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人教课标高二选修6Unit4Fromthefollowingpictures,youwillknowwhereallthisenergycomesfrom.windmillsacoalpowerstationanoilrefineryanuclearpowerplantsolarpanelshydro-electricdamSamplelistsThingsthatuseenergySourcesofenergyRenewable/non-renewablelightheatingcoalnon-renewableoilnon-renewabletelevisioncassetteplayervideorecordercomputernaturalgasnon-renewablewind(windpower)renewablesun(solarenergy)renewableuranium(nuclearenergy)non-renewablefridgestovewashingmachinehairdryerwater(hydro-electric)renewableplantwaste(biomassenergy)renewablehotspringsorgeysers(geothermalenergy)renewablethesea(tidalenergy)renewableRenewableornon-renewable?Renewableornon-renewable?Whatistoldinthepicture?Whatisthegreenhousemadeandusedfor?Agreenhouseismadeofglassandisusedforgrowingplants,especiallyduringcoldweather.•Howdoesitwork?Theairinsideiswarmbecausetheglasstrapstheheatfromthesunandkeepsitfromescaping.Thismakesthegreenhouseheatupandsotheplantscangrowthroughoutthecoldperiod.•Whatarethe“greenhousegases”?Intheatmospheresurroundingtheearththerearegasescalled“greenhousegases”,includingcarbondioxide,methane(甲烷,沼气)andwatervapor.•Whatdoyouthinkgreenhousegasesdo?Theytraptheheatofthesunandkeeptheairsurroundingtheearthwarm.MainideasofeachpartWritingtechniques(Paragraph1)Introduceadebateovertheissueofglobalwarming.RaisingaquestionMainideasofeachpartWritingtechniques(Paragraphs2–3)Illustratehowglobalwarmingcomesabout.Givingexamples,usinggraphs,explanation.(Paragraphs4–5)Listtwodifferentattitudesamongscientiststowardsglobalwarming.Givingexamples,makingcontrast.(Paragraph6)It’suptoreaderstothinkanddecidewhetherpeopleshoulddosomethingaboutglobalwarmingornot.Usingaquestion,leavingreaderstothinkovertheissue.I.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________.A.attractreaders’attentionB.introducethetopicofglobalwarmingC.actasanexampleD.supporttheopinionandmakeitmoreconvincing2.Theauthorprobablyagreesthat________.A.globalwarmingisgoodforusB.wecandonothingaboutglobalwarmingC.catastropheswillhappeniftheglobekeepsonwarmingD.muchremainstobefoundoutabouttheeffectsofglobalwarmingGlancequicklyatthemagazinearticleandanswerthequestions.1.Whowrotethemagazinearticle?Whatisthenameofthemagazine?SophieArmstrongwrotethemagazinearticle.ThenameofthemagazineisEarthCare.2.Whatarethenamesofthethreescientistsmentionedinthearticle?TheyareDr.JaniceFoster,CharlesKeelingandGeorgeHambley.3.Whatdotheythinkaboutglobalwarming?Dotheyagreewithoneanother?Therearesomeverydifferentattitudesamongscientiststowardsthisissue.Somethinktheeffectswillbeterrible,whilesomeothersbelievethatweshouldnotworryaboutit.GraphIshowsthetemperatureincreaseofonedegreeFahrenheitbetween1860to2000.4.Whatarethetwographsabout?Graph2showsthecarbondioxidecontentintheatmospherefrom1957to1997.5.Whatisthemaintopicofthearticle?Globalwarming/thewarmingoftheearth.1.Thetemperatureinthelastcenturydidnotseemtoincreasemuch.2.Everyonebelievesthatglobalwarmingiscausedbytheactivitiesofhumans.3.JaniceFosterbelievesthatshecanmeasurethefutureglobalriseintemperature.4.Theriseincarbondioxideiscausingasteadyincreaseinglobalwarming.5.GeorgeHambleybelievesthatglobalwarmingwilldogoodratherthanharmtotheearth.6.Itisclearwhattheeffectsofglobalwarmingwillbe.Weshoulddonothingabouttheglobalwarming.Instructions●Getintogroupsofsix.Decidewhichthreeinyourgrouparegoingtoagreewiththestatement(GroupA)andwhichthreearegoingtodisagreewiththestatement(GroupB).●GroupAdiscusswhytheyagreewiththestatement;GroupBdiscusswhytheydisagree.●GroupAandBgettogether.Telleachotherthereasonsforagreeingordisagreeingwiththestatement.•SupplementarymaterialsfordebatingGlobalwarming1.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.Agreenhousekeepswarmbyphy