英語(yǔ)選修6-Unit4-Global-warming-Warming-upReading課件新

WordsstudyGlobalwarmingUnit4第1頁(yè)Whatisglobalwarming?Theearthisbecomingwarmer.第2頁(yè)2.Whatcausestheglobalwarming?Humanactivity—burningoffossilfuelsGreenhouseeffect—greenhousegasesHugequantitiesofextracarbondioxideOtherreasons?第3頁(yè)Thingsthatuseenergyaroundusoratanyotherplaces:Inahouse第4頁(yè)lights,heating,computer,hairdryer,cassetteplayer,videorecorder,CDplayer,Mp3/Mp4,television,fridge,Stovewashingmachine,aircondition,micro-waveovenwaterheater,inductioncookervideo-phone盒式錄音機(jī)空調(diào)微波爐電磁爐電視電話第5頁(yè)wheredoesalltheenergycomefrom?energysources第6頁(yè)Windenergyisusedaspowertoproduceelectricity.

Windmills第7頁(yè)whereelectricityisproducedbyburningcoals.Thecoalpowerstations第8頁(yè)afacilitydesignedtoconvertnuclearenergyintoelectricity.

Anuclearpowerplant第9頁(yè)What’sthedifferencebetweenwindpowerandcoalpower?Windwillneverrunoutwhilecoalisalimitedsource.Whatisrenewableenergyandwhatisnon-renewableenergy?第10頁(yè)

CoalOilNaturalgasUraniumWind(windpower)Sun(solarenergy)Water(hydro-electricpower)Plantwaste(biomassenergy)Hotspringsorgeysers(geothermalenergy)Thesea(tidalenergy)FossilfuelsNon-renewableRenewable第11頁(yè)P(yáng)re-readingWhatisitinthepicture?It’sagreenhousemadeofglass.Whatisitusedfor?It’susedforgrowingplants,especiallyduringcoldweather.Howdoesitwork?Theairinsideiswarmbecausetheglasstrapstheheatfromthesunandkeepsitfromescaping.Thismakesthegreenhouseheatupandsotheplantscangrowthroughoutthecoldperiod.第12頁(yè)Greenhouseeffect第13頁(yè)Skimming1.Whowrotethemagazinearticle?2.Whatisthenameofthemagazine?3.Whatarethenamesofthethreescientistsmentionedinthearticle?TheEarthIsBecomingWarmer–ButDoesItMatter?第14頁(yè)SkimmingLet’scheckit:Whowrotethearticle?Whatisthenameofthemagazine?Whatarethenamesofthe3scientists?SophieArmstrongEarthCareDrJaniceFoster,CharlesKeeling,GeorgeHambley第15頁(yè)Trueorfalse?(P27)ReadingComprehension21.Thetemperatureinthelastcenturydidn’tseemtoincreasemuch.2.Everyonebelievesthatglobalwarmingiscausedbytheactivitiesofhumans.3.JaniceFosterbelievesshecanmeasurethefutureglobalriseintemperature.4.Theriseincarbondioxideiscausingasteadyincreaseinglobalwarming.5.GeorgeHambleybelievesthatglobalwarmingwilldogoodratherthanharmtotheearth.6.Itisclearwhattheeffectsofglobalwarmingwillbe.第16頁(yè)whichscientist’sopiniondoyouagreewith?Listthepositiveornegativeeffectsofglobalwarming.Discussion第17頁(yè)causethesealeveltoriseseverestormsdroughtsfaminesthespreadofdiseasesdisappearanceofspecies