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Pts Which Of The Following Statements Is True Of College Rock?

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Multiple Choice Questions for Earthquakes – Chapter 16

Each chapter will include a few questions designed to test your knowledge of material covered in the chapter and in the Internet-based resources. Your answers are not being recorded. Try the following. Which of the following describes the build up and release of stress during an earthquake?the Modified Mercalli Scalethe elastic rebound theorythe principle of superpositionthe travel time differenceThe amount of ground displacement in a earthquake is called the _________ . epicenterdipslipfocusThe point where movement occurred which triggered the earthquake is the _______ . dipepicenterfocusstrikeWhich of the following sequences correctly lists the different arrivals from first to last?P waves … S waves …. Surface wavesSurface waves … P waves …. S wavesP waves … Surface waves …

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S wavesS waves … P waves …. Surface wavesHow do rock particles move during the passage of a P wave through the rock?back and forth parallel to the direction of wave travelback and forth perpendicular to the direction of wave travelin a rolling circular motionthe particles do not moveDetailed studies of what earthquake allowed researchers to develop the elastic rebound theory?. the 1906 San Francisco earthquakethe 1964 Anchorage, Alaska earthquakethe 1755 Lisbon, Portugal earthquakethe 1985 Mexico CIty earthquakeHow many seismograph stations are needed to locate the epicenter of an earthquake?1234Earthquakes can occur with _________ faulting.normalreversethrustall of theseApproximately what percentage of earthquakes occur at plate boundaries?25%50%75%90%Which type of faulting would be least likely to occur along the mid-Atlantic ridge?normalreversetransformall of these could occurHow often do magnitude 8 earthquakes occur?about 5 to 10 times per yearabout once a yearabout every 5 to 10 yearsabout every 50 to 100 yearsThe bulk modulus measures ______________. the resistance to flow of a liquidthe resistance to change in colorthe resistance to change in volumethe resistance to change in shapeThe shear modulus measures _____________ . the resistance to flow of a liquidthe resistance to change in shapethe resistance to change in volume of a liquidthe resistance to change in volume of a solidIf only density increases with increasing depth within the Earth, the velocity of a P wave should ___________ .stay the sameincreasedecreaseIf a P wave were to go from a solid to a liquid – what would happen to itsvelocity?stay the sameincreasedecrease to 0.0decrease If an S wave were to go from a solid to a liquid – what would happen to its velocity?stay the sameincreasedecrease to 0.0decreaseWhich boundary marks a change from 100% solid to 100% liquid?mantle … outer corelithosphere … asthenospherecrust … mantlenone of theseBody waves consist of the:P waves onlyS waves onlyP and S wavesSurface wavesWith increasing travel time the difference in arrival times between the P and the S waves _________ increasesdecreasesstays constantnone of the aboveEarthquake A has a Richter magnitude of 7 as compared with earthquake B”s 6. The amount of ground motion is one measure of earthquake intensity.A is 10X more intense than BA is 1000 more intense than BRichter magnitude does not measure intensityB is 0.01X as intense than AIn general, the most destructive earthquake waves are the __________ . P wavesS wavesSurface wavesQ wavesWhere is the focus with respect to the epicenter:directly below the epicenterdirectly above the epicenterin the P wave shadow zonein the S wave shadow zone

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Point A, where slip initiated during the earthquake, is called the ________.dipepicenterfocusscarpPoint B is called the earthquake ________.dipepicenterfocusscarpPoint C is called the _________epicenterfault scarpseismic wavedip of the earthquakeWhat type of faulting is illustrated in this diagram?normalreversethrustabnormal

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What causes the up-and-down wiggles on the seismogram show above?variations in air pressureground vibrationstsunami waveselectromagnetic pulsesWhich set of waves are probably the surface waves?ABCThey are all surface wavesWhich set of waves are the P waves?ABCThey are all P wavesWhich set of waves are the S waves?ABCThey are all S wavesThe difference in arrival times between which pair of waves can be used to determine the distance to the epicenter?A and CA and BNone of the aboveHow do rock particles move during the passage of a P wave through the rock?back and forth parallel to the direction of wave travelperpendicular to the direction of wave travelin a rolling elliptical motionin a rolling circular motionHow do rock particles move during the passage of a S wave through the rock?back and forth parallel to the direction of wave travelperpendicular to the direction of wave travelin a rolling elliptical motionin a rolling circular motionWho developed the procedure used to measure the size of an earthquake?Charles RichterEdward SheridanJames HuttonArt SmithThe moment magnitude of an earthquake depends on all of the following except __.the area of the fault breakthe rigidity of the faultthe slip on the faultthe type of faultingWhich of the following measures an earthquake”s intensity based on the observed effects on people and structures?Richter scaleModified Mercalli scalethe Centigrade scalethe moment magnitude scaleShallow earthquakes, less than 20 km deep, are associated with _______.convergent plate boundariesdivergent plate boundariestransform plate boundariesall of theseWhat type of faulting would be most likely to occur along transform faults?normal faultingreverse faultingstrike-slip faultingall of these

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What type of earthquakes would most likely occur at point A?shallow-focus earthquakes caused by normal faultingshallow-focus earthquakes caused by strike-slip faultingshallow-focus earthquakes caused by thrust faultingdeep-focus earthquakes caused by thrust faultingWhat type of earthquakes would most likely occur at point B?shallow-focus earthquakes caused by normal faultingshallow-focus earthquakes caused by strike-slip faultingshallow-focus earthquakes caused by thrust faultingdeep-focus earthquakes caused by thrust faultingWhich of the following did not occur at a plate boundary?New Madrid, Missouri, 1812San Francisco, 1906Anchorage, Alaska, 1964Loma Prieta, California, 1989Which of the following can be triggered by an earthquake?tsunamiintense ground shakinga landslideall of theseWhich of the following can trigger a tsunami?undersea earthquakesundersea landslidesthe eruption of an oceanic volcanoall of theseWhich of the following waves is the slowest?P wavesS wavesSurface wavestsunamiWhich of the following statements is false?Most earthquakes occur at plate boundariesThe time and location of most major earthquakes can be predicted several days in advanceEarthquakes can be caused by normal, reverse and strike-slip faultingP waves travel faster than both S waves and Surface wavesWhich of the following observations may indicate a forthcoming destructive earthquake?An increase in the frequency of smaller earthquakes in the regionrapid tilting of the groundrapid changes in water levels in wellsall of theseWhich of the following statements best describes the state of earthquake prediction?scientists can accurately predict the time and location of almost all earthquakesscientists can accurately predict the time and location of about 50% of all earthquakesscientists can accurately predict when an earthquake will occur, but not wherescientists can characterize the seismic risk of an area, but can not yet accurately predict most earthquakesTry These Fill InsReturn to the Physical Geology Home Page

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