L> Multiple choice

Multiple Choice Questions for Mass Wasting - Chapter 9

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. The most important stress opposing a slope"s shear stress is imparted by:running waterearthquakesfrost wedginggravityWater can encourage mass flow by:reducing friction between grainsundercutting a steep slopeweathering bedrock to clay mineralsall of the aboveA talus cone is produced by a:rock fallrock glidesmud flowsall of the aboveLoose, uncemented geologic material is said to be ______.liquifiedcrystallizedunconsolidatedconsolidatedWhich of the following is the most important factor in causing mass movements?temperaturepressurewater contentbulk compositionWhich of the following does not promote mass movement?steep slopesforest firesheavy rainfallall of the above promote mass movementThe process by which masses of rock and soil move downhill under the influence of gravity is called ______ . landslidingmass wastinghydraulic actionsolifluctionA hill consisting of loose, dry sand that slopes at the angle of repose and has no vegetation _______ . is stable unless over steepened by excavationmay flow if it becomes saturated with waterwill be more stable if vegetation takes root on the hillall of the aboveOne of the most effective ways to stabilize a slope is to:remove all excess vegetationincrease the rate of compaction - add watercontrol and remove waternone of the aboveThe characteristic slope of a pile of dry sand is called the ______ .angle of reposestrikeconsolidation factordipWhich of the following factors affects the maximum angle at which a slope of loose material is stable?the amount of moisturethe shape of the particlesthe size of the particlesall of the aboveDamp sand has a higher angle of repose than dry sand because of _____ .

You are watching: When dry sediment accumulates, the angle of repose represents what property of the deposit?

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cementationsurface tensionpartial meltingdissolutionSurface tension is greatest when ________ .sand is drysand is moist, but not saturated with watersand is saturated with watersand is over saturated with waterWhich of the following can trigger a landslide?an earthquakea heavy rainstormremoval of material from the base of a slopeall of theseDuring an earthquake, water-saturated sand can behave like a liquid, a process called ____ . slurrificationsolifluctionunconsolidationliquefactionWhich of the following statements about mudflows is false?mudflows tend to move slower than debris flowsmudflows are most common in semi-arid regionsmudflows contain large amounts of watermudflows can carry large bouldersWhich of the following mass movements is the fastest?mudflowsdebris avalanchesoil creepearthflowWhat is the dominant force that causes mass movement?tidal forcesseismic energy releasegravitywindWhich of the following processes is not strongly influenced by gravity?flow of glacial icemovement of landslides and debris slidesmovement of water in streamsall of these are strongly influenced by gravityWhich of the following statements is false?round debris forms steeper slopes than angular debrislarge debris forms steeper slopes than small debrisdry debris forms steeper slopes than water-saturated debrismoist debris forms steeper slopes than dry debrisWhich of the following situations is least likely to result in mass movement?a steep slopea slope with loose material saturated with watera slope with abundant vegetationa slope consisting of fractured and deformed rockWhich of the following has the steepest angle of repose?fine quartz sandcoarse quartz sandangular quartz pebblesall of these have the same angle of reposeWhich of the following situations is most likely to undergo mass wasting?a dry moderate slope of unconsolidated materiala wet, moderate slope of unconsolidated materiala dry, steep slope of unconsolidated materiala wet, steep slope of unconsolidated materialAs the amount of water in a pile of quartz increases, the angle of repose will _______.increasedecreasefirst increase and then decreasenot changeWhich of the following rock types forms the steepest slopes?graniteshalevolcanic ash bedsall of these rock types form steep slopesWhich of the following slopes is least stable?a slope where the sedimentary layers dip parallel to the slopea slope where the sedimentary layers are horizontala slope where the sedimentary layers dip perpendicular to the slopeall of these slopes have the same stabilityMost of the damage associated with the 1964 Anchorage, Alaska earthquake was caused by _______>ground shaking during the earthquakea volcanic eruption triggered by the earthquakea tsunami (tidal wave) triggered by the earthquakelandslides triggered by the earthquake
In the cross section above of the upper part of the Grand Canyon, units B and D are most likely composed of ________.granitelimestonesandstoneshaleWhich of the following processes was the major reason why so many landslides occurred during the 1964 Anchorage, Alaska earthquake?motion along the fault oversteepened slopeswater-saturated sandy layers became liquified by the ground shaking the earthquake tilted the rock layers downhillthe earthquake caused water to accumulate in the soilHow do geologists classify mass movements?by the speed of the mass movementby the nature of the materialby the nature of the movementall of these
How would a debris avalanche be classified in this table?box cbox fbox ibox lHow would a mudflow be classified in this table?box abox bbox gbox hHow would a slump be classified in this table?box bbox ebox hbox kHow would creep be classified in this table?box abox ebox gbox kHow would a rock avalanche be classified in this table?box bbox cbox ebox fThe accumulation of rocks at the base of a cliff is called _______.a dunesoil creepan alluvial fantalusWhat is the difference between an earthflow and a debris flow?Earthflows travel faster than a debris flowEarthflows travel slower than a debris flowEarthflows consist of finer material than debris flowsEarthflows consist of coarser material than debris flowsHow fast is soil creep?a1 to 10 millimeters per year1 to 10 meters per year1 kilometer per hourover 10 kilometers per hourWhich of the following types of mass movement could a person not outrun?slumpsoil creepdebris flowdebris avalancheWhy are mudflows and debris avalanches common on volcanic slopes?because there is abundant unconsolidated volcanic ashbecause earthquakes associated with volcanic eruptions can trigger mass movementsvolcanic eruptions trigger melting of ice and snowall of theseA slow slide of unconsolidated material that travels as a unit is called ______.slumpsoil creepdebris flowdebris avalancheSolifluction may occur when ________..the surface layer freezes while the deeper soil remains unfrozenthe surface soil layer thaws while the deeper soil remains frozen rapid downhill movement of unconsolidated material moving as unitrapid downhill movement of unconsolidated material moving like a fluid_______ only occurs in permafrost regions.soil creepliquefactionsolifluctionlandslidesWhy are few mass movement preserved in the geologic record?mass movements have only occurred recently due to human activitiesmass movement deposits erode easilymass movements were rare in the past due to low rainfallmas movement deposits are destroyed by large animalsMass movements frequently occur at which of the following plate tectonic settings?convergentdivergenttransformall of the aboveTry These Fill-Ins