人教版英语选修六第四单元阅读课件.ppt

globalwarming,Thingsthatuseenergyaroundusoratanyotherplaces:,Inahouse,lightstelevisioncassetteplayercomputerfridgestovewashingmachinehairdryervideorecorder,coaloilnaturalgaswind(power)sun(solarenergy)water(hydro-electricpower)thesea(tidalenergy)uranium(nuclearenergy)plantwaster(biomassenergy),Windmills,renewable.,What?Renewable?,WarmingupII(5m),What?Whatkind?Renewable?,Acoalpowerstation,non-renewable.,What?Whatkind?Renewable?,Ahydro-electricdam,renewable.,What?Whatkind?Renewable?,Anuclearpowerplant,non-renewable.,Geothermal(地热的)EnergyPlant,CoalOilNaturalgasUranium,Wind(windpower)Sun(solarenergy)Water(hydro-electricpower)Plantwaste(biomassenergy)Hotspringsorgeysers(geothermalenergy)Thesea(tidalenergy),Fossilfuels,Non-renewable,Renewable,Reading,Whatisthegreenhousemadeandusedfor?,Agreenhouseismadeofglassandisusedforgrowingplants,especiallyduringcoldweather.,Howdoesitwork?Theairinsideiswarmbecausetheglasstrapstheheatfromthesunandkeepsitfromescaping.Thismakesthegreenhouseheatupandsotheplantscangrowthroughoutthecoldperiod.,Whatarethe“greenhousegases”?Intheatmospheresurroundingtheearththerearegases,whicharecalled“greenhousegases”,includingcarbondioxide,methane(甲烷,沼气)andwatervapor.,Whatdoyouthinkgreenhousegasesdo?Theytrapheatfromthesunandthereforewarmtheearth.,greenhouseeffect,greenhouseeffect,(Paragraph1),Introduceadebateovertheissueofglobalwarming.,Raisingaquestion,Reading,(Paragraphs2-3),Illustratehowglobalwarmingcomesabout.,Givingexamples,usinggraphs,explanation.,(Paragraphs4-5),Listtwodifferentattitudesamongscientiststowardsglobalwarming.,Givingexamples,makingcontrast.,(Paragraph6),Itsuptoreaderstothinkanddecidewhetherpeopleshoulddosomethingaboutglobalwarmingornot.,Usingaquestion,leavingreaderstothinkovertheissue.,Readthetextcarefullyandfillintheblanks.,gases,quantitiesof,globaltemperature,catastrophe,highlevels,consequences,States,positive,Choosethebestanswers.1.WhichofthefollowingisTRUEaccordingtothetext?A.ThetemperatureoftheearthincreasedaboutonedegreeFahrenheitduringthe20thcentury.B.Thecarbondioxidecontentintheairincreasedby70partspermillionfrom1957to1997.C.Allscientistsacceptthedataingraph2exceptCharlesKeeling.D.JaniceFostersaysthatmorecarbondioxidewillmakeplantsgrowfaster.,A,2.WhichofthefollowingisDrJaniceFostersopinion?A.Theresultofthetemperatureincreasewillbeserious.B.Theamountofwarmingisnothingserious.C.Weneedntworryabouthighlevelsofcarbondioxide.D.Globalwarmingisanaturalphenomenon.,A,Glancequicklyatthemagazinearticleandanswerthequestions.Whowrotethemagazinearticle?Whatisthenameofthemagazine?SophieArmstrongwrotethemagazinearticle.ThenameofthemagazineisEarthCare.,Whatarethenamesofthethreescientistsmentionedinthearticle?TheyareDr.JaniceFoster,CharlesKeelingandGeorgeHambley.,3.Whatdotheythinkaboutglobalwarming?Dotheyagreewithoneanother?Theydontagreewitheachother.Dr.JaniceFosterthinkstheeffectsofglobalwarmingcouldbeveryserious.,GeorgeHambleythinksglobalwarmingwillbemildwithfewbadenvironmentalconsequences.CharlesKeelingbelievesitistheburningofmoreandmorefossilfuelsthatisresultinginabigincreaseincarbondioxide.,Whatarethetwographsabout?GraphIshowsthetemperatureincreaseofonedegreeFahrenheitbetween1860to2000.Graph2isaboutthecarbondioxidecontentintheatmosphere,1958-1990.,Whatisthemaintopicofthearticle?Globalwarm