高中英语 Unit 4 Global warming Part II学案新人教版选修6.doc

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1、Unit4GlobalWarmingPartII:Reading一、【学习目标】1.掌握文中重点词汇和重难点句。2.了解全球变暖和气候的关系，树立环保意识。二、【自主预习】Step1:Pre-readingAskthestudentstolookatthepictureinPre-readingandanswerthefollowingquestions:1.Whatdoyouseeinthepicture?2.Whatisitusedfor?3.Whataregreenhousegases?Whateffectsdoyouthinkgreenhouseg

2、aseshaveontheearth?Step2:SkimmingDividethepassageinto4partsandmatchtheparagraphsandthemainideas.Part1para___topara____DifferentattitudesamongscientiststowardsglobalwarmingPart2para___topara___It’suptoreaderstothinkanddecidewhetherpeopleshoulddosomethingaboutglobalwarming.Part3para

3、___topara____HowglobalwarmingcomesaboutPart4para___topara____AgeneralintroductiontoglobalwarmingB.Thepassagemainlyintroducesthe_____________ofglobalwarmingandscientists’different__________towardsit.C.Whereisthispassagetakenfrom?A.atravelguideB.amagazineabouttheenvironmentC.anewspa

4、peraboutpoliticsD.achildren’sbookD.Thewriterofthepassageis__________Step3:CarefulreadingA:Readpart1andanswerthefollowingquestions:1.Whatisthepurposeofthefirstparagraph?______________________________________2.Whatisthegraphfor?______________________________________B:Readpart2andans

5、werthefollowingquestions:Whatisthecommonlyacceptedreasonfortheincreaseintheearth’stemperature?Whatis“greenhouseeffect”?Decidewhetherthesentencesaretrueornot.①Everyonebelievesthatglobalwarmingiscausedbytheactivitiesofhumans.()②JaniceFosterbelievesthatshecanmeasurethefutureglobalinc

6、reaseintemperature.()③Theamountofcarbondioxideintheatmospherefrom1957to1997wasmeasuredaccurately.()④Greenhousegasesareharmfultohumanbeingsandweshouldtryourbesttoridtheworldofthem.()C:Readpart3andanswerthefollowingquestions:1.Whatarethedifferentattitudestowardsglobalwarming?2.Accor

7、dingtosomescientistslikeGeorgeHambley,__________A.globalwarningisadisasterB.therewillbethedisappearanceofspeciesasaresultofhighlevelsofglobalwarming.C.Morecarbondioxidewilldoalotofgood.DHeisworriedabouthighlevelsofcarbondioxideStep4.Post-reading1.Whataresomeofthewritingtechniquesa

8、reusedinthepassage?①givingexample