人教版高二英语Unit 13 The water planet全套教案

人教版高二英语Unit13Thewaterplanet全套教案Taskswhichshouldbeachievedinthisunit:a.Achievelanguageskillsandrelatedknowledgeaboutthetopicofwaterandtheocean.b.Learnhowtomakesuggestionsandhowtoexpressopinions.Thewaterisbeingusedto/for….Weshould/could….Ifwe…,wecan….Itwouldbebetterto…c.Vocabularyinthisunit:benefit,disadvantage,range,available,pure,mass,float,absorb,stable,bottom;d.Usefulexpressions:benefitfrom,rangefrom…to….,alltheway,bemadeupof,thatis,freezingpoint,breakdown,mixwith,bemeasuredin…,takeadvantageof…,keep…steady,managetodo.e.Grammar:ReviewModalVerbs.情态动词can,could,may,might,will,would,shall,should,must,can’t等的用法。1)can/couldJincanspeakEnglishwell.(ability)CouldyoupleaseshowmethewaytoBeihaiPark?(request)2)may/mightMayweseetheawardsfortheteams?(permission;request)Shemightgiveyousomenewclothing.(possibility)3)will/wouldTheSpringFestivalisthemostfun.Thewholefamilywillcomefordinner.(promise;agreement)Oftenhewoulddressuplikearichman.(pasthabit;custom)4)shall/shouldTheharvestfestivalbeginsonSaturday.Weshallbetherewithourfriends.(promise;agreement)Youshouldarriveattheairporttwohoursbeforehegoes.(advice)5)must/can’tWangFengwinsanawardeveryyear.Hemustbeverystrong(speculation)Youmustbejoking.Thatcan’tbetrue.(guessing)TheFirstPeriodTeachingAims:1.Learnandmasterthenewwordsandtheusefulexpressionsofthispart.Words:cube,sailor,disadvantages,entertainmentPhrases:comeupwith,happentoUsefulexpressions:Thewaterisbeingusedto/for…Weshould/could…Ifwe…wecan…Itwouldbebetter…2.Learnsomethingaboutwaterbydoingexperiment.3.Dosomelistening.4.Improvethestudents’speakingabilitybytalking.TeachingImportantPoints:1.Makethestudentsbefreetotalkaboutwater.2.Improvethestudents’listeningabilitybylistening.TeachingDifficultPoints:1.Howtofinishthetaskofspeaking.2.Howtoimprovethestudents’listeningability.TeachingMethods:1.Listening-and-answeringactivitytohelpthestudentsgothroughwiththelisteningmaterial.2.Individual,pairorgroupworktomakeeverystudentworkinclass.TeachingAids:1.themultimedia2.theblackboard3.anemptyglass,abottleofwaterandabottleofvegetableoilTeachingProcedures:StepⅠGreetingsandLead-inT:Hello,everyone.Ss:Hello,teacher.T:Attention,please.Asweallknow,everyyearduringtheSpringFestivalandLanternFestivalinourcountry,peopleliketoseetheliondanceandguesstheriddles.Doyouliketoguesstheriddle,then?Ss:Yes.T:OK.NowIhaveariddle.Pleaseguessit.(Teacherusesthemultimediatoshowtheriddleonthescreen.)It’sveryimportanttoalltheanimalsandplants.It’salsoimportanttohumanbeings.It’sliquidatroomtemperature.Everydayyoukeepintouchwithit.Youcan’tlivewithoutit.(athing)T:What’sit?Ss:It’sveryeasy.It’swater.T:Yeah,todaywewilltalkaboutwater.Nowpleasetellmewhatyouknowaboutwater.S1:Waterisusedtodrink.S2:Watercanbeusedtowatertheflowers.S3:Ithinkwatercanbeusedtomakeelectricity.StepⅡWarmingupT:Thankyouforyourideas.Nextwewillmakesomeinterestingexperiments.Maybeyoucanlearnmoreaboutwaterfromthefollowingexperiments.S4,wouldyouliketocomeheretohelpme?S4:I’dloveto.T:Now,lookatLiLeiandme.Wewillbegin.Youshouldwatchtheexperimentcarefullyandtrytotellmewhathappensandwhy.(Teacherputsabottleofwater,abottleofvegetableoilandanemptyglassonthedesk.)T:S4,poursomewaterandsomevegetableoilintotheemptyglass.Otherstudents,pleasewatchcarefully.(Afewsecondslater.)Ss:Fantastic!Theliquidintheglasshasbecometwoparts.T:Trytodescribeitindetail.S5:Letmetry.Thepartaboveisvegetableoilandthepartbelowiswater.ButIdon’tknowwhy.T:Goodquestion.Who’dliketoanswerhisquestion?(Nobodyanswershisquestion.)T:Perhapsitisalittledifficulttoansweritimmediately.Nowyoucanhaveadiscussionaboutthereasonforit,usingwhatyouhavelearntinphysics.(Teacherletsstudentsdiscussingroupsoffour.Afewminuteslater,teachercheckstheiranswers.)T:Whowantstoexplainthephenomenon?S6:Ithinkwaterisheavierthanoil,sovegetableoilisonthetopofthewater.T:Whohasdifferentideas?S7:Ithinkweshouldsaythatthedensityofwaterishigherthanthedensityofvegetableoil,sotheresultformed.S8:What’sthemeaningof“density”?S9:“Density”is“密度”inChinese.T:Doyouagreewiththereasonforit?Ss:Yes.Weagreewiththeidea.T:Asweknow,ifwepourmilkandwaterintooneglass,wecan’ttellwherewaterisandwheremilkis.Butjustnowwepouredoilandwaterintooneglass,itissodifferentnow.Doyouknowwhy?Ss:Becauseoilcan’tdissolveinwater,butmilkcan.T:Verygood.Let’smakeasummaryabouttheexperiment.Ifwepourvegetableoilandwaterintooneglass,theliquidwillbecometwopartsbecauseoilcan’tdissolveinwater.Sincethedensityofwaterishigherthanvegetableoil,vegetableoilwillbeontopofthewater.Isthatclear?Ss:Yes.T:Wouldyouliketowatchanotherexperiment?Ss:I’dloveto.T:OK.I’llperformthenextexperimentbymyself.Lookatme.Ihaveaglassofwater.NowI’llcoveritwithapieceofthickpaper.Attention,please.(Teacherputsonehandonthepaperandturnstheglassupsidedown.Thenteacherslowlytakeshis/herhandawayfromthepaper.)T:Whatcanyousee?Ss:Thepieceofpaperdoesn’tfallandthewaterintheglassdoesn’tflow.T:Yes.Youareright.Nowyouaregivenafewminutestohaveadiscussionaboutthereasonforit.(Teachergivesstudentsafewminutestodiscuss,andthencheckstheiranswers.)T:Whocantellusthereasonwhythepieceofpaperdoesn’tfall