《英语温室效应》PPT课件.ppt

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1、Unit4GlobalwarmingWhatisthegreenhousemadeandusedfor?Agreenhouseismadeofglassandisusedforgrowingplants,especiallyduringcoldweather.Scanning1.Whowrotethemagazinearticle?Whatisthenameofthemagazine?SophieArmstrong,EarthCare.2.Whatarethenamesofthethreescientistsmentionedinthearticle?

2、DrJaniceFoster,CharlesKeeling,GeorgeHambley.3.Whatdotheythinkaboutglobalwarming?Dotheyagreewithoneanother?Theydon'tagreewitheachother.Dr.JaniceFosterthinkstheeffectsofglobalwarmingcouldbeveryserious.GeorgeHambleythinksglobalwarmingwillbemildwithfewbadenvironmentalconsequences.Ch

3、arlesKeelingbelievesitistheburningofmoreandmorefossilfuelsthatisresultinginabigincreaseincarbondioxide.ThefirstgraphshowsthetemperatureincreaseofonedegreeFahrenheitbetween1860to2000.Thesecondgraphshowsthecarbondioxidecontentintheatmospherefrom1957to1977.4.Whatarethetwographsabou

4、t?ThefirstgraphshowsthetemperatureincreaseofonedegreeFahrenheitbetween1860to2000.Thesecondgraphshowsthecarbondioxidecontentintheatmospherefrom1957to1977.5.Whatisthemaintopicofthearticle?Globalwarming/thewarmingoftheearth.SkimmingReadthepassagecarefullyandjudgewhetherthestatement

5、saretrueorfalse.1.Thetemperaturelastcenturydidn’tincreasemuch.2.Everyonebelievesthatglobalwarmingiscausedbytheactivitiesofhumans.3.JaniceFosterbelievesthatglobalwarmingiscausedbtheburningfossilfuels.4.Naturalgasisagreenhousegas.5.Carbondioxideisabyproductofburningfossilfuels.6.P

6、eopleacceptCharlesKeeling’sdatabecausehetookaccuratemeasurements.7.Floodingcouldbeoneoftheeffectsoffutureglobalwarming.8.GeorgeHambleybelievesscientistsarejustguessingabouttheeffectsofglobalwarming.9.GeorgeHambleyisworriedabouttheeffectsofcarbondioxideonplantgrowth.10.Itisclearw

7、hattheeffectsofglobalwarmingwillbe.Keys:True:3,5,6,7,and8False:1,2,4,9,10DetailedreadingReadthetextcarefullyandtrytofindouthowmanypartswecandividethetextintoandfindoutthemainideaofeachpart.MainideaPart1(Para1)IntroduceadebateovertheissueofglobalwarmingPart2(Para2to4)illustrateho

8、wglobalwarmingcomesaboutPart3(Para5to10)listtwo