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ID:62293303
大小:3.98 MB
页数:123页
时间:2021-04-25
《课件-人教版选修6-unit4-global-warming.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、Unit4GlobalWarmingSavetheearth!Period1&2WarmingupandReadingIWorkingroups---listthingsasrequired:1.Thingsthatuseenergyaroundusoratanyotherplaces,(ie.light)2.Sourcesofenergy(ie.coal)Warmingup–I(3m)Thingsthatuseenergyaroundusoratanyotherplaces:InahouseThingsthatuseenergySourcesofenergylightstelevision
2、cassetteplayercomputerfridgestovewashingmachinehairdryervideorecordercoaloilnaturalgaswind(power)sun(solarenergy)water(hydro-electricpower)thesea(tidalenergy)uranium(nuclearenergy)plantwaster(biomassenergy)Windmills,renewable.What?Renewable?Warmingup–II(5m)What?Whatkind?Renewable?Acoalpowerstation,
3、non-renewable.What?Whatkind?Renewable?Anoilrefinery(精炼厂),non-renewable.What?Whatkind?Renewable?Anuclearpowerplant,non-renewable.What?Whatkind?Renewable?Ahydro-electricdam,renewable.Geothermal(地热的)EnergyPlantCoalOilNaturalgasUraniumWind(windpower)Sun(solarenergy)Water(hydro-electricpower)Plantwaste(
4、biomassenergy)Hotspringsorgeysers(geothermalenergy)Thesea(tidalenergy)FossilfuelsNon-renewableRenewableWhatarefossilfuels?Ancientanimalandplantmaterialbelowthesurfaceoftheearthwithahighcarboncontent,suchascoal,oilandnaturalgas,whichcanbeburnttoproduceenergy.Alsoknownasnon-renewableenergybecauseonce
5、theyareusedtheyhavegoneforever;theycannotberenewed.Whatabouttheweather?9℃/14℃Weneed…Pre-reading(3m)Thesun.Howabouttheplants?Iflackofsolarenergy,theplants…GreenhouseGreenhousegases!Whataregreenhousegases?What’sgreenhouseeffect?Let’sseethefollowingpictureaboutit.GlobalWarmingReadingReadthepassageagai
6、ntofindouttheanswerstothequestionsinEx.1ReadingI–scanning(5m)1.Whowrotethemagazinearticle?Whatisthenameofthemagazine?2.Whatarethenamesofthethreescientistsmentionedinthearticle?→SophieArmstrong,EarthCare.→DrJaniceFoster,CharlesKeeling,GeorgeHambley.→Therearesomeverydifferentattitudesamongscientistst
7、owardsthisissue.Somethinktheeffectswillbeterrible,whilesomeothersbelievethatweshouldnotworryaboutit.3.Whatdotheythinkaboutglobalwarming?Dotheyagreewithoneanother?→Thefirstgraphshowsthetemperatureincreaseofo
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