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1、高二英语下册Unit13theWaterPlanetWarmingup&Speaking湾里一中邓敏TeachingAimsandDemands:1.TogettheSstounderstandthemainpropertiesofwaterbyconnectingthemwithsomecommonphenomenaandlearningtoexplainthephenomena.2.Toenablethemtobeawareoftheimportanceofwater,makinggooduseofwaterinaproperwayandprotecti
2、ngwaterresources.TeachingDifficultPoint:Talkabouthowtousewaterandprotectit.Teachingimportantpoints:Makestudentsbefreetotalkaboutwaterandimprovetheiroralspeakingability.TeachingAids:Somewater,someoilandaglass;blackboardandmultimediaTeachingProcedures:Step1.Lead-in﹝5m﹞AsktheSssomeque
3、stionsasfollowsT:Waterisaroundusandinsideus.Wecan’tgowithoutwater.Qs:Whyiswatersoimportanttolivingthings?Canyoupointoutsomeofitspropertiesorcharacteristics?Suggestedvocabulary:It'scolorless,tasteless,odorlessanduniversaldissolvent.Itfeelswet;Itexistsinthreeforms:liquid,solid,gas,an
4、discycledthroughthewatercycle;Itcanabsorbalargeamountofheat;Itstickstogetherintobeadsordrops;It'spartofeverylivingorganismontheplanet;etc.AskstudentsthenamesofOceansandContinents:ThePacificOcean,theAtlanticOcean,theIndiaOcean,theArcticOcean;Asia,Africa,Europe,theNorthAmerica,theSou
5、thAmerica,Antarctica,OceaniaStep2.Warmingup﹝useanexperimenttoshowthepropertiesofwater﹞﹝15m﹞Usethewater,theoilandtheglasstodothreeexperiments.Learnmoreaboutwater’spropertiesbydoingsomesimpleexperimentsandlearntodescribeanexperiment.Whatpropertyofwaterdoeseachofthefourexperimentsillu
6、strate?Whatcausesthisphenomenon?What’sthisphenomenonrelatedto?①Experiment1showshowairpressurecausesapieceofthickpapertoclingtoanupturnedglassofwater.②Experiment2illustrateshowsubstanceswithdifferentdensitybehavewhenplacedinthesamecontainer.2③Experiment3isanexampleofhowwaterdissolve
7、ssubstancesandobjects.④Experiment4illustratessomeofthedifferencesbetweensaltwaterandfreshwater.Step3.Speaking1.Pre-speaking﹝5m﹞1)Doyouagreewiththesaying“Withoutwater,lifewouldnotexist.”?2)SonotonlyyouandIagreewiththisopinion,butalsotheUnitedNationsholdthesameview.Andthat’swhywehave
8、WorldWaterDay.Q:Isthereany
