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Questions6to10arebasedonthefollowingpassage:
Morethanacenturyago,therelationshipbetweenglacialiceandtheamountofwaterintheoceanbasinswasfirstseen.Whenthegreaticesheetcoveredvastlandareas,thesealevelwasloweredbecausethenormalreturnofwaterfromlandtotheoceanwasreduced.Asaresult,thesealevelroseasIceAgeglaciersmeltedallowingthemeltedwaterstoflowintotheocean.Ifalltheglacialiceonthesurfaceoftheearthtodayshouldmelt,thesealevelmightrisebymorethan150feet.Shorelinevariationsarealsoproducedthroughelevationordepressionoftheland.Duringtimesofglacierformationsthegreatweightoftheiceslowlydepressedtheearth'scrust.Removaloftheweightthroughglaciermeltingallowedtheslowreturnofthecrusttoitsformerposition.ChangesintheGreatIceclimatesfromcoolandwettowarmanddryproducedclimatechangesfarfromtheglaciatedarea.Forexample,attimesofcool-wetglacialclimates,levelsofinlandlakesrose,incontrasttothedepressionofsealevel.Duringthewarm-dryinterglacialclimates,lakelevelswerelowered.TheancientlakeBonneville,largestoftheglaciallakesinWesternUnitedStates,oncecoveredmorethan20,000squaremiles.Ithadamaximumdepthofmorethan1,000feet.GreatSaltLakeinUtahistheshrunkenremnantofthisoncelargelake.
Althoughthefirsttimethatearlymanwalkedontheearthisuncertain,heislargelyaproductoftheGreatIceAge.Presentinformationshowsthatduringthistimeheevolvedrapidlybothphysicallyandculturally.HismostprimitivetoolsandskeletalremainshavebeenfoundinsomeoftheoldestdepositscontemporarywiththeGreatIceAgeinAfrica,AsiaandEurope.Theseareoftenassociatedwithremainsofextinctanimals.Withthedisappearanceofthegreaticesheets,theBronzeandIronAgeculturesevolved.Aboutthistimemanyanimalssuitedtocoolerclimatesdied.
Althoughmuchremainstobelearned,thestoryoftheGreatIceAgeisbeingunfoldedthroughtheeffortsofspecialistsinmanyfields.Recordingfieldobservation,newtheoriesandmethods,andworldwidestudiesofexistingglaciersarebringingaclearerunderstandingoftheGreatIceAge.
6.WhichofthefollowingisNOTimpliedinthepassage?
A.ManhasalotmoretolearnabouttheGreatIceAge.
B.Theartofmakingtoolswasinstrumentalinbringingabouttheevolutionofhumanbrain.
C.ManyspecieswerenotsuitedtothewarmerclimatesoftheBronzeandIronAge.
D.Therelationshipbetweenglacialiceandtheamountofwaterintheoceanbasinswasnotseenuntilmorethanahundredyearsago.
7.Accordingtothearticle,whichofthefollowingwillinducethedepressionofsealevel?
A.formationofgreatmassesoficesheetontheland
B.precipitation
C.shorelinevariations
D.theadventofwarm-dryinterglacialclimates
8.WhydoestheauthorcitetheexampleoftheGreatSaltLakeinUtah?
A.toshowthatitisalakecreatedintheGreatIceAge
B.toshowthatitoncewasthelargestlakeintheUnitedStates
C.toshowthatitevolvedfromtheBronzeandIronAge
D.toshowthatitiswhatremainedoftheoncelargelakeBonneville
9.Whichofthefollowingcanbelearnedaboutearlymanbasedontheinformationprovidedinthepassage?
A.TheexacttimeofhisappearanceontheEarthisuncertain.
B.HeevolvedrapidlyphysicallyandculturallyduringtheBronzeandIronAge.
C.Theabilitytomakeprimitivetoolsdistinguishedmanfromotheranimals.
D.Earlymanlivedmainlyonanimalshunted.
10.ThebestsourceofinformationabouttheGreatIceAgeisobtainedfrom_____.
A.rockformations
B.fossilremains
C.primitivetoolsusedbyearlyman
