人教高中英語選修6課件

Unit4GlobalWarmingUnit4GlobalWarmingReadingReadingWhatisthegreenhousemadeandusedfor?Whatisthegreenhousemadean人教高中英語選修6ppt課件人教高中英語選修6ppt課件Agreenhouseismadeofglassandisusedforgrowingplants,especiallyduringcoldweather.AgreenhouseismadeofHowdoesitwork?

Theairinsideiswarmbecausetheglasstrapstheheatfromthesunandkeepsitfromescaping.Thismakesthegreenhouseheatupandsothe

plantscangrow

throughoutthe

coldperiod.Howdoesitwork?Whatarethe“greenhousegases”?

Intheatmospheresurroundingtheearththerearegases,whicharecalled“greenhousegases”,includingcarbondioxide,methane(甲烷,沼氣)andwatervapor.Whatarethe“greenhousegasesWhatdoyouthinkgreenhousegasesdo?

Theytrapheatfromthesunandthereforewarmtheearth.WhatdoyouthinkgreenhouseMainideasofeachpartWritingtechniques(Paragraph1)Introduceadebateovertheissueofglobalwarming.RaisingaquestionSkimmingMainideasofeachpartWritingMainideasofeachpartWritingtechniques(Paragraphs23)Illustratehowglobalwarmingcomesabout.Givingexamples,usinggraphs,explanation.MainideasofeachpartWriting(Paragraphs45)Listtwodifferentattitudesamongscientiststowardsglobalwarming.Givingexamples,makingcontrast.

(Paragraphs45)Listtwodi(Paragraph6)It’suptoreaderstothinkanddecidewhetherpeopleshoulddosomethingaboutglobalwarmingornot.Usingaquestion,leavingreaderstothinkovertheissue.

(Paragraph6)It’suptoreadeReadthetextcarefullyandfillintheblanks.ScientistsOpinionJaniceFoster◆Weneed1______likecarbondioxide,methaneandwatervapour,butifweaddhuge2__________extracarbondioxidetotheatmospherebyburningfossilfuels,itwillcausethe3________________togoup.gasesquantitiesofglobaltemperatureReadthetextcarefullyandfiScientistsOpinionJaniceFoster◆Overthenext100yearstheamountofwarmingcouldbeaslowas1to1.5degreesCelsius,butitcouldbeashighas5degreesCelsius.◆Anincreaseoffivedegreeswouldbea4____________.catastropheScientistsOpinionJaniceFosterScientistsOpinionsGeorgeHambley◆Believesthatweshouldn’tworryabout5__________ofcarbondioxideintheair.◆Predictsthatanywarmingwillbemildwithfewbadenvironmental6___________.◆7_______thatmorecarbondioxideisactuallya8________thing,whichwillmakelifeforhumanbeingsbetter.highlevels

consequencesStatespositiveScientistsOpinionsGeorgeHamblChoosethebestanswersaccordingtothetext.1.WhichofthefollowingisTRUEaccordingtothetext?A.ThetemperatureoftheearthincreasedaboutonedegreeFahrenheitduringthe20thcentury.B.Thecarbondioxidecontentintheairincreasedby70partspermillionfrom1957to1997.C.Allscientistsacceptthedataingraph2exceptCharlesKeeling.D.JaniceFostersaysthatmorecarbondioxidewillmakeplantsgrowfaster.AChoosethebestanswersaccord2.WhichofthefollowingisDrJaniceFoster’sopinion?A.Theresultofthetemperatureincreasewillbeserious.B.Theamountofwarmingisnothingserious.C.Weneedn’tworryabouthighlevelsofcarbondioxide.D.Globalwarmingisanaturalphenomenon.A2.WhichofthefollowingisDComprehendingComprehending濃度單位濃度單位Answerthequestions.Whowrotethemagazinearticle?Whatisthenameofthemagazine?

SophieArmstrongwrotethemagazinearticle.ThenameofthemagazineisEarthCare.PostreadingAnswerthequestions.Postread2.Whatarethenamesofthethreescientistsmentionedinthearticle?

TheyareDr.JaniceFoster,CharlesKeelingandGeorgeHambley.2.Whatarethenamesofthet3.Whatdotheythinkaboutglobalwarming?Dotheyagreewithoneanother?

Theydon’tagreewitheachother.Dr.JaniceFosterthinkstheeffectsof

globalwarmingcouldbeveryserious.3.Whatdotheythinkaboutgl

GeorgeHambleythinksglobalwarmingwillbemildwithfewbadenvironmentalconsequences.

CharlesKeelingbelievesitistheburningofmoreandmorefossilfuelsthatisresultinginabigincreaseincarbondioxide.GeorgeHambleythinks4.Whatarethetwographsabout?

GraphIshowsthetemperatureincreaseofonedegreeFahrenheitbetween1860to2000.Graph2isaboutthecarbondioxidecontentintheatmosphere,1958--1990.4.Whatarethetwographsabo5.Whatisthemaintopicofthearticle?

Globalwarming/thewarmingoftheearth.5.Whatisthemaintopicoft2.Checkthestatementsonpage27True:3,5,6,7,8

False:1,2,4,9,10Correctsentences:1.Thetemperaturelastcenturyincreased

much.2.Noteveryonebelievesthatglobal

warmingiscausedbyhumanactivities.2.Checkthestatementsonpag4.Naturalgasisnotagreenhousegas

butafossilfuel.9.GeorgeHambleythinksthatmore

carbondioxideisapositivethingand

itwillmakeplantsgrowfaster.10.Itisunknownwhattheeffectsof

globalwarmingwillbe.4.NaturalgasisnotagreenhDebateInstructions●Getintogroupsofsix.Decidewhichthreeinyourgrouparegoingtoagreewiththestatement(GroupA)andwhichthreearegoingtodisagreewiththestatement(GroupB).Debate●GroupAdiscusswhytheyagreewiththestatement;GroupBdiscusswhytheydisagree.●GroupAandBgettogether.Telleachotherthereasonswhyagreeordisagreewiththestatement.●GroupAdiscusswhytheyagrSupplementarymaterialsfordebating

Globalwarming1.Theplanethaswarmedanywherefrom0.5to1.0°C(1to2°F)overthelastcentury.SupplementarymaterialsfordeThissmallamountmakesahugedifference,causingglacierstomeltand,potentially(潛在的),sealeveltorise.Wecouldseeevenmoreofthisinthefuture,(maybeanother3°C,or5°F)Thissmallamountmakesahglobalwarmingglobalwarmingglobalwarmingglobalwarming2.Adefinitionofglobalwarmingwouldhavetoincludeameasurable,consistenttemperaturerise,liketheonewehaveseeninrecenthistory.Aquestionremains–Isitanunusualchange?Muchdebateaboutthatone.2.Adefinitionofglobalwarm3.Theearthgetsonekindofenergy(visiblelight)fromthesunandgivesoffanotherkind(infrared紅外線).Thiskindiswhatgetstrappedby"greenhousegases"(GHG's)intheatmosphere.3.TheearthgetsonekindofGreenhousegases4.Theglobalwarminggreenhouseeffectreallyisabogus(假的)term.Agreenhousekeepswarmbyphysicallytrappingtheairinsideandpreventingconvection(對流).Theatmospherehelpskeeptheplanetwarmbytrappingoutgoingradiationinstead.Greenhousegases5.TheleadinggassesareCarbon-dioxide,Methane,Ozone(臭氧)andNitrousOxide(一氧化二氮).Gasanalyzersshowtheconcentrationsofthisstuffhaveincreasedsomewhatsincethebeginningoftheindustrialrevolu