高二英语人教版选修6课件：Unit 4 Reading

首页 > 高中 > 英语 > 高二英语人教版选修6课件：Unit 4 Reading

高二英语人教版选修6课件：Unit 4 Reading

2023-03-04 08:25:01
52页
4.11 MB

点击预览全文

点击下载高清阅读全文，WORD格式文档可编辑

立即下载

资料简介

人教课标高二选修6Unit4,Unit4Globalwarming,,Warmingup,Fromthefollowingpictures,youwillknowwhereallthisenergycomesfrom.windmillsacoalpowerstation,anoilrefineryanuclearpowerplant,solarpanelshydro-electricdam,SamplelistsThingsthatuseenergySourcesofenergyRenewable/non-renewablelightheatingcoalnon-renewableoilnon-renewable,televisioncassetteplayervideorecordercomputernaturalgasnon-renewablewind(windpower)renewablesun(solarenergy)renewableuranium(nuclearenergy)non-renewable,fridgestovewashingmachinehairdryerwater(hydro-electric)renewableplantwaste(biomassenergy)renewablehotspringsorgeysers(geothermalenergy)renewablethesea(tidalenergy)renewable,Renewableornon-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.Raisingaquestion,MainideasofeachpartWritingtechniques(Paragraphs2–3)Illustratehowglobalwarmingcomesabout.Givingexamples,usinggraphs,explanation.,(Paragraphs4–5)Listtwodifferentattitudesamongscientiststowardsglobalwarming.Givingexamples,makingcontrast.,(Paragraph6)It’suptoreaderstothinkanddecidewhetherpeopleshoulddosomethingaboutglobalwarmingornot.Usingaquestion,leavingreaderstothinkovertheissue.,Carefulreading,Readthetextcarefullyandfillintheblanks.ScientistsOpinionJaniceFoster◆Weneed______likecarbondioxide,methaneandwatervapour,butifweaddhuge___________extracarbondioxidetotheatmospherebyburningfossilfuels,itwillcausethe________________togoup.gasesquantitiesofglobaltemperature,ScientistsOpinionJaniceFoster◆Overthenext100yearstheamountofwarmingcouldbeaslowas1to1.5degreesCelsius,butitcouldbeashighas5degreesCelsius.◆Anincreaseoffivedegreeswouldbea___________.catastrophe,ScientistsOpinionsGeorgeHambley◆Believesthatweshouldn’tworryabout__________ofcarbondioxideintheair.◆Predictsthatanywarmingwillbemildwithfewbadenvironmental____________.◆______thatmorecarbondioxideisactuallya________thing,whichwillmakelifeforhumanbeingsbetter.highlevelsconsequencesStatespositive,II.Choosethebestanswer.1.Thefirstgraphinthetextisusedto________.A.attractreaders’attentionB.introducethetopicofglobalwarmingC.actasanexampleD.supporttheopinionandmakeitmoreconvincing,2.Theauthorprobablyagreesthat________.A.globalwarmingisgoodforusB.wecandonothingaboutglobalwarmingC.catastropheswillhappeniftheglobekeepsonwarmingD.muchremainstobefoundoutabouttheeffectsofglobalwarming,Postreading,Glancequicklyatthemagazinearticleandanswerthequestions.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).Debate,●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.Agreenhousekeepswarmbyphysicallytrappingtheairinsideandpreventingconvection(对流).Theatmospherehelpskeeptheplanetwarmbytrappingoutgoingradiationinstead.,5.TheleadinggassesareCarbon-dioxide,Methane,Ozone(臭氧)andNitrousOxide(一氧化二氮).Gasanalyzersshowtheconcentrationsofthisstuffhaveincreasedsomewhatsincethebeginningoftheindustrialrevolution.,6.ThegreenhouseeffectraisestheaveragetemperatureoftheEarthbymorethan30degrees,sowithoutittheEarthwouldbeaverycoldplace!greenhouseeffect,,Homework1.Readthepassageagainandreviewthenewwordsandexpressions.2.Preparethedebateingroups.3.PreviewUsingLanguage–WHATCANWEDOABOUTGLOBALWARMING?, 查看更多