高二英语选修6第四单元ppt课件.ppt

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1、Unit4GlobalWarmingPeriod1&2WarmingupandReadingIWorkingroups---listthingsasrequired:1.Thingsthatuseenergyaroundusoratanyotherplaces,(ie.light)2.Sourcesofenergy(ie.coal)Warmingup–I(３m)ThingsthatuseenergySourcesofenergylightstelevisioncomputerfridgestovewashingmachinehairdr

2、yercoaloilnaturalgaswind(power)sun(solarenergy)water(hydro-electricpower)thesea(tidalenergy)Uranium铀(nuclearenergy)plantwaster(biomassenergy)Windmills,renewable.What?Renewable?Warmingup–II(5m)What?Whatkind?Renewable?Acoalpowerstation,non-renewable.What?Whatkind?Renewable

3、?Anoilrefinery(精炼厂),non-renewable.What?Whatkind?Renewable?Anuclearpowerplant,non-renewable.What?Whatkind?Renewable?Ahydro-electricdam,renewable.CoalOilNaturalgasUraniumWind(windpower)Sun(solarenergy)Water(hydro-electricpower)Plantwaste(biomassenergy)Hotspringsorgeysers(g

4、eothermalenergy)Thesea(tidalenergy)FossilfuelsNon-renewableRenewableWhatarefossilfuels?Ancientanimalandplantmaterialbelowthesurfaceoftheearthwithahighcarboncontent,suchascoal,oilandnaturalgas,whichcanbeburnttoproduceenergy.Alsoknownasnon-renewableenergybecauseoncetheyare

5、usedtheyhavegoneforever;theycannotberenewed.Theearthisbecomingwarmer—butdoesitmatter?ReadingReadthepassageagaintofindouttheanswerstothequestionsinEx.1ReadingI–scanning(5m)1.Whowrotethemagazinearticle?Whatisthenameofthemagazine?2.Whatarethenamesofthethreescientistsmention

6、edinthearticle?SophieArmstrong.EarthCare.DrJaniceFoster,ChrlesKeeling,GeorgeHambley.3.Whatdotheythinkaboutglobalwarming?Dotheyagreewithoneanother?Therearesomeverydifferentattitudesamongscientiststowardsthisissue.Somethinktheeffectswillbeterrible,whilesomeothersbelievetha

7、tweshouldnotworryaboutit.4.Whatarethetwographsabout?5.Whatisthemaintopicofthearticle?ThefirstgraphshowsthetemperatureincreaseofonedegreeFahrenheitbetween1860to2000.Thesecondgraphshowsthecarbondioxidecontentintheatmospherefrom1957to1997.Globalwarming/thewarmingoftheearth.

8、Readthepassagecarefullyandjudgewhetherthestatementsaretrueorfalse?Thetemperatureinthelastcenturydidnots