高中英语warming up and prereading课件人教版选修六.ppt

unit4,-warmingupandreading,globalwarming,isthewholeworldbecomingwarmerandwarmer?why?,energysources,wedependonenergytodomanythingsinourdailylives.forexample,energylightsourcitiesandheatsourbuildings.makealistofthingsthatuseenergyinyourhome,inyourschool,oranyotherplacesyoucanthinkof.,stove,light,thingsthatuseenergyinyourhome,micro-waveoven,cassetteplayer,heating,television,hairdryer,videoplayer,fridge,computer,washingmachine,stove,whereelectricityisproducedbyburningcoals.,thecoalpowerstations,inwhichoilisrefinedandmadepure.,theoilrefineries,windenergyisusedaspowertoproduceelectricity.,windmills,afacilitydesignedtoconvertnuclearenergyintoelectricity.,anuclearpowerplant,ontheroofofahouseonasunnydaysolarpanelsareusedtocollectsolarenergy,makingyourhousewarmorheatingyourwater.,solarpanels,areusedtokeepbackwaterandraiseitslevelforirrigationorforproducingelectricity,etc.,thehydro-electricdams,whatsourceofenergy?,geysers(间歇泉),geothermal(地热的)energyplant,anenergysourceis“renewable”whensuppliesofitneverrunoutand“non-renewable”whenonedaytheywillrunout.whichenergysourcesonyourlistarerenewableandwhicharenon-renewable?,discuss,light,heating,television,cassetteplayer,videoplayer,computer,fridge,stove,washingmachine,hairdryer,coal,oil,naturalgas,wind(windpower),sun(solarenergy),uranium(nuclearenergy),water(hydro-electricpower),plantwaste(biomassenergy),hotspringorgeysers(geothermalenergy),thesea(tidalenergy),non-renewable,non-renewable,non-renewable,renewable,renewable,non-renewable,renewable,renewable,renewable,renewable,whatarethesebuildingsmadeofandwhatistheirpurpose?,theyaremadeofglassandplantscangrowinitwhenitiscoldoutside.,howdoesitwork?,theglasstrapstheheatfromthesun,makingtheairwarmsothatplantscangrowbetter.,greenhousegases!,whatsgreenhousegaseseffect?,greenhousegasesperformthesamefunctionastheglassinagreenhouse-theytraptheheatofthesunandkeeptheairsurroundingtheearthwarm.itiscalledthegreenhouseeffect.,globalwarminghasbecomethebigissuefromnowon.manyislandswilldisappearinthenearfuture.itishorrible.icantimagineit.soletusprotectourenvironment!,peoplearoundtheworldmayfeelthattheclimatehasbeengettingsteadilywarmerandwarmerinrecentyears.placeswhichusedtobeabundantinsnowfallhavefrequentlyexperiencedwinterswithoutsnow.droughtlastslongerinsomedryareas.peoplefindthatwithoutairconditionerstheycouldhardlyworkorfallasleeponhottersummerdays.,thesideeffectsofglobalwarmingarealarming.awarmerglobalclimatemeltstheicecaps,raisingsealevels.whatismore,itdisturbsweatherpatterns,causingdroughts，severestorms,hurricanes（飓风.peoplesufferalotfromdisastersrelevanttoglobalwarming.,tostopglobalwarmingweshouldmakeimmediateandcontinualefforts.wehopethesituationwillsoonchange.globalwarmingcatchesandholdsourconcern，foritaffectsusandwillaffectourlatergenerations.wecannotwaitanylonger.doit.doitright.doitrightnow.,discussion:,nowyouaregoingtodiscussthestatement:takeactionsorwait?weshoulddonothingaboutglobalwarming.1.getintogroupsofsix.decidewhichthreeinyourgrouparegoingtoagreewiththestatement(groupa)andwhichthreearegoingtodisagreewiththestatement(groupb),2.groupastudentsdiscusswhytheyagreewiththestatemen