why is there a P-wave shadow zone between 103° and 142° distant from an earthquake focus? It is because P waves: (A) cannot travel through the outer core. (B) reflect back to the surface from the Moho; (C) experience refraction as they travel faster in the mantle but slower in the core; (D) reflect back to the surface when they reach the mantle-core boundary. 8. Animal fossils in the Middle Cambrian Burgess Shale, western Canada, are extraordinarily important because: (A) they record the origin of life on earth; (B) they are of the earliest known animals; (C) fos- silized animals with "hard parts" and ones consisting only of soft tissue (a very rare situation) are both preserved; (D) none of the fossils consists of echinoderms, arthropods, or other familiar animal groups.
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2 9. In what ways(s) did early synapsids (ancestors of mammals) differ from early diapsids (ancestors of reptiles)?
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