人教版高中英语选修六Unit4GlobalWarmingReading课件

人教版选修六Unit4GlobalWarmingUnit4GlobalwarmingDoyouknowtheseenergyresources?Arethey“renewable”or“non-renewable”?solarpanelshydro-electricdamrenewablenaturalgasnuclearenergynon-renewable

coaloilnon-renewablerenewablewindsolarengerywaterWhatisthegreenhousemadeandusedfor?Agreenhouseismadeofglassandisusedforgrowingplants,especiallyduringcoldweather.Howdoesitwork?

Theairinsideiswarmbecausetheglasstrapstheheatfromthesunandkeepsitfromescaping.Thismakesthegreenhouseheatupandsotheplantscangrowthroughoutthecoldperiod.Whatarethe“greenhousegases”?

Intheatmospheresurroundingtheearththerearegasescalled“greenhousegases”,includingcarbondioxide,methane(甲烷,沼气)andwatervapor.Whatdoyouthinkgreenhousegasesdo?

Theytraptheheatofthesunandkeeptheairsurroundingtheearthwarm.

MainideasofeachpartWritingtechniques(Paragraph1)Introduceadebateovertheissueofglobalwarming.RaisingaquestionMainideasofeachpartWritingtechniques(Paragraphs23)Illustratehowglobalwarmingcomesabout.Givingexamples,usinggraphs,explanation.(Paragraphs45)Listtwodifferentattitudesamongscientiststowardsglobalwarming.Givingexamples,makingcontrast.

(Paragraph6)It’suptoreaderstothinkanddecidewhetherpeopleshoulddosomethingaboutglobalwarmingornot.Usingaquestion,leavingreaderstothinkovertheissue.

Readthetextcarefullyandfillintheblanks.ScientistsOpinionJaniceFoster◆Weneed______likecarbondioxide,methaneandwatervapour,butifweaddhuge___________extracarbondioxidetotheatmospherebyburningfossilfuels,itwillcausethe________________togoup.gasesquantitiesofglobaltemperatureScientistsOpinionJaniceFoster◆Overthenext100yearstheamountofwarmingcouldbeaslowas1to1.5degreesCelsius,butitcouldbeashighas5degreesCelsius.◆Anincreaseoffivedegreeswouldbea___________.catastropheScientistsOpinionsGeorgeHambley◆Believesthatweshouldn’tworryabout__________ofcarbondioxideintheair.◆Predictsthatanywarmingwillbemildwithfewbadenvironmental____________.◆______thatmorecarbondioxideisactuallya________thing,whichwillmakelifeforhumanbeingsbetter.highlevelsconsequencesStatespositiveII.Choosethebestanswer.1.Thefirstgraphinthetextisusedto________.attractreaders’attention B.introducethetopicofglobalwarmingC.actasanexample D.supporttheopinionandmakeitmoreconvincing2.Theauthorprobablyagreesthat________.globalwarmingisgoodforus B.wecandonothingaboutglobalwarmingC.catastropheswillhappeniftheglobekeepsonwarmingD.muchremainstobefoundoutabouttheeffectsofglobalwarmingPart1:Answerthequestions.Whowrotethemagazinearticle?Whatisthenameofthemagazine?

SophieArmstrongwrotethemagazinearticle.ThenameofthemagazineisEarthCare.ExercisesonPage27:2.Whatarethenamesofthethreescientistsmentionedinthearticle?

TheyareDr.JaniceFoster,CharlesKeelingandGeorgeHambley.3.Whatdotheythinkaboutglobalwarming?Dotheyagreewithoneanother?

Therearesomeverydifferentattitudesamongscientiststowardsthisissue.Somethinktheeffectswillbeterrible,whilesomeothersbelievethatweshouldnotworryaboutit.GraphIshowsthetemperatureincreaseofonedegreeFahrenheitbetween1860to2000.4.Whatarethetwographsabout?Graph2showsthecarbondioxidecontentintheatmospherefrom1957to1997.5.Whatisthemaintopicofthearticle?

Globalwarming/thewarmingoftheearth.急诊室Thetemperatureinthelastcenturydidnotseemtoincreasemuch.Everyonebelievesthatglobalwarmingiscausedbytheactivitiesofhumans.3.JaniceFosterbelievesthatshecanmeasurethefutureglobalriseintemperature.4.Theriseincarbondioxideiscausingasteadyincreaseinglobalwarming.5.GeorgeHambleybelievesthatglobalwarmingwilldogoodratherthanharmtotheearth.6.Itisclearwhattheeffectsofglobalwarmingwillbe.ListenandRead：Ⅳ.语篇完形

Thereisno1.______thattheearthisbecomingwarmerandthatitishumanactivity2.____hascausedthisglobalwarming.Allscientists3._________totheviewthattheincreaseintheearth’stemperatureis4.____totheburningoffossilfuels.DrJaniceFosterexplainsthatweaddhuge5._________ofextracarbondioxideintothe6.___________,whichcausestheglobaltemperaturetogoup.AnotherscientistcalledCharlesKeelingmadeaccurate7._____________oftheamountofcarbondioxideintheatmosphere.Buttheattitudesofscientiststowardsthisrisearecompletely8.________.Manythinkthetrendwouldleadtoa9.___________whilesomebelieveweshouldn’tworryaboutit.Infact,nooneexactlyknowsthe10.______ofglobalwarming.Should

wedonothingaboutglobalwarming？Andwhy？Discussion：Supplementarymaterialsfordebating

Globalwarming1.Theplanethaswarmedanywherefrom0.5to1.0°C(1to2°F)overthelastcentury.Thissmallamountmakesahugedifference,causingglacierstomeltand,potentially(潜在的),sealeveltorise.Wecouldseeevenmoreofthisinthefuture,(maybeanother3°C,or5°F)2.Adefinitionofglobalwarmingwouldhavetoincludeameasurable,consistenttemperaturerise,liketheonewehaveseeninrecenthistory.Aquestionremains–Isitanunusualchange?Muchdebateaboutthatone.3.Theearthgetsonekindofenergy(visiblelight)fromthesunandgivesoffanotherkind(infrared红外线).Thiskindiswhatgetstrappedby“greenhousegases”(GHG’s)intheatmosphere.Greenhousegases4.Theglobalwarminggreenhouseeffectreallyisabogus(假的)term.Agreenhousekeepswarmbyphysicallytrappingtheairinsideandpreventingconvection(对流).Theatmospherehelpskeeptheplanetwarmbytrappingoutgoingradiationinstead.5.TheleadinggassesareCarbon-dioxide,Methane,Ozone(臭氧)andNitrousOxide(一氧化二氮).Gasanalyzerssh