高二英语选修6第4单元学案

高二英语选修（6）unit4学案审核高二英语备课组主备人杨少英第1页共13页Unit4GlobalwarmingPeriod1WarmingUp，Pre－reading，ReadingLearningaims：1.Getstudentstoknowaboutglobalwarminganditseffect；2.Toenablethestudentstorealizewhatwecandoaboutglobalwarming.LearningimportantpointsToenablethestudentstolearnaboutglobalwarmingandtodeveloptheirreadingability.LearningdifficultpointToenablethestudentstotalkaboutwhatweshoulddotopreventglobalwarming.Beforeclass（课前自主学习）I.重点单词1._________v.消费；消耗；耗尽2._________v.趋向；易于；照顾3_________n.大灾难；浩劫4._________adj.胡乱的；任意的5._________v.反对；反抗；与(某人)较量6_________.n.洪水；水灾7._________v.同意；捐赠；订阅8._________n.燃料II.重点短语1.comeabout_________2.keepon_________3.subscribeto_________4.beopposedto_________5._________大量的6.________即使_7._________上升；增长；升起8_________依靠，依赖9_________温室效应10._________用光，耗尽Inclass（课上合作探究）LearningproceduresStep1Warmingup1．Warmingupbyreadingandtalking：Readthroughtheexercise.Putstudentsingroupstotalkaboutwhatweuseenergyfor，discusswhatarethesourcesoftheseenergyandwhetherthefollowingsourcesarerenewableornon－renewable.________________________________________________________________ThingsthatuseenergySourcesofenergyRenewable/non－renewablelightsheatingtelevisioncassetteplayervideorecordercomputerfridgestovehairdryer...coaloilnaturalgaswindpowersolarenergynuclearenergyhydro－electricpowerbiomassenergygeothermalenergytidalenergy高二英语选修（6）unit4学案审核高二英语备课组主备人杨少英第2页共13页Step2Pre－reading1．Lookatthepictureofagreenhouseandaskstudentswhatagreenhouseismadeofandwhatitspurposeis.2．Askstudentswhattheythink“greenhousegases”areandwhattheythinkgreenhousegasesdo.Lookatthepictureaboveandexplainittotheirpartners.Step3ReadingandcomprehendingTask1．SkimmingAskstudentstoreadthepassagequicklysoastogetthekeywordsandgeneralideaofeachparagraphandanswerthefollowingquestions：(1)Whatisthemaintopicofthearticle?________________________________________________________________________(2)Whowrotethemagazinearticle？Whatisthenameofthemagazine?________________________________________________________________________(3)Whatarethenamesofthethreescientistsmentionedinthearticle？Dotheyagreewithoneanother?________________________________________________________________________(4).Whatdotheythinkaboutglobalwarming?Dotheyagreewithoneanother?________________________________________________________________________(5).Whatarethetwographsabout?________________________________________________________________________Task2.ScanningChoosethebestanswerstoeachquestionaccordingtothetext(1).Howmuchdidthetemperatureriseinthe1900s?A.OnedegreeFahrenheit.B.OneCelsiusC.TwodegreesD.ThirtydegreeCelsius(2).Whatcausesthetemperatureoftheearthtoincrease?A.CuttingtreesB.WastingthefarmlandC.RunningoutoftheriverwaterD.Burningfossilfuels(3).Whoaccuratelymeasuredtheamountofcarbondioxideintheatmospherefrom1957to1997?A.Dr.JaniceFoster.B.Fahrenheit.C.CharlesKeelingD.GeorgeHambley(4).GeorgeHambleybelievesthatmorecarbondioxideisactually_____.A.abadthingB.adangerousthing.C.acomparativethingD.apositivething(5).Whatisthemainideaofthispassage?A.Globalwarming.B.Floodphenomenon.C.Makingmethane.D.MakinggreenhousesTask3．CarefulreadingReadthepassagecarefullyandjudgewhetherthestatementsaretrue(T)orfalse(F)．①JaniceFosterbelievesthatglobalwarmingiscausedbytheburningfossilfuels.()②Naturalgasisagreenhousegas.()③Carbondioxideisabyproductofburningfossilfuels.()④PeopleacceptCharlesKeeling'sdatabecausehetookaccuratemeasurements.()⑤Floodingcouldbeoneoftheeffectsoffutureglobalwarming.()⑥GeorgeHambleybelievesscientistsarejustguessingabouttheeffectsofglobalwarming.()⑦GeorgeHambleyisworriedabouttheeffectsofcarbondioxideonplantgrowth.()⑧Itisclearwhattheeffectsofglobalwarmingwillbe.()Task4．Structureanalyzing高二英语选修（6）unit4学案审核高二英语备课组主备人杨少英第3页共13页Askstudentstoreadthetextcarefullyandtrytofindouthowmanypartstheycandividethetextintoandfindoutthemainideaofeachpart.PartMainideaPart1(Paragraph__)AIt'suptoreaderstothinkanddecidewhetherpeopleshoulddosomethingaboutglobalwarmingornot.Part2(Paragraphs__to__)BToillustratehowglobalwarmingcomesabout.Part3(Paragraph__)CTointroduceadebateovertheissueofglobalwarming.Part4(Paragraph__)DTolisttwodifferentattitudesamongscientiststowardstheglobalwarmingStep4随堂达标检测Theearthisbecomingwarmeranditishumanactivity_______1hascausedthisglobalwarming.Allscientists_________2totheviewthattheincreaseintheearth’stemperatureis_________3totheburningoffossilfuels.Somebyproductsofthisprocess,especiallycarbondioxide,arecalled‘greenhouse’gases.Somesmallamountsofgasesintheatmosphere_________4heatfromthesunandthereforewarmtheearth.Soweneedthosegases.However,theproblembeginswhenweaddhuge_________5ofextracarbondioxideintotheatmosphere.Itcausedtheglobaltemperatureto__________6up.Ascientist__________7CharlesKeelingmadeaccuratemeasurementsoftheamountofcarbondioxideintheatmosphere.Buthowhighwillthetemperature_________8go?_________9ifwestartreducingtheamountofcarbondioxideandothergreenhousegases,theclimateisgoingto_______10onwarmingfordecadesorcenturies.Nowoneknowstheeffectsofglobalwarming.Period2LanguagepointsBeforeclass（课前自主学习）I.重点单词