课件-人教版选修6-unit4-global-warming

Unit4GlobalWarmingSavetheearth!Workingroups---listthingsasrequired:1.Thingsthatuseenergyaroundusoratanyotherplaces,(ie.light)2.Sourcesofenergy(ie.coal)Warmingup–I(３m)Thingsthatuseenergyaroundusoratanyotherplaces:InahouseThingsthatuseenergySourcesofenergylightstelevisioncassetteplayercomputerfridgestovewashingmachinehairdryervideorecordercoaloilnaturalgaswind(power)sun(solarenergy)water(hydro-electricpower)thesea(tidalenergy)uranium(nuclearenergy)plantwaster(biomassenergy)Windmills,renewable.What?Renewable?Warmingup–II(5m)What?Whatkind?Renewable?Acoalpowerstation,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)EnergyPlant•Coal•Oil•Naturalgas•Uranium•Wind(windpower)•Sun(solarenergy)•Water(hydro-electricpower)•Plantwaste(biomassenergy)•Hotspringsorgeysers(geothermalenergy)•Thesea(tidalenergy)FossilfuelsNon-renewableRenewableWhatarefossilfuels?•Ancientanimalandplantmaterialbelowthesurfaceoftheearthwithahighcarboncontent,suchascoal,oilandnaturalgas,whichcanbeburnttoproduceenergy.Alsoknownasnon-renewableenergybecauseoncetheyareusedtheyhavegoneforever;theycannotberenewed.Whatabouttheweather?9℃/14℃Weneed…Pre-reading(3m)Thesun.Howabouttheplants?Iflackofsolarenergy,theplants…GreenhouseGreenhousegases!•Whataregreenhousegases?•What’sgreenhouseeffect?Let’sseethefollowingpictureaboutit.GlobalWarmingReadingReadthepassageagaintofindouttheanswerstothequestionsinEx.1ReadingI–scanning(5m)1.Whowrotethemagazinearticle?Whatisthenameofthemagazine?2.Whatarethenamesofthethreescientistsmentionedinthearticle?→SophieArmstrong,EarthCare.→DrJaniceFoster,CharlesKeeling,GeorgeHambley.→Therearesomeverydifferentattitudesamongscientiststowardsthisissue.Somethinktheeffectswillbeterrible,whilesomeothersbelievethatweshouldnotworryaboutit.3.Whatdotheythinkaboutglobalwarming?Dotheyagreewithoneanother?→ThefirstgraphshowsthetemperatureincreaseofonedegreeFahrenheitbetween1860to2000.Thesecondgraphshowsthecarbondioxidecontentintheatmospherefrom1957to1977.→Globalwarming/thewarmingoftheearth4.Whatarethetwographsabout?5.Whatisthemaintopicofthearticle?Readthepassagecarefullyandjudgewhetherthestatementsaretrueorfalse?1.Thetemperaturelastcenturydidn’tincreasemuch.2.Everyonebelievesthatglobalwarmingiscausedbytheactivitiesofhumans.3.JaniceFosterbelievesthatglobalwarmingiscausedbtheburningfossilfuels.4.Naturalgasisagreenhousegas.FFTFReadingII-skimming(5m)5.Carbondioxideisabyproductofburningfossilfuels.6.PeopleacceptCharlesKeeling’sdatabecausehetookaccuratemeasurements.7.Floodingcouldbeoneoftheeffectsoffutureglobalwarming.8.GeorgeHambleybelievesscientistsarejustguessingabouttheeffectsofglobalwarming.TTTT9.GeorgeHambleyisworriedabouttheeffectsofcarbondioxideonplantgrowth.10.Itisclearwhattheeffectsofglobalwarmingwillbe.FFHowmanypartscanthetextbedividedinto?Tips:Part1(para__)Part2(para___to___)Part3(para___to___)Part4(para___to___)12451011ReadingIII-detailedreading(8m)MainideasofeachpartWritingtechniquesPart1:introduce_________________________________________________Raising_________Part2:illustrate_______________________________giving____________using____________Part3:list_______________________________________giving__________,making________Part4:It’suptoreaderstothinkanddecide________________________________Using____________,leavingreaderstothinkovertheissueadebateovertheissueofglobalwarmingaquestionhowglobalwarmingcomesaboutexamples,graphs,explanationtwodifferentattitudesamongscientiststowardsglobalwarmingexamples,whetherpeopleshoulddosomethingaboutglobalwarmingornot.aquestioncontrastChoices.1.Whofoundouttheamountofcarbondioxideintheatmospherefrom1957to1977?A.Dr.JaniceFoster.B.CharlesKeeling.C.GeorgeHambley.D.SophieArmstrong.B〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓ReadingIV(3m)2.Buttherearesomeverydifferentattitudesamongscientiststowardsthisissue.“Issueheremeansthesameastheonein________.A.Iboughtthenewstampthedayofitsissue.B.Theyaretalkingaboutoneofthekeyissuesintheelectioncampaign.C.Thegovernmentisexpectedtoissueastatementabouttheelection.D.Themagazinehas12issueseachyear.B〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓3.Theauthorprobablyagreesthat________A.actuallyglobalwarmingisgoodforman.B.weshoulddonothingabouttheglobalwarming.C.catastropheswillhappeniftheglobekeepsonwarming.D.alotremainstobefoundoutabouttheeffectsofglobalwarming.D〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓ThedifferentideasbetweenDr.JaniceFoster&GeorgeHambleyDr.JaniceFosterGeorgeHambleyCarbondioxidehascausedtheglobaltemperatureto__________.Anincreaseoffivedegreeswouldbea____________andcouldbe______________.Morecarbondioxideisa__________thing,whichmakescrops__________andwillen-courage____________________.goupcatastropheVeryseriouspositiveproduceagreaterrangeofanimalsReadingV(4m)SummarySkimoverthepassage,andtellwhatyouhavelearntinclass.Trytotalkingeneraltermsratherthanindetails.eg:Ilearntthattheear