Unit 3 Environmental Protection Reading and Thinking 教案-高中英語人教版選擇性必修第三冊

2019新人教高中英語選擇性必修三Unit3EnvironmentalProtectionReadingandThinking公開課教案Teachingaims:1.Enablestudentstoknowaboutclimatechangeandsummarisethemainideaofeachparagraph.2.Guidestudentstolearnaboutthe“greenhouseeffect”andcreateadiagramdescribinghowitworks.3.Helpstudentstoanalysetheconsequencesofclimatechangeandenhancetheawarenessofenvironmentalprotection.4.Voiceyourpersonalopinionsabouthowtodealwithclimatechange.Teachingkeypoints:Figureoutthemainideaofthetextandthetopicofeachparagraph.Analysetheconsequencesofclimatechangeandenhancetheawarenessofenvironmentalprotection.Teachingdifficultpoints:Learnaboutthe“greenhouseeffect”andcreateadiagramdescribinghowitworks.Voicetheirpersonalopinionsabouthowtodealwithclimatechange.Teachingprocedures:StepⅠDiscusstheOpeningPageViewtheOpeningPageofthisunitandanswerthequestionsbelow.1.Wheredoyouthinkthisphotowastaken?2.Whatdoesthisphotomakeyouthinkof?Suggestedanswers:1.IthinkthisphotowastakenineithertheArcticorAntarctica,asthoseplaceshavelargeicesheetslikethis.2.Thisphotomakesmethinkoftheearthisbecomingwarmer—globalwarming,whichcausesgreatdamage.StepⅡPre-readingPredictwhataspectsaboutclimatechangewillbetalkedaboutinthetext.Beforeyourreading,listdetailsinthefirsttwocolumns.Fillinthelastcolumnafterreading.Climatechange—globalwarmingWhatIKnow(K)WhatIWanttoKnow(W)WhatIHaveLearnt(L)Lookatthetitle“ClimateChangeRequirestheWorld’sAttention”,thegraphsandthepicturesPage26,answerthefollowingquestions.1.Wherewouldyoumostlikelyfindthistext?2.Whatisthegraphabout?Whatinformationcanyougetfromit?3.Guesswhatmighthappentothepolarbearinthephoto?Howdiditdie?4.Whatdoyouthinkwillbetalkedaboutinthetext?Suggestedanswers:Climatechange—globalwarmingWhatIKnow(K)WhatIWanttoKnow(W)WhatIHaveLearnt(L)globalwarming;carbondioxide;sealevelrises;Polaranimalsarelosinghome;waterresourceshortage;coastalcitiescouldbeflooded...Iwanttoknowhowthegreenhouseeffectworks,andmoremeasuresweshouldtaketopreventglobalwarming.“natural”greenhouseeffect;“man-made”greenhouseeffect;makepolicies;reduce“carbonfootprint”1.Inasciencemagazine.2.Thegraphisabouttheglobalsurfacetemperatureduring1920-2016baseperiod.Thetemperatureoftheglobalsurfaceroseabout1.2℃from1920to2016.TheEarthisbecomingwarmerandwarmer.3.Thepolarbearlyingonthegroundisdead.Itis“skinandbones”.Maybeithasstarvedtodeathbecauseoffoodshortagecausedbyclimatechange.4.Thetextwilltalkaboutthereasonsandimpactsofglobalclimatechange,andwhatwehumansshoulddo.StepⅢWhile-readingActivity1ReadingforthemainideaandthestructureSkimthetextandmatchthemainideaofeachparagraph.Paragraph1A.Thereasonscausingtheincreaseintemperature.Paragraph2 B.Introducethepresentsituationaboutclimatechange.Paragraph3 C.ArealcaseshowedthegreatimpacttheincreaseintemperaturehadonEarth’secology.Paragraph4 D.Whatshouldwehumandoaboutglobalwarming.Paragraph5 E.Theseriousconsequencesofglobalwarming.Suggestedanswers:Paragraph1:BParagraph2:CParagraph3:AParagraph4:EParagraph5:DActivity2ReadingfordetailsSupposeyouwereLiMing.YouareinvitedtoattendtheWorldEconomicandEnvironmentalConferences.Andyouwillbeinterviewedbyajournalist.Pleaseanswerhisquestionswithwhatyoulearnfromthistext.ReadParagraph1&Paragraph2carefullyandanswerthequestions.1.WhathappenedtotheEarth?Canyoulistsomeevidenceofit?2.Whathappenedtothepolarbearinthephoto?Howdiditdie?Whydidthewriterwriteaboutit?Suggestedanswers:1.Theglobalclimatehaschanged.TheEarthisgettingwarmerandwarmer.Awarmingoceanandatmospherealongwithmeltingiceandrisingsealevelsprovideevidenceofadramaticchangeintheglobalclimate.2.Thepolarbearinthephotodiedofstarvation.Lowsea-icelevelscausedbyclimatechangemadethebearcouldn’thuntsealsasbefore.Ithadtotravelgreaterdistancesinordertofindfood.Thewriterwroteaboutitbecauseitshowedoneoftheeffectsofrisingtemperaturesduetoclimatechange.Theseriousnessofglobalwarmingisbetterillustratedbyarealcase.Activity3ReadParagraph3carefullyandcreateadiagramdescribinghowthegreenhouseeffectworks.1.Whatcausedtheincreaseintheglobalaveragesurfacetemperature?2.Createadiagramdescribinghowthegreenhouseeffectworks.3.Whataretheconsequencesofhighgreenhousegasemissions?Suggestedanswers:1.Itisthe“greenhouseeffect”,includingthe“natural”andthe“man-made”greenhouseeffect.2.Thediagramdescribinghowthegreenhouseeffectworks.3.Highgreenhousegasemissionsleadtomoreheatenergybeingtrappedintheatmosphereandrisingtemperature.Activity4ReadParagraph4carefullyandfinishthemindmap.Whataretheresultsoftheriseintemperature?Suggestedanswers:Activity5WhatweshoulddoaboutglobalwarmingGovernments:1.

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_________________________Individuals:1.

_________________________2.___________________________Suggestedanswers:Governments:Makepolicies;Takeappropriateactionsandmeasurestoreducegreenhousegasemissions.Individuals:Reduceour“carbonfootprint”byrestrictingtheamountofcarbondioxideourlifestylesproduce.Seizeeveryopportunitytoeducateeveryoneaboutglobalwarming.StepⅣPost-reading—CriticalandCreativeThinkingDiscussthesequestionsingroups.1.Whodoyouthinkshouldtakeresponsibilityfordealingwithclimatechange?(individuals,largebusinesscompaniesorgovernments)2.“Weindividualscanalsoreduceour‘carbonfootprint’byrestrictingtheamountofcarbondioxideourlifestylesproduce”.Whatcanwedotolivealow-carbonlifestyle?Suggestedanswers:1.Forexample:Everyindividualcanmakeabigdifference.Ifirmlybelievethateachindividualcitizencannotsitbackandsayitissomeoneelse’sresponsibilitytoprotectenvironment.Wemustplayourrolesinthesociety.2.Theanswersvary.StepⅤHomework1.FinishwhatyouhavelearnedinthelastcolumnofKWLchart.2.EarthDayisonApril22ndeveryyear.Inordertoraisepublicawarenessofexistingenvironmentalproblemsandmobilizepeopletoparticipateintheenvironmentalmovement,thecitywillholdaspeechcontestthisweekendwiththethemeof“Greenlife,saveourhome”.Asarepresentativeofyourschool,youwilltakepartinthecontest.Pleaseprepareyourspeech.Suggestedanswers:1.Ihavelearntmanyusefulwordsandexpressionstodiscussclimatechange.Learnaboutwhatthe“natural”greenhouseeffectandthe“man-made”greenhouseeffectare.Whatcanwedotodealwithglobalwarming.2.Ladiesandgentlemen,Iamhonouredtostandheretosharewithyouonsuchanimportantsubjectasclimatechange.Yes,itisglobalwarming.Letmegiveyoutwophenomena.Hereisthefirstone.Moreandmorepeopleareusedtousingairconditioningbuthowmanypeoplehaveeverthoughtwhetherthisnewhobbywillbringside-effectsornot?Maybejustfewpeople.Infact,theside-effectisapparent.Thegasesexhaustedfromairconditioningcontainalotofmethanewhichcouldcauseglobalwarming.Bytheway,airconditioningwillwastealotofelectricity.Thesecondoneisabouttheincreasingnumberofcars.Accordingtothestatistics,inthe21stcentury,thereare7millionscarsintheworld,alargenumberofexhaustgaseshasseriouslyinfluencedus,suchas:cough,throatinflammation.Thesetwophenomenaarejustafewpartsofreasonswhichchangeourenvironmentbadly.Therearemanyotherreasons.Inthenearly100years,theglobalaveragetemperatureexperiencedfluctuationstwice.Generally,iti