选修六Unit4 Globalwarming]

Unit4GlobalWarmingTheeffectsofglobalwarming•Negativeeffects:1causethesealeveltorise;2severestorms;3droughts;4famine;5destructionofspecies6floodTheeffectsofglobalwarming•Positiveeffects:1makeplantsgrowfaster;2cropswillproducemore;3makelifebetter•Energysources?•Internationalrelations?•Money?•Technology?Whichisthemostimportanttoacountry?•…•Manpower?energysourcesWedependonenergytodomanythingsinourdailylives.Forexample,energylightsourcitiesandheatsourbuildings.Makealistofthingsthatuseenergyinyourhome,inyourschool,oranyotherplacesyoucanthinkof.stovelightthingsthatuseenergyinyourhomemicro-waveovencassetteplayerheatingtelevisionhairdryervideoplayerfridgecomputerwashingmachinestoveWindenergyisusedaspowertoproduceelectricity.Windmillswhereelectricityisproducedbyburningcoals.Thecoalpowerstationsinwhichoilisrefinedandmadepure.TheOilRefineriesafacilitydesignedtoconvertnuclearenergyintoelectricity.Anuclearpowerplantontheroofofahouseonabrightsunnydayareusedtocollectsolarenergy,makingyourhousewarmorheatingyourwater.Solarpanelsareusedtokeepbackwaterandraiseitslevelforirrigationorforproducingelectricity,etc.TheHydro-electricdamsAnenergysourceis“renewable”whensuppliesofitneverrunoutand“non-renewable”whenonedaytheywillrunout.Whichenergysourcesonyourlistarerenewableandwhicharenon-renewable?DiscussionCoalOilNaturalgasUranium[化]铀(nuclearenergy)FossilfuelsNon-renewableWind(windpower)Sun(solarenergy)Water(hydro-electricpower)Plantwaste植物性废物(biomassenergy生物团能量)Hotspringsorgeysers间歇泉(geothermalenergy)Thesea(tidalenergy潮汐能)RenewableWhatarefossilfuels?•FossilfuelsareAncientanimalandplantmaterialbelowthesurfaceoftheearthwithahighcarboncontent,suchascoal,oilandnaturalgas,whichcanbeburnttoproduceenergy.Theyarealsoknownasnon-renewableenergybecauseoncetheyarerunoutof/runout,theycannotberenewed.Whatarethesebuildingsmadeofandwhatistheirpurpose?Theyaremadeofglassandplantscangrowinitwhenitiscoldoutside.Howdoesitwork?Theglasstrapstheheatfromthesun,makingtheairwarmsothatplantscangrowbetter.Greenhousegases!What’sgreenhousegaseseffect?Greenhousegasesperformthesamefunctionastheglassinagreenhouse---Theytraptheheatofthesunandkeeptheairsurroundingtheearthwarm.Itiscalledthegreenhouseeffect.TheEarthIsBecomingWarmer–ButDoesItMatter?TranslatethefollowingwordsintoEnglish:•图表•现象•燃料•影响•灾难•副产品•数据•气候•每•陈述•范围•干旱graphphenomenonfuelperdatacatastropheclimateconsequencestaterangebyproductdrought•与…比较•发生•大量的•导致•增加•毫无疑问•继续•物种的灭绝comparetocomeabouthugequantitiesofresultinbuildupThereisnodoubtthat…keeponthedestructionofspeciesTranslatethefollowingwordsintoEnglish:FastReadingScanning1.Whowrotethemagazinearticle?Whatisthenameofthemagazine?2.Whatarethenamesofthethreescientistsmentionedinthearticle?3.Whatarethetwographsabout?SophieArmstrongwrotethemagazinearticle.Thenameofthemagazineis“Earthcare”.2.Whatarethenamesofthethreescientistsmentionedinthearticle?TheyareDr.JaniceFoster,CharlesKeelingandGeorgeHambley.1.Whowrotethemagazinearticle?Whatisthenameofthemagazine?3.Whatarethetwographsabout?Graph1showsthetemperatureincreaseofonedegreeFahrenheitbetween1860to2000.Graph2showsthecarbondioxidecontentintheatmospherefrom1957to1997.Graph1:Graph2:Whatisthemaintopicofthearticle?A.Theearth.B.Globalwarming.C.Becomingwarmerdoesn’tmatter.Detailed-ReadingReadthearticleindetailsandfinishthefollowingtask.1.Thetemperaturelastcenturydidn’tincreasemuch.2.Everyonebelievesthatglobalwarmingiscausedbytheactivitiesofhumans.3.JaniceFosterbelievesthatshecanmeasurethefutureglobalriseintemperature.4.Naturalgasisagreenhousegas.5.Carbondioxideisabyproductofburningfossilfuels.Telltrueorfalse.TTFTT1.matter要紧、有关系，=beimportantItdoesn’tmatterifImissthetrainbecausethere’sanotheroneintenminutes.Itiswhatyoudoratherthanwhatyousaythatmatters.Languagepoints2.Itisarapidincreasewhencomparedtoothernaturalchanges.comparevt.1)比较;对照compare…with…表示“把…与…相比(同类相比)”如：Comparedto/withmanywomen,shewasindeedveryfortunate.2)喻为;比拟compare…to…表示“把…比做…(异类相比,比喻)”如：Myhandwritingcannotbecomparedwithmyfather’s.我的书法不能与我父亲的相比。Shakespearecomparedtheworldtoastage.莎士比亚把人世比做舞台。用法拓展(1)comparenotes交换意见(2)beyondcomparison/compare无与伦比(3)compare...to...把……比作……(4)compare...with...把……和……相比Comparedwithyourbrother,youshouldmakegreatereffortstostudyEnglish.和你哥哥相比，你应该更加努力学习英语。comeabout:发生,造成,相当于happen你能告诉我事情是怎么发生的吗？Canyoutellmehowtheaccidentcameabout?随着电的使用,种种大变化发生了。Withtheuseofelectricity,greatchangeshavecomeabout.comeout出现;出版comeup出现;被提出3.Sohowhasthiscomeaboutanddoesitmatter?comeaboutcomeacrosscomeroundcomeintobeingcomeintoeffectcomeoutcomedowntoearth发生偶然遇到绕道而来,苏醒出现,形成开始生效出现;出版;显出回到现实中来comeabout是不及物短语。Pleasetellmehowtheaccident___.Iamstillinthedark.(2005江西)A.camebyB.cameoutC.cametoD.cameaboutD4.Thereisnodoubtthat….doubt1)作不可数名词,作“疑惑;怀疑”①肯定句中doubt多接whether(一般不用if代替)同位语从句。②否定句中doubt多接that同位语从句。如:There'ssomedoubt________he'llkeephispromise.Shehadherdoubt________thenewbookwouldsellwell.whetherwhetherThereisnodoubt______theywillaskyouforhelp.Ihavenodoubt______youwillsucceed.2)作及物动词常用于下列句型中,作“怀疑;不能肯定;不大相信”解,一般不用进行时态。thatthat①用于否定句或疑问句,后接that引导的宾语从句。②用于肯定句,一般接whe