必修六Unit4globalwarming学案Learningandteachingaims1.todevelopsomereadingabilities2.tolearnaboutthemaininformationofthepassage.3.todevelopthesenseofenvironmentprotection.课前预习1.化石燃料____________8副产品____________2温室效应____________9温室气体___________3甲烷，沼气___________10自然现象___________4发生____________11大量的_____________5上升，增长__________12导致_____________6同意，赞成_________13反对_____________7增长，___________14继续___________课内探究Warmingupandpre-readingScanning1.whatismainlydiscussedinthepassage?A.whathascausedtheglobalwarmingandwhetheritmatters.B.whateffectoftheglobalwarmingwillbe?C.howserioustheglobalwarmingis.D.whattheglobalwarmingis.2.whatarethetwographsabout?_______________________________________3.matchthemainideaofeachpart.Part1(para1)AHowglobalwarmingcomesabout?Part2(para2-___)BTwodifferentopinionsaboutglobalwarmingPart3(para__)CShouldwedoanything?Part4(para__)DTheearthisbecomingwarmer4.whofoundouttheamountofcarbondioxideintheatmospherefrom1957to1977?A.DrJaniceFosterB.CharleskeelingC.GeorgeHambleyD.SophieArmstrong5.whichofthefollowingisnottrueaccordingtothepassage?A.Thetemperatureinthelastcenturydidn’tseemtoincreasemuch.B.Everyonebelievesthatglobalwarmingiscausedbytheactivitiesofhuman..C.Theriseincarbondioxideiscausingasteadyincreaseinglobalwarming.D.JaniceForsterbelievesthatshecanpredictfutureglobalriseintemperature.CarefulreadingPart11.Whowrotethemagazineartice?________________________2.Whatisthenameofthemagazine?_______________________3.Whatisthemeaningoftheword“explore”inline4?______4.Thepurposeofthefirstparagraphisto_____.A.introducethewriterB.explainachangeC.introducethetopicD.raiseaquestion.Part21.Thegraphsareusedto____A.illustratepointsbyprovidingevidenceB.tellthechangeoftemperature.C.tellthecontentofcarbondioxideintheair.D.interestthereaders2.Fillintheblanksaboutthecausesofgreenhouseeffect.Greeenhouseeffectisanaturalp____________.Greenhousegasesintheatmosphereherecanwarmtheearthbytrappingheatenergy.Buttheproblembeginswhenweaddhugequantitiesofextracarbondioxidetotheatmospherebyburningfossilf______.Therefore,moreheatenergyist______intheatmosphere.Itistheincreasedamountofcarbondioxidethathasr______inglobalwarming.Part3twodifferentattitudesDr.JaniceFosterGeorgeHambleyCarbondioxidehascausedtheglobaltemperatureto__________.Anincreaseoffivedegreeswouldbea____________andcouldbe______________.Morecarbondioxideisa__________thing,whichmakescrops__________andwillen-courage____________________.Part4SummaryThereisnodoubt1._________theearthisbecomingwarmerbutthereisafiercedebateoverwhetheritishumanactivitythathascausedthisglobalwarming2.______whetheritisjustanaturalphenomenon.ManyscientistslikeDr.JaniceFosterbelievethatpeoplehavecausedtheincreaseintheearth’stemperatureby3.__________(burn)fossilfuelslikecoal，naturalgasandoiltoproduceenergywhosebyproducts4.___________(call)“greenhouse”gases，themostimportantone5._________(be)carbondioxide.Thesegasestrapheatfromthesunandthereforewarmtheearth，without6._________theearthwouldbeaboutthirty-threedegreesCelsius7.__________(cool)thanitis.Butincreasedamountofextracarbondioxidemeansthatmoreheatenergyistrappedintheatmosphere8.__________(cause)theglobaltemperaturetogoup.9__________theotherhand，scientistslikeGeorgeHambleybelievethatanywarmingwillbemildwithfewbadenvironmentalconsequencesandmoreca...
