2023学年完整公开课版选修6unit4公开课

Welcometomyclass!Warmingup&ReadingTeachingaims:1Tolearnsomekeywordsandexpressions.2Learnsth.aboutenvironmentalproblems,suchassomenaturaldisasters3learnsth.aboutglobalwarming.Teachingdifficulties:1Helpthesstolearnhowglobalwarmingcomesabout2DiferentattitudestoglobalwarmingTeachingkeypoints:1keywordsandexpressions2Getthemainideaofthepassage.NewWordsandexpressionstemperature温度onedegreeFahrenheit华氏一度explore探索humanactivities人类活动phenomenon现象subscribeto同意，赞成fossilfuels矿物燃料byproduct副产品“greenhouse”gases温室气体atmosphere大气methane甲烷，沼气degreeCelsius摄氏度quantitiesof大量的accuratemeasurements精确的测量data资料，数据catastrophe大灾难beopposedto反对environmentalconsequences环境影响agreatrangeof大量的evenif即使keepon继续AnuclearpowerplantAnoilrefinerywindmillsAcoalpowerstationSolarpanelsAhydroelectricdamRenewableenergyNon-renewableenergyWindmillsAnuclearpowerplantSolarpanelsAhydroelectricdamAcoalpowerstation

AnoilrefineryHaveyoueverseenagreenhouse?Pre-readingWhatisthebuildingmadeofandwhatisitusedfor?

Itismadeofglassandisusedforgrowingplants,especiallyduringcoldweatherPre-readingTheairinsideiswarmbecausetheglasstrap(挡住；吸收)theheatfromthesunandkeepsitfromescaping.Thismakesthegreenhouseheatupandsotheplantscangrowthroughoutthecoldperiod.Itismadeofglassandisusedforgrowingplants,especiallyduringcoldweather.Intheatmosphere(大气层)surroundingtheearththerearegasescalled“greenhousegases”.Itappearsintheprocess(过程)ofproducingenergy.Themostimportantoneofgreenhousegasesiscarbondioxide.GlobalwarmingTheproblembeginswhenweaddhugequantitiesofextracarbondioxideintotheatmosphere.Theglobaltemperatureistogoup.Thatistosay,ourearthisbecomingwarmer.Unit4GlobalWarmingReadingTheEarthisBecomingWarmer--ButDoesItMatter?地球在变暖——要不要紧？SkimmingSkimthetitle:

THEEARTHISBECOMINGWARMER–BUTDOESITMATTER?Whatisthemaintopic?Theearth. B.Globalwarming.

C.Becomingwarmerdoesn’tmatter.

Thestructureofthearticle:IntroductionAtitleBodyConclusionSkimthebodypart(7paras):Para.1Para.2-3IIIPara.4-6IIIPara.7IVIntroductionBodyConclusionMatchthemainideaofeachpart:Explainhowglobalwarmingcomesabout.Twodifferentattitudesamongscientiststowardstheconsequencesofglobalwarming.Introducetheproblemofglobalwarming.Giveawarningandraiseaquestionforthereaderstothinkover.I(1)II(2-3)III(4-6)IV(7)Whowrotethearticle?Whatisthenameofthemagazine?Carefulreading:thefirstparagraph:SophieArmstrongEarthCarePartII(Para2-3)TrueorfalseEveryonebelievesthatglobalwarmingiscausedbytheactivitiesofhumans.JaniceFosterbelievesthatshecanmeasurethefutureglobalriseintemperature.GreenhouseGasesaretotallybad.FTF1.Greenhouseeffectisanaturalp_______.______amountsofGreenhousegasesintheatmosphere.Buttheproblembeginswhenweaddhugeq

ofextracarbondioxidetotheatmosphere.Therefore,moreheatenergyist

intheatmospherecausingtheglobaltemperatureto_________.

FillintheblanksaboutthecausesofGreenhouseeffect.henomenon

uantities

rappedgoupSmallPara4.thelevelsofcarbondioxidehaveincreasedgreatlyoverthelast100to150yearsWhomadeaccuratemeasurementsoftheamountofcarbondioxide?2.Howmuchhasincreased?CharlesKeelingThecarbondioxideintheatmospherewentupfromaround315partstoaround370partspermillion.Para5.Howhighwillthetemperaturego?Theamountofwarmingcouldbeaslowas1to1.5degreesCelsius,butitcouldbeashighas5degrees.WhatdoDr.JaniceFosterandthescientistGeorgeHambley

thinkabouttheconsequencesofglobalwarming?

Dotheyagreewithoneanother?Para6

Theydon'tagreewitheachother.

Dr.JaniceFosterthinksitisserious.GeorgeHambley

thinksglobalwarmingwillbemildwithfewbadenvironmentalconsequences.Doesglobalwarmingmatter?Positiveeffects

Negativeeffects

causethesealeveltoriseseverestormsfloodsdroughtsfaminesthespreadofdiseasesdisappearanceofspeciesPositiveeffectsNegativeeffectscausethesealeveltoriseseverestormsfloodsdroughtsfaminesthespreadofdiseasesdisappearanceofspeciesPositiveeffectsNegativeeffectsmakeplantsgrowquickercropswillproducemoreagreaterrangeofanimalsmakelifebetterDisscussion:

Howtoreducegreenhousegases?Haveadisscussionwithyourclassmates.Theearthisbecomingwarmer,doesitmatter?可能用到的句型：Itis+adj.(fo