人教版 英语选修6第四单元.ppt

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1、Unit4GlobalwarmingReadingPre-reading1.Haveyoueverseenagreenhouse?ismadeofglassusedforgrowingplants,especiallyduringcoldweather.2.Howdoesthegreenhousework?Theairinsidewaswarmbecausetheglasstraps(挡住,吸收)theheatfromthesunandkeepsitfromescaping(逃跑).Thismakesthegreenhouseheatup(

2、热量上升)andsotheplantscangrowthroughout(在…期间)thecoldperiod.4.GreenhouseEffectGlobalwarmingGreenhousegasestrappedtheheatfromthesun,whichcausesthetemperatureofearthgoesup.THEEARTHISBECOMINGWARMERBUTDOESITMATTER?Reading1)Howmanyparagraphsdoesthereading2)Makeadivisionofthetext.Re

3、adthepassagequickly(3’)textconsistof?Pleasenumberthem.Fast-ReadingMainideasofeachpart:Part1(1)Introduceadebateovertheissueofglobalwarming.raisingaquestionPart2(2-5)Howglobalwarmingcomesabout.givingexamples,usinggraphs,explanationPart3(6)Listtwodifferentattitudesamongscient

4、iststowardsglobalwarming.Part3(7)It'suptoreaderstothinkanddecidewhetherpeopleshoulddosomethingaboutglobalwarmingornot.givingexamples,makingcontrastleavingaquestionAretheriskstoogreat?Socanyoupredictthefutureoftheglobalwarming?Whowritesthisarticle?SophieArmstrongofEarthCare

5、WhatroseaboutonedegreeFahrenheit?ThetemperatureoftheearthCarefulreadingPart1(1)Introductionofglobalwarming.2.___________________________1.___________________Part2(2-5)Howglobalwarmingcomesabout?theburningoffossilfuelshumanactivityCarbondioxideMethaneWhataretheGreenhousegas

6、es?1.2.3.WatervaporPart3(6-7)Whataretheeffectsofglobalwarming?ariseinthesealevelSeverestorms,droughts,famines,thespreadofdiseases,andthedisappearanceofspeciesMakeplantsgrowfastereffectsReadandanswerthequestions.1.Whowrotethemagazinearticle?Whatisthenameofthemagazine?2.What

7、arethenamesofthethreescientistsmentionedinthearticle?1.SophieArmstrong,EarthCare.2.DrJaniceFoster,CharlesKeeling,GeorgeHambley.3.Whatdothethreescientiststhinkaboutglobalwarming?believesitistheburningofmoreandmorefossilfuelsthatisresultinginabigincreaseincarbondioxide.Dr.Ja

8、niceFosterGeorgeHambleyCharlesKeelingthinkstheeffectsofglobalwarmingcouldbeveryserious(严重