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Unformatted text preview: tern. As each source is activated, it generates a instruments wave train that moves downward at a speed dete rmined A presence of unrelated wave trains uniquely by the rock's elastic characteristics. As rock B placement of the seismic instruments interfaces are crossed, the elastic characteristics C properties of rocks through which the wave encountered generally change abruptly, which causes part train has traveled of the energy to be reflected back to the surface, where it is
recorded by seismic instruments. The seismic records must 5. It can be inferred from the passage that the seismic- be processed to correct for positional differences between reflection method would be likely to yield an inaccu- the source and the receiver, for unrelated wave trains, and rate physical profile of the subsurface in which of for multiple reflections from the rock interfaces. Then the the following circumstances? data acquired at each of the specific source locations are (A) If the speed at which the wave train moved combined to generate a physical profile of the subsurface, downward changed which can eventually be used to select targets for drilling. (B) If the receiver were not positioned directly at (162 words) the wave-train source
(C) If the rock on one side of a rock interface had
similar elastic characteristics to those of the
rock on the other side
(D) If the seismic records obtained for the different
sources in a grid were highly similar to each other
(E) If there were no petroleum deposits beneath the
area defined by the grid of wave -train sources
6. Which of the following best describes the
organization of the passage?
(A) A method is criticized, and an alternative is
(B) An illustration is examined, and some errors are
(C) An assertion is made, and a procedure is
(D) A series of examples is presented, and a
conclusion is drawn.
(E) A hypothesis is advanced, and supporting
evidence is supplied. 138 Paradoxically, with all of our natural, intuitive, 7. The author refers to people who are attracted to commonsense capacity to grasp human relations, the "pessimistic, debunking writings" in order to support science of human relations has been one of the last to which of the following ideas? develop. Different explanations of this paradox have been (A) Interesting books about human relations are suggested. One is that science would destroy the vain and typically pessimistic. pleasing illusions people have about themselves; but we (B) People tend to ignore scientific explanations might ask why people have always loved to read of human relations. pessimistic, debunking writings, from Ecclesiastes to (C) People rarely hold pleasing illusions about Freud. It has also been proposed that just because we themselves. know so much about people intuitively, there has been (D) A scientific approach human relations less incentive for studying them scientifically; why would undermine the pleasing illusions people should one develop a th...
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This document was uploaded on 09/16/2013.
- Fall '13