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大小:1.64 MB
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时间:2021-01-23
《新人教选修六-Unit-4-Global-warming[单元课件]学习资料.ppt》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、新人教选修六-Unit-4-Global-warming[单元课件]TheeffectsofglobalwarmingPositiveeffects:1makeplantsgrowfaster;2cropswillproducemore;3makelifebetterEnergysources?Internationalrelations?Money?Technology?Whichisthemostimportanttoacountry?…Manpower?energysourcesWedependonener
2、gytodomanythingsinourdailylives.Forexample,energylightsourcitiesandheatsourbuildings.Makealistofthingsthatuseenergyinyourhome,inyourschool,oranyotherplacesyoucanthinkof.stovelightthingsthatuseenergyinyourhomemicro-waveovencassetteplayerheatingtelevisionhairdr
3、yervideoplayerfridgecomputerwashingmachinestoveWindenergyisusedaspowertoproduceelectricity.Windmillswhereelectricityisproducedbyburningcoals.Thecoalpowerstationsinwhichoilisrefinedandmadepure.TheOilRefineriesafacilitydesignedtoconvertnuclearenergyintoelectric
4、ity.Anuclearpowerplantontheroofofahouseonabrightsunnydayareusedtocollectsolarenergy,makingyourhousewarmorheatingyourwater.Solarpanelsareusedtokeepbackwaterandraiseitslevelforirrigationorforproducingelectricity,etc.TheHydro-electricdamsAnenergysourceis“renewab
5、le”whensuppliesofitneverrunoutand“non-renewable”whenonedaytheywillrunout.Whichenergysourcesonyourlistarerenewableandwhicharenon-renewable?DiscussionCoalOilNaturalgasUranium[化]铀(nuclearenergy)FossilfuelsNon-renewableWind(windpower)Sun(solarenergy)Water(hydro-e
6、lectricpower)Plantwaste植物性废物(biomassenergy生物团能量)Hotspringsorgeysers间歇泉(geothermalenergy)Thesea(tidalenergy潮汐能)RenewableWhatarefossilfuels?FossilfuelsareAncientanimalandplantmaterialbelowthesurfaceoftheearthwithahighcarboncontent,suchascoal,oilandnaturalgas,wh
7、ichcanbeburnttoproduceenergy.Theyarealsoknownasnon-renewableenergybecauseoncetheyarerunoutof/runout,theycannotberenewed.Whatarethesebuildingsmadeofandwhatistheirpurpose?Theyaremadeofglassandplantscangrowinitwhenitiscoldoutside.Howdoesitwork?Theglasstrapsthehe
8、atfromthesun,makingtheairwarmsothatplantscangrowbetter.Greenhousegases!What’sgreenhousegaseseffect?Greenhousegasesperformthesamefunctionastheglassinagreenhouse---Theytraptheheatofthesunan
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