Book6-Unit4-Reading教学讲解课件

Unit4GlobalWarming

Step1:Lead-in(EarthSong—byM.J.)Now,ourhome

--

theearthisfacingmanyterribleproblems…Whatishappeningtotheearth?airpollutionwaterpollutionflooddroughttoomanytreesarecutdown=

deforestationWhichisthemaintopicinthisunit?globalwarming

Whatis

globalwarming?Whatcaused

globalwarming?Whatcanwedoaboutglobalwarming?Reading(P.26):THEEARTHISBECOMINGWARMER—BUTDOESITMATTER?

hot!!!Learning&teachingaims:

Todevelopsomereadingabilities.Tolearnsomekeywordsandphrases.Todevelopthesenseof

environmentalprotection.Step2:CheckYourPreview(keywords)1.化石燃料2.副产品3.温室效应1.fossilfuels2.byproduct3.greenhouseeffect4.温室气体5.甲烷，沼气6.自然现象4.greenhousegases5.methanen.

6.naturalphenomenonStep2:CheckYourPreview(usefulpharses)1.发生;造成2.大量的3.上升;增长;升起4.导致1.comeabout2.quantitiesof3.goup

4.resultin5.同意;赞成;订购6.反对……7.增加，聚集8.继续5.subscribeto6.beopposedto7.buildup8.keeponStep3:Pre-readingGuessfromthetitleandthetwographs:Whatmaybetalkedaboutinthepassage?A.ThecauseoftheglobalwarmingB.ThephenomenonoftheglobalwarmingC.Itdoesn’tmatterthattheearthisbecomingwarmerD.BothAandBStep4:FastReading(formainidea)Part1c.anintroductionofglobalwarmingPart2Part3Part4d.Howglobalwarmingcomesabout?a.twodifferentattitudestowardsglobalwarmingb.

whetherpeopleshoulddosth.aboutglobalwarming(Para__)(Para__to_)(Para__)(Para__)12567

Howmanyparagraphsdoesthereadingtextconsistof?Pleasenumberthem.2)Makeadivisionofthetext.Step5:CarefulReading(fordetailedinformation)1.Whowrotethemagazinearticle?

2.Whatisthenameofthemagazine?

3.What’sthemeaningoftheword“explore”inLine.4?A.toexamineaproblemcarefully.B.toansweraproblemC.tovisitsomewhereSophieArmstrongEarthCarePart1(Para.1):anintroductionPart2(Para.2-5):thecauseofglobalwarming

Readpara1carefullyandanswer:

Whatisthecauseofglobalwarming?

HumanactivityGraph1showsthetemperatureincreases___________________between_____________________.onedegreeFahrenheit1860and2000①Humanactivity---burningoffossilfuelsCoal,naturalgasandoilbyproducts“greenhouse”gasescarbondioxide,methane甲烷,watervapourWhydogreenhousegasescausetheincreasingtemperature?Theytrap_____fromthesunandthereforewarm_________.Thisprocessiscalled

________________________greenhouseeffectheattheearthagreenhouse

Agreenhouseismadeof______

and

isusedfor______________,

especially

during_____weather.growingplantsglasscold

Howdoesagreenhousework?Theairinsidewaswarmbecausetheglasstraps(挡住,吸收)theheatfromthesunandkeepsitfromescaping(逃跑).

Thismakesthegreenhouseheat

up(热量上升)

andsotheplantscangrowthroughout(在…期间)thecoldperiod.3.GreenhouseEffect

GlobalwarmingGreenhousegasestrappedtheheatfromthesun,whichcausesthetemperatureofearthgoesup.

②Greenhouseeffect---greenhousegases---weneedthosegases.③WeaddhugequantitiesofextracarbondioxidetotheatmospherebyburningFossilfuels.theglobalwarmingPart2(Para.2-5):thecauseofglobalwarming

______offossilfuelshumanactivity

__________gasesareproducedanaturalphenomenoncalled____________________heatfromthesunTheearthis________burning

greenhousegreenhouseeffect

trap

warmedReadpart2carefullyandanswer:

Whatisthecauseofglobalwarming?

Whoistoblamefortheglobalwarming?Humanactivity?Ornaturalphenomenon?1Allscientistssubscribetotheviewthattheincreaseintheearth’stemperatureisduetotheburningoffossilfuelslike….toproduceenergy.that引导同位语从句所以得科学家赞同这种观点：人们为了生产能量而燃烧化石燃料（如煤、天然气和石油），从而引起了地球温度的升高。2Somebyproductsofthisprocessarecalled“greenhouse”gases,themostimportant

oneofwhichiscarbondioxide.one=gas介词+关系代词（指物用which)这个升温过程的一些副产品就叫做“温室气体”，其中最重要的就是二氧化碳。3Thisiswhensmallamountsofgasesintheatmosphere,likecarbondioxide,methaneandwatervapour,trapheatfromthesunandthereforewarmtheearth.When引导的表语从句这种现象发生在大气层中少量的气体（如二氧化碳甲烷、水蒸气等）吸收太阳的热量，因而使地球变暖的时候。4Withoutthe“greenhouseeffect“,theearthwouldbeaboutthirty–threedegreesCelsiuscoolerthanitis.含蓄虚拟语气，与现在事实相反如果没有温室效应，地球的温度将比现在的温度还要低33摄氏度左右。5TheproblembeginswhenweaddhugequantitiesofextracarbondioxideintotheAtmosphere.当我们在大气层中增加了大量额外的二氧化碳时，问题就来了。6Itmeansthatmoreheatenergytendsto

betrappedintheatmospherecausingtheglobaltemperaturetogoup.causing现在分词这意味着更多的热量被困在大气中，从而引起全球温度上升。Graph2showsthecarbondioxidecontentintheatmospherefrom1957to1997wentupfrom__________________to_________________.315partspermillion370partspermillionPart3:differentattitudestowardstheeffectsofglobalwarminggoupcatastrophe

veryserious

Carbondioxidehascausedtheglobaltemperatureto________.Anincreaseoffivedegreeswouldbea____________andcouldbe______________.Dr.JaniceFosterOtherexperts’opinions?Part3:twodifferentattitudestowardstheeffectsofglobalwarmingpositiveproducemoreagreaterrangeofanimalsGeorgeHambley

Morecarbondioxideisa__________thing,whichmakescrops_____________andwillencourage________________________.Part3(6-7)

ariseintheseelevelseverestormsdroughtsfloodsoptimisticItwillcause:pessimisticItisa_______thing,

whichmakesplantsgrow______;cropswillproduce

_____;itwillencourageagreaterrangeof_______－allofwhichwillmakelife_____.positivequickermoreanimalsbetterDr.JaniceFosterGeorgeHambleyPart3(Para.6):twodifferentattitudesBadeffectsGoodeffects1.thesealeveltorise2.severestorms风暴3.floods4.droughts干旱5.famines饥荒6.thespreadofdisease7.thedisappearanceofspecies1.makeplantsgrowfaster

2.cropswillproducemore庄稼产量更高3.agreaterrangeofanimals物种的丰富4.makelifebetter

JaniceFoster

GeorgeHambley1.Dotheydrawaconclusionatlast?2.Thewriterprobablythinks________.A.Itmatters.B.Itdoesn’tmatter.Part4(Para.7):Doesitmatter?NoPara.1IPara.7IVHowdoesthewriterwritethepassage?Para.2-5IIPara.6IIIIntroductionBodyConclusionStep6:Post-reading(organization)

Itiscertainthattheearthisbecomingwarmer,buttherearesomeverydifferentattitudestowardstheeffectsofglobalwarming.Somepeoplethinkthatifglobaltemperaturecontinuesgoingup,itwouldbeadisaster.Globalwarmingwouldleadtoariseinsealevel;otherspredictweatherchangeslikeseverestorms,droughts,famines,heatwaves,andheavysnowstorms,famines,thespreadofdiseases,andthedisappearanceofspecies.Ontheotherhand,therearethosewhobelievemorecarbondioxideisactuallyagoodthing.Itwillmakeplantsgrowfaster;andencourageagreatervarietyofanimals.agreaterrangeofkeepsoncatastropheresultinThereisnodoubtthatclimateStep6:Post-reading(consolidation)Replacetheunderlinedexpressionswiththewords,phrasesandpatternswehavelearnedinthepassage.positiveStep7:

Watchinganddiscussing1.Whatdoesthevideowantto