2023學(xué)年完整公開(kāi)課版選修6unit4公開(kāi)課

Welcometomyclass!Warmingup&ReadingTeachingaims:1Tolearnsomekeywordsandexpressions.2Learnsth.aboutenvironmentalproblems,suchassomenaturaldisasters3learnsth.aboutglobalwarming.Teachingdifficulties:1Helpthesstolearnhowglobalwarmingcomesabout2DiferentattitudestoglobalwarmingTeachingkeypoints:1keywordsandexpressions2Getthemainideaofthepassage.NewWordsandexpressionstemperature溫度onedegreeFahrenheit華氏一度explore探索humanactivities人類(lèi)活動(dòng)phenomenon現(xiàn)象subscribeto同意，贊成fossilfuels礦物燃料byproduct副產(chǎn)品“greenhouse”gases溫室氣體atmosphere大氣methane甲烷，沼氣degreeCelsius攝氏度quantitiesof大量的accuratemeasurements精確的測(cè)量data資料，數(shù)據(jù)catastrophe大災(zāi)難beopposedto反對(duì)environmentalconsequences環(huán)境影響agreatrangeof大量的evenif即使keepon繼續(xù)AnuclearpowerplantAnoilrefinerywindmillsAcoalpowerstationSolarpanelsAhydroelectricdamRenewableenergyNon-renewableenergyWindmillsAnuclearpowerplantSolarpanelsAhydroelectricdamAcoalpowerstation

AnoilrefineryHaveyoueverseenagreenhouse?Pre-readingWhatisthebuildingmadeofandwhatisitusedfor?

Itismadeofglassandisusedforgrowingplants,especiallyduringcoldweatherPre-readingTheairinsideiswarmbecausetheglasstrap(擋??；吸收)theheatfromthesunandkeepsitfromescaping.Thismakesthegreenhouseheatupandsotheplantscangrowthroughoutthecoldperiod.Itismadeofglassandisusedforgrowingplants,especiallyduringcoldweather.Intheatmosphere(大氣層)surroundingtheearththerearegasescalled“greenhousegases”.Itappearsintheprocess(過(guò)程)ofproducingenergy.Themostimportantoneofgreenhousegasesiscarbondioxide.GlobalwarmingTheproblembeginswhenweaddhugequantitiesofextracarbondioxideintotheatmosphere.Theglobaltemperatureistogoup.Thatistosay,ourearthisbecomingwarmer.Unit4GlobalWarmingReadingTheEarthisBecomingWarmer--ButDoesItMatter?地球在變暖——要不要緊？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