人教版高中英语选修六Unit 4 Global warming Warming-up amd reading PPT课件.ppt

Warmingup,Wordsandexpressions,Fossilfuel(化石燃料):Ancientanimalandplantmaterialbelowthesurfaceoftheearthwithahighcarboncontent,suchascoal,oilandnaturalgas,whichcanbeburnttoproduceenergy;alsoknownasnon-renewableenergybecauseoncetheyareusedtheyhavegoneforever;theycannotberenewed.,Whatarefossilfuels?,Fromthefollowingpictures,youwillknowwhereallthisenergycomesfrom.,windmills(风车),acoalpowerstation,anoilrefinery,anuclearpowerplant,solarpanels,ahydro-electricdam,Samplelists,lightheatingtelevisioncassetteplayervideorecorder,oil,coal,naturalgas,wind(windpower),sun(solarenergy),renewable,renewable,non-renewable,non-renewable,non-renewable,fridge,stove,washingmachine,hair-dryer,water(hydro-electric),renewable,plantwaste(biomassenergy),renewable,hotspringsorgeysers(geothermalenergy),renewable,thesea(tidalenergy),renewable,computer,uranium(nuclearenergy),non-renewable,Renewableornon-renewable?,Renewableornon-renewable?,Whatistoldinthepicture?,non-renewableenergysource,NotestoRenewableenergyRenewableenergyresourcesmaybeuseddirectly,orusedtocreateothermoreconvenientformsofenergy.Examplesofdirectusearesolarovens,geothermal(地温)heating,andwaterandwindmills.,Examplesofindirectusewhichrequireenergyharvestingareelectricitygenerationthroughwindturbines(涡轮)orphotovoltaic(光电的)cells,orproductionoffuelssuchasethanol(酒精)frombiomass(生物量).,Renewableenergy(sources)orREScapturetheirenergyfromexistingflowsofenergy,fromon-goingnaturalprocesses,suchassunshine,wind,flowingwater,biologicalprocesses,andgeothermalheatflows.,Mostrenewableenergy,otherthangeothermalandtidalpower,ultimately(基本上)comefromtheSun.Someformsarestoredsolarenergysuchasrainfallandwindpowerwhichareconsideredshort-termsolar-energystorage,whereastheenergyinbiomass(生物量)isaccumulated(积聚)overaperiodofmonths,asinstraw,orthroughmanyyearsasinwood.,Capturingrenewableenergybyplants,animalsandhumansdoesnotpermanentlydeplete(耗尽)theresource.Fossilfuels,whiletheoreticallyrenewableonaverylongtime-scale,areexploitedatratesthatmaydepletetheseresourcesinthenearfuture.,1.Haveyoueverseenagreenhouse?,Pre-reading,2.Whatisthegreenhousemadeandusedfor?,Agreenhouseismadeofglassandisusedforgrowingplants,especially(特别，尤其)duringcoldweather.,3.Howdoesthegreenhousework?,Theairinsidewaswarmbecausetheglasstraps(挡住，吸收)theheatfromthesunandkeepsitfromescaping（逃跑）.Thismakesthegreenhouseheatup（热量上升）andsotheplantscangrowthroughout(在期间)thecoldperiod.,2019/12/11,Whatarethe“greenhousegases”?Whatdoyouthinkgreenhousegasesdo?,GreenhouseGases,2019/12/11,greenhouseeffect,2019/12/11,Greenhouse,Atmosphere,Glancequicklyatthemagazinearticleandanswerthequestions.,1.Whowrotethemagazinearticle?Whatisthenameofthemagazine?,SophieArmstrong.EarthCare.,2.Whatarethenamesofthethreescientistsmentionedinthearticle?,DrJaniceFoster,CharlesKeeling,GeorgeHambley.,3.Whatdotheythinkaboutglobalwarming?Dotheyagreewithoneanother?,Therearesomeverydifferentattitudesamongscientiststowardsthisissue.Somethinktheeffectswillbeterrible,whilesomeothersbelievethatweshouldnotworryaboutit.,4.Whatarethetwographsabout?,Graph1showsthetemperatureincreaseofonedegreeFahrenheitbetween1860to2000.Graph2showsthecarbondioxidecontentintheatmospherefrom1957to1997.,5.Whatisthemaintopicofthearticle?,Globalwarming,Construct,Mainideasofeachpart,Part1(1),Introduceadebateovertheissueofglobalwarming.,Readthepassagecarefullyandjudgewhetherthestatementsaretrueorfalse?Thetemperatureinthelastcenturydidnotseemtoincreasemuch.Everyonebelievesthatglobalwarmingiscausedbytheactivitiesofhumans.JaniceFosterbelievesthatshecanmeasurethefutureglobalriseintemperature.,F,T,T,4.Theriseincarbondioxideiscausingasteadyincreaseinglobalwarming.5.GeorgeHambleybelievesthatglobalwarmingwilldogoodratherthanharmtotheearth.6.Itisclearwhattheeffectsofglobalwarmingwillbe.,T,T,F,1.Greenhousegasesreferto_.A.carbondioxideB.theburningoffossilfuelsC.byproductsoftheburningoffossilfuelsD.coal,naturalgasandoil,C,Scanning,2.Greenhouseeffect_.A.isanaturalphenomenonB.happenswhentherestoomuchcarbondioxideC.doesgreatharmtohumanbeingsD.makeslifeforhumanbeingsbetter,A,3.WhichofthefollowingisTRUEaccordingtothetext?A.ThetemperatureoftheearthincreasedaboutonedegreeFahrenheitduringthe20thcentury.B.Thecarbondioxidecontentintheairincreasedby70partspermillionfrom1957to1997.C.Allscientistsacceptthedataingraph2exceptCharlesKeeling.D.JaniceFostersaysthatmorecarbondioxidewillmakeplantsgrowfaster.,A,4.WhichofthefollowingisDrJaniceFostersopinion?A.Theresultofthetemperatureincreasewillbeserious.B.Theamountofwarmingisnothingserious.C.Weneedntworryabouthighlevelsofcarbondioxide.D.Globalwarmingisanaturalphenomenon.,A,5._foundouttheamountofcarbondioxideintheatmospherefrom1957to1977.A.Dr.JaniceFosterB.CharlesKeelingC.GeorgeHambleyD.SophieArmstrong,A,6.Theauthorprobablyagreesthat_.A.actuallyglobalwarmingisgoodformanB.weshoulddonothingabouttheglobalwarmingC.catastropheswillhappeniftheglobekeepsonwarmingD.alotremainstobefoundoutabouttheeffectsofglobalwarming,D,1.Howhastheglobalwarmingcomeabout?,Humanactivity-burningoffossilfuels.,Greenhouseeffect-greenhousegases-weneedthosegases.,Hugequantitiesofextracarbondioxide-from1957to1997-fromaround315partspermilliontoaround370partspermillion.,2.Whataretheeffectsofglobalwarming?,Encourageagreaterrangeofanimals.,Thesealeveltorise.,Severestorms,droughts,famines,thespreadofdiseases,anddestructionofspecies.,Makeplantsgrowfaster.Cropswillproducemore.,ThedifferentideasbetweenDr.JaniceFoster&GeorgeHambley,goup,catastrophe,veryserious,positive,producemore,agreaterrangeofanimals,Summary,Skimoverthepassage,and