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ID:57248334
大小:1.73 MB
页数:112页
时间:2020-08-07
《选修六Unit4-Globalwarming]教学内容.ppt》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、Unit4GlobalWarmingTheeffectsofglobalwarmingNegativeeffects:1causethesealeveltorise;2severestorms;3droughts;4famine;5destructionofspecies6floodTheeffectsofglobalwarmingPositiveeffects:1makeplantsgrowfaster;2cropswillproducemore;3makelifebetterEnergyso
2、urces?Internationalrelations?Money?Technology?Whichisthemostimportanttoacountry?…Manpower?energysourcesWedependonenergytodomanythingsinourdailylives.Forexample,energylightsourcitiesandheatsourbuildings.Makealistofthingsthatuseenergyinyourhome,inyours
3、chool,oranyotherplacesyoucanthinkof.stovelightthingsthatuseenergyinyourhomemicro-waveovencassetteplayerheatingtelevisionhairdryervideoplayerfridgecomputerwashingmachinestoveWindenergyisusedaspowertoproduceelectricity.Windmillswhereelectricityisproduc
4、edbyburningcoals.Thecoalpowerstationsinwhichoilisrefinedandmadepure.TheOilRefineriesafacilitydesignedtoconvertnuclearenergyintoelectricity.Anuclearpowerplantontheroofofahouseonabrightsunnydayareusedtocollectsolarenergy,makingyourhousewarmorheatingyou
5、rwater.Solarpanelsareusedtokeepbackwaterandraiseitslevelforirrigationorforproducingelectricity,etc.TheHydro-electricdamsAnenergysourceis“renewable”whensuppliesofitneverrunoutand“non-renewable”whenonedaytheywillrunout.Whichenergysourcesonyourlistarere
6、newableandwhicharenon-renewable?DiscussionCoalOilNaturalgasUranium[化]铀(nuclearenergy)FossilfuelsNon-renewableWind(windpower)Sun(solarenergy)Water(hydro-electricpower)Plantwaste植物性废物(biomassenergy生物团能量)Hotspringsorgeysers间歇泉(geothermalenergy)Thesea(ti
7、dalenergy潮汐能)RenewableWhatarefossilfuels?FossilfuelsareAncientanimalandplantmaterialbelowthesurfaceoftheearthwithahighcarboncontent,suchascoal,oilandnaturalgas,whichcanbeburnttoproduceenergy.Theyarealsoknownasnon-renewableenergybecauseoncetheyareruno
8、utof/runout,theycannotberenewed.Whatarethesebuildingsmadeofandwhatistheirpurpose?Theyaremadeofglassandplantscangrowinitwhenitiscoldoutside.Howdoesitwork?Theglasstrapstheheatfromthesun,makingtheairwarmsothatplantscangrowbetter.Greenhousegases!What’sgr
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