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1、Unit4GlobalwarmingReadingTeachinggoalsTargetlanguagewordsandphrases:energy,light(v.),heat(v.),renewable,non-renewable,runout,compare,phenomenon,graph,fuel,trap,data,climate,catastrophe,consequence,range,per,glance,compareto,comeabout,fiercedebate,resultin,buildup,kee
2、ponAbilitygoalsEnablethestudentstotalkaboutdifferentsourcesofenergy.Enablethestudentstoreadthetext,understandwhatitisaboutandtalkaboutthecausesandeffectsofglobalwarming.Teachingimportant&difficultpointsEnablethestudentstogetabetterunderstandingofarticlesofthiskind.Te
3、achingaidsAprojectorandablackboardTeachingproceduresStep1WarmingupT：Nowlet’slookatapictureontheslideandanswerthequestionbelow.Whatisthegreenhousemadeandusedfor?Agreenhouseismadeofglassandisusedforgrowingplants,especiallyduringcoldweather.What’sgreenhouseeffect?Step2S
4、canningReadthetextquicklyandfindtheanswertothequestions:1.Whowrotethemagazinearticle?Whatisthenameofthemagazine?SophieArmstrong,EarthCare.2.Whatarethenamesofthethreescientistsmentionedinthearticle?DrJaniceFoster,CharlesKeeling,GeorgeHambley.3.Whatdotheythinkaboutglob
5、alwarming?Dotheyagreewithoneanother?Theydon'tagreewitheachother.Dr.JaniceFosterthinkstheeffectsofglobalwarmingcouldbeveryserious.GeorgeHambleythinksglobalwarmingwillbemildwithfewbadenvironmentalconsequences.CharlesKeelingbelievesitistheburningofmoreandmorefossilfuels
6、thatisresultinginabigincreaseincarbondioxide.ThefirstgraphshowsthetemperatureincreaseofonedegreeFahrenheitbetween1860to2000.Thesecondgraphshowsthecarbondioxidecontentintheatmospherefrom1957to1977.4.Whatarethetwographsabout?Thefirstgraphshowsthetemperatureincreaseofon
7、edegreeFahrenheitbetween1860to2000.Thesecondgraphshowsthecarbondioxidecontentintheatmospherefrom1957to1977.5.Whatisthemaintopicofthearticle?Globalwarming/thewarmingoftheearth.Step3SkimmingReadthepassagecarefullyandjudgewhetherthestatementsaretrueorfalse.1.Thetemperat
8、urelastcenturydidn’tincreasemuch.2.Everyonebelievesthatglobalwarmingiscausedbytheactivitiesofhumans.3.JaniceFosterbelievesthatgloba
