unit4-The-earth-is-becoming-warmer阅读课件

⊙Whatisitinthepicture?It’sa__________madeofglass.greenhouse⊙Whatisitusedfor?It’susedfor________________,especiallyduringcoldweather.growingplantsHowdoesitwork?Theairinsideiswarmbecausetheglasstrapstheheatfromthesunandkeepsitfromescaping.Thismakesthegreenhouseheatupandsotheplantscangrowthroughoutthecoldperiod.Theearthisbecomingwarmer——Butdoesitmatter?Readinghot!!!Skimthetitle:THEEARTHISBECOMINGWARMER–BUTDOESITMATTER?Whatisthemaintopic?A.Theearth.B.Globalwarming.C.Becomingwarmerdoesn’tmatter.Lookatthetitleandthestructureofthearticle.A.NewspaperB.NovelC.MagazineGuessWheredoesthisarticlemostprobablycomefrom?FeaturesofThisMagazineArticle1title2openingparagraph3twographs4maintextintwocolumnsLookatthetitleandthestructureofthearticle.A.NewspaperB.NovelC.MagazineWheredoesthisarticlemostprobablycomefrom?Readthetitleandtheopeningparagraph,thenanswerthefollowingquestions:1.Whowrotethearticle?2.Whatisthenameofthemagazine?FastReadingSophieArmstrongEarthCare1.Whowrotethisarticle?2.Whatisthenameofthemagazine?SkimmingTheorganizationofthearticle:IntroductionAtitleBodyConclusionSkimmingSkimthebodypart(7paras):Para.1Para.2-3IIIPara.4-6IIIPara.7IV★★★★IntroductionBodyConclusionScanningMatchthemainideaofeachpart:•Explainhowglobalwarmingcomesabout.•Twodifferentattitudesamongscientiststowardstheconsequencesofglobalwarming.•Introducetheproblemofglobalwarming.•Giveawarningandraiseaquestionforthereaderstothinkover.I(1)II(2-3)III(4-6)IV(7)I(1)II(2-3)III(4-6)IV(7)★★★★CarefulreadingHumanactivityornaturalphenomenonWhathascausedglobalwarming?:Para.2PartII(Para2-3)Whatcanwelearnfromgraph1?Graph1showsthetemperaturedifferenceonaveragefrom1860to2000.ItshowsthetemperatureincreaseofonedegreeFahrenheitbetween1860and2000.2.TranslatethewholeparagraphintoChinese.毫无疑问，地球是在变暖，而地球变暖正是人类活动导致而成的，并非是一种无规律的自然现象。Howhasglobalwarmingcomeabout?:Para.3Illustratecauses/reasonsbygivingexamplesPartII(Para2-3)Tobeginwith,theincreaseoftheearth’stemperatureisdueto_____________.theburningoffossilfuelsInaddition,somebyproductsoftheburningprocessarecalled___________,themostimportantoneofwhichis__________.“greenhouse”gasescarbondioxidegreenhouseeffectCarbon-dioxideThegreenhousegasesincludeCarbon-dioxide,methane,watervapour.Greenhouseeffectisanaturalp.Greenhousegasesintheatmospherecanwarmtheearthbytrappingheatenergy.Buttheproblembeginswhenweaddhugeqofextracarbondioxidetotheatmospherebyburningfossilf.Therefore,moreheatenergyistintheatmosphere.Itistheincreasedamountofcarbondioxidethatisringlobalwarming.FillintheblanksaboutthecausesofGreenhouseeffect.henomenonuantitiesuelsrappedesultingPartII(Para2-3)Whatdoyouthinkofthegreenhouseeffect?Greenhouseeffectisnecessaryforus.Buttoomanygreenhousegaseswillcausetheglobetobetoowarmer.CharlesKeeling’smeasurements:Para.4PeopleacceptCharlesKeeling’sdatabecausehetookaccuratemeasurements.PartIII(Para4-6)Thegraphshowsthat…CharlesKeeling1997Itshowsthecarbondioxidecontentintheatmospherefrom1957to1997.WhatdoesDr.JaniceFostersay?:Para.5DataPartIII(Para4-6)Shesaysthatoverthenext___yearstheamountofwarmingcouldbeaslowas__to__degreesCelsius,butitcouldbeashighas___degrees.10011.55DrJaniceFosterGeorgeHambleyscientistsaredebatingoverthepossibleeffectsofgreenhousegases.Pleaseexpresstheirdifferentopinions.Para.6DifferentattitudesPartIII(Para4-6)AttitudestotheRiseopinionsThe_____thatthetemperatureincreasesbyfivedegreeswouldbea___________anditcouldbevery_______.Weshouldnotworryaboutit.Anywarmingwillbe____withfewbad________________________________.Itisactuallya________thing.trendseriousmildenvironmentalpositiveJaniceFosterGeorgeHambleycatastropheconsequences1.causethesealeveltorise2.severestorms3.droughts/floods4.famines5.thespreadofdiseases6.disappearanceofspeciesPositiveeffectsNegativeeffects1.causethesealeveltorise2.severestorms3.droughts/floods4.famines5.thespreadofdiseases6.disappearanceofspeciesPositiveeffectsNegativeeffects1.makeplantsgrowfaster2.cropswillproducemore3.agreaterrangeofanimals4.makelifebetter…:Para.7conclusionItisclearwhattheeffectsofglobalwarmingwillbe.Usequestions,leavingreaderstothinkovertheissuePartⅣDebateABA:Weshalldosomethingaboutglobalwarming.B:Weshalldonothingaboutglobalwarming.Theearthisbecomingwarmerdoesitmatter?Whatcanwedoaboutglobalwarming?Ononehand,weshouldprotectourenvironment.Weshouldmakeeffortstocontrolallkindsofpollution.Ontheotherhand,weshouldsaveenergyandmakefulluseofeverybitofenergy.Globalwarmingisnotaproblemthatcanbeignored.Weshoulddosomethingtoavoidtherisksahead.Asstudents,weshouldstartfromleadingalow-carbondailylife.Forexample,athome,wecanturnofftherunningwaterwhilebrushingourteeth.Onthewaytoschool,wecanrideabike.Andatschool,wecanrecyclethepaper.Therearemanythingswecandotohelp.Andpleaseremember,nomatterhowsmallthesethingsmaylook,yourcontributioncounts!United,wecanmakeabigdifference!Loveourplanet!Lovelife!Startfromeverylittlebittofightagainstglobalwarming.