选修6-global-warming-单元课件

Unit4GlobalWarmingwarming-up&Reading•Energysources?•Internationalrelations?•Money?•Technology?Whichisthemostimportanttoacountry?•…•Manpower?energysourcesWedependonenergytodomanythingsinourdailylives.Forexample,energylightsourcitiesandheatsourbuildings.Makealistofthingsthatuseenergyinyourhome,inyourschool,oranyotherplacesyoucanthinkof.stovelightthingsthatuseenergyinyourhomemicro-waveovencassetteplayerheatingtelevisionhairdryervideoplayerfridgecomputerwashingmachinestoveWindenergyisusedaspowertoproduceelectricity.Windmillswhereelectricityisproducedbyburningcoals.Thecoalpowerstationsafacilitydesignedtoconvertnuclearenergyintoelectricity.Anuclearpowerplantontheroofofahouseonabrightsunnydayareusedtocollectsolarenergy,makingyourhousewarmorheatingyourwater.Solarpanelsareusedtokeepbackwaterandraiseitslevelforirrigationorforproducingelectricity,etc.TheHydro-electricdamsGuessit!UraniumOre(铀矿石)Theelementuraniumdoesnotoccurinpureforminnaturebutisfoundinmineralssuchascarnotite（钒钾铀矿）,picturedhere.Whatsourceofenergy?Geysers(间歇泉)Geothermal(地热的)EnergyPlantAnenergysourceis“renewable”whensuppliesofitneverrunoutand“non-renewable”whenonedaytheywillrunout.Whichenergysourcesonyourlistarerenewableandwhicharenon-renewable?Discussnon-renewablerenewableWhatarethesebuildingsmadeofandwhataretheycalled?What’stheuse?glass/greenhouseAgreenhouseisusedforgrowingplants,especiallyduringcoldweather.Theglasstrapstheheatfromthesun,makingtheairwarmsothatplantscangrowbetter.trap…from…:keepsthinaplace存住…中的…HowdoesitworkGreenhousegases?Intheatmospheresurroundingtheearththerearegases,whicharecalled“greenhousegases”,mainlyincluding____________,andwatervapor(水蒸气).carbondioxideCarbondioxideMethaneWatervaporWhatdoyouthinkgreenhousegasesdo?Greenhousegasesperformthesamefunctionasthe______inagreenhouse---They______theheatofthesunandtherefore_______theearth.Itisknownas___________________.Nowadaysourearthisbecoming___________________.greenhouseeffecttrapwarmwarmerandwarmerglassP26TheEarthisBecomingWarmer---ButDoesItMatter?FastreadingThisarticleisfrom________.a.amagazineb.theinternetc.abookIthasatitle,afirstparagraphthatrunsacrossthepageandisinbold,themaintextintwocolumns,graphs/diagrams,twoquotes.Whatisthestructureofamagazinelikethisandhowisthetextorganized?1.Whatisthepurposeoftheparagraphthatisinbold?Tointroducethetopic.Toillustrate(阐述)pointsbyprovidingevidence.2.Whatarethediagramsfor?Questionnaires-I3.Whyaretheretwoquotes?Becausetheyareimportantorinterestingpoints.Theiraimistoattractyourattentionandtomakeyoureadthem,andthereforetomakeyouinterestedenoughtoreadthewholearticle.Itfunctionsasaconclusionbyaskingthereadertoreflectonthemajorthemeofthetextandtopredictwhatmighthappeninthefuture.4.Whatisthepurposeofthelastparagraphofthearticle?SophieArmstrong,EarthCare.Globalwarming.1.Whowrotethemagazinearticle?Whatisthenameofthemagazine?2.Whatisthemaintopicofthearticle?GlanceandAnswer!DrJaniceFoster;CharlesKeeling;GeorgeHambley.3.Whatarethenamesofthethreescientistsmentionedinthearticle?GlanceandAnswer!4.Whatarethetwographsabout?Graph1showsthetemperatureincreaseofonedegreeFahrenheitbetween1860to2000.Graph2showsthecarbondioxidecontentintheatmospherefrom1957to1997.Graph1:Graph2:TrueandFalse?P27-2Whatattitudesamongscientiststowardsglobalwarming?ThedifferentideasbetweenDr.JaniceFoster&GeorgeHambleyDr.JaniceFosterGeorgeHambleyCarbondioxidehascausedtheglobaltemperatureto__________.Anincreaseoffivedegreeswouldbea____________andcouldbe______________.Morecarbondioxideisa__________thing,whichmakescrops__________andwillencourage____________________.goupcatastropheveryseriouspositiveproduceagreaterrangeofanimalsSomepeopleothersThesealevel____________________________.predict_______________________,________,______,____________________________,and____________________________.risebyseveralmetresseverestormsdroughtsfaminesthespreadofdiseasesthedisppearanceofspeciesOtherpeople’sideafloodsMaybe…Thesealevelwillrise.Maybe…Therewillbesomedisasters,suchas…Flood!DroughtFamineForestFire!…Discussion:Whataretheeffectsofglobalwarming?Badpoints:1.Thesealeveltorise2.Severestorms,droughts,floods,famines,thespreadofdiseasesandthedestructionofspecies.Goodpoints:1.Makeplantsgrowfaster2.Cropswillproducemore3.EncourageagreaterrangeofanimalsYesorno?2.Shouldwedoanythingaboutglobalwarming?1.Doyouthinktherisksofglobalwarmingaregreat?DebateWeshoulddosomethingaboutglobalwarming.Weshoulddonothingaboutglobalwarming.GroupA:GroupB:Agreement&Disagreement•Exactly.•Allright.•That’sright.•That’sagoodidea.•Ithinkso.•Icouldn’tagreemore.•That’sexactlymyopinion.•Idon’tthinkso.•I’mafraidnot.•I’mafraidIdisagreewithyou.•I’mafraidIhaveadifferentopinion..•Ithinkyouareabsolutelywrong.Whatareproblemsfacingtheearth?OverpopulationwaterpollutionDeforestationanddesertification采伐森林沙漠化EnergyshortageOzone(臭氧）lossandairpollutionPrivatecarsaregettingmoreandmorepopular.Ifyoucanaffordacaroneday,willyouthinkofbuyingone?DiscussionSummarySkimoverthepassage,andtellwhatyouhavelearntinclass.eg:I’velearnedthattheearthisbecomingwarmer.I’velearn