选修六Unit 4 Global Warming-reading.pptx

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1、Unit4GlobalWarmingLightourcitiesHeatourbuildings---1.Whatdoweuseenergyfor?Manythingsconsumeenergyinourdailylife.2.Wheredoesallthisenergycomefrom?Windpoweracoalpowerstationanoilrefineryanuclearpowerplant炼油厂solarpanelshydro-electricdamRenewablenon-renewable:

2、energysourcessuppliesofitneverrunoutonedaytheywillrunout.Renewableornon-renewable?√Renewableornon-renewable?√CoalOilNaturalgasUraniumWind(windpower)Sun(solarenergy)Water(hydro-electricpower)Plantwaste(biomassenergy)Hotspringsorgeysers(geothermalenergy)Thesea(

3、tidalenergy)FossilfuelsNon-renewableRenewable化石燃料3.Whatarefossilfuels?Ancientanimalandplantmaterialbelowthesurfaceoftheearthwithahighcarboncontent,suchascoal,oilandnaturalgas,whichcanbeburnttoproduceenergy.Alsoknownasnon-renewableenergybecauseoncetheyareusedt

4、heyhavegoneforever;theycannotberenewed.4.Whatisthegreenhousemadeandusedfor?Agreenhouseismadeofglassandisusedforgrowingplants,especiallyduringcoldweather.5.Howdoesitwork?Theairinsideiswarmbecausetheglasstrapstheheatfromthesunandkeepsitfromescaping.Thismakesthe

5、greenhouseheatupandsotheplantscangrowthroughoutthecoldperiod.6.Whatarethe“greenhousegases”?Intheatmospheresurroundingtheearththerearegases,whicharecalled“greenhousegases”,includingcarbondioxide,methane(甲烷,沼气)andwatervapor.7.Whatdoyouthinkgreenhousegasesdo?The

6、ytrapheatfromthesunandthereforewarmtheearth.TheEarthIsBecomingWarmer–ButDoesItMatter?Lookatthemagazinetitlequicklyandtrytofindout:howisthetextorganized?Ithasatitle;afirstparagraphthatisinbold;themaintext;Diagram(graph);somequotes.FastReadingReadthetextfastand

7、answerthequestionsonpage27Ex1Whowrotethemagazinearticle?Whatisthenameofthemagazine?SophieArmstrongwrotethemagazinearticle.ThenameofthemagazineisEarthCare.Whatarethenamesofthethreescientistsmentionedinthearticle?TheyareDr.JaniceFoster,CharlesKeelingandGeorgeHa

8、mbley.3.Whatdotheythinkaboutglobalwarming?Dotheyagreewithoneanother?Theydon'tagreewitheachother.Dr.JaniceFosterthinkstheeffectsofglobalwarmingcouldbeveryserious.GeorgeHambleythinksglobalw