高中英语Unit4《GlobalWarming》学案5新人教版选修6.docx

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1、Unit4GlobalWarmingGrammarLearningmaterialNSEFCBook6——Unit4LearningaimsEnablethestudentstomastertheusageoftheformitis/was...that.....LearningimportantpointsHowtoenablethestudentstoknowthestructureandtheusageoftheformitis/was...that....LearningdifficultpointsHowtohel

2、pthestudentstomastertheusageoftheformitis/was...that....Learningaidstaperecorder,slidesLearningproceduresStep1RevisionT:Firstlet’scheckanswers.(slideshow)Discoveringusefulwordsandexpressions.(P28)1.CharlesKeelingcollected______onthecarbondioxidecontentintheatmosphe

3、reoveraforty-yearperiod.Hefoundthattheamountofcarbondioxide_______increasingduringthattime.2.Althoughweareburningcoalinhuge_________everyyear,wewon't________ofitforcenturies.3.Iftheamountofgreenhousegasescontinuesto_______wecouldbefacingaglobal__________.4.Manyscie

4、ntistsbelievethatglobalwarminghas__________throughtheburningoffossilfuels.Theydonotthinkthatignoringtheissueisworththe____.5.______describesweatherconditionsoveraperiodofyearsinaparticularplace.6.The_____________ofarisingsealevelwouldbewidespreadflooding.7.Theuseof

5、energyinSusanna'scountryislow______________theuseofenergyintheUSA.8.Thewarmingoftheearthisa_____________thatcausesgreatconcern.9.The________showstemperaturechangesduringthe20thcentury.10.Onehectareofforestcanabsorb23tonsofcarbondioxide____year.Keys：1.datakepton2.qu

6、antities;runout3.buildup;catastrophe4.comeabout;risk5.Climate6.consequence7.comparedto8.phenomenon9.graph10.perAnswerkeysforEx.2onPage28:Thefirstgraphshowstheglobal_______________between________and_________Thetemperature__________anddecreasedoverthisperiodbutonthew

7、holeit_用心爱心专心1________byaround_________anditshighestin2000.Therewasasteady_________________inthetemperatureduringthetwentyyearsafter1980.Wecanseefromthegraphthattheearthhasbecome___________sinceearlylastcentury.Thesecondgraphshowstheamountof______________intheatmos

8、pherefrom________to_______.Thecarbondioxide__________steadilyoverthisforty-yearperiod.Itwentupfrom315to370parts___________million.Keys：Temperatur