Earth’s History Test Prep - mrgsearthsciencepage

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1、Earth’sHistoryTestPrepBaseyouranswerstothefollowingthreequestionsonthediagrambelowofacrosssectionofaportionofEarth’scrust.LettersAthroughDrepresentlandscapefeatures,andnumbers1through7representrocklayers.Thedetailshowsafossilfoundinlayer3.Whatisthecorr

2、ectsequenceofeventsfromoldesttomostrecentinthegeologichistoryofthisarea?1depositionoflayersfrom1to7®intrusionofbasalt®faulting2depositionoflayersfrom1to7®faulting®intrusionofbasalt3depositionoflayersfrom7to1®intrusionofbasalt®faulting4depositionoflayer

3、sfrom7to1®faulting®intrusionofbasaltThefossilfoundinlayer3indicatesthattheageofthisshalelayerisapproximately(1)70millionyears(2)220millionyears(3)430millionyears(4)520millionyearsWhichlandscapefeaturesprovideevidencethatweatheringanderosionwerelikelyto

4、haveoccurred?(1)AandD,only(2)BandC,only(3)A,C,andD,only(4)A,B,C,andDAbonesamplecontainsonlyofitsoriginalradioactiveC14content.Howoldisthebonesample?(1)1C14half-life(2)2C14half-lives(3)9C14half-lives(4)4C14half-livesTheshadedportionofthemapbelowofNorthA

5、mericashowsareasbelievedtohavebeenbelowsealevelduringthePennsylvanianPeriod.PointAisalocationintheinlandsea.Present-dayevidenceoftheexistenceoftheinlandseaduringthePennsylvanianPeriodisbestprovidedby1marinefossilsatpointA2seawateratpointA3metamorphicro

6、ckatpointA4terrestrialrockatpointAWhichtypeofrockismostlikelytocontainfossils?1granite2gneiss3shale4metaconglomerateWhyareradioactivesubstancesusefulformeasuringgeologictime?1Theratioofdecayproductstoradioactivesubstancesremainsconstantinrocks.2Thehalf

7、-livesofradioactivesubstancesareshort.3Samplesofradioactivesubstancesareeasytocollectfromrocks.4Radioactivesubstancesundergodecayatapredictablerate.Baseyouranswerstothefollowing5questionsusingtheEarthScienceReferenceTables,theblockdiagramandthecrosssec

8、tionbelow,andyourknowledgeofEarthscience.TheblockdiagramshowsthepresentpositionofNiagaraFallsinrelationtotheNiagaraEscarpment.Thecrosssectionshowsthegeneralbedrockstructureofpresent-dayNiagaraFalls.WhatistheapproximateageoftheQueenstons