搜索
Unit4GlobalwarmingWarmingup&ListeningTeachinggoalsEnablethestudentstoknowsomethingaboutenergyresourcesandsomethingthatuseenergy,andlistenfordetailsandcatchthespecificinformationasmuchaspossible.LearningabilitygoalsEnablethestudentstopredictsomeimportantinformationintheprocessoflisteningandencouragethestudentstotalkaboutthesituationsaccordingtothelisteningmaterials.TeachingimportantanddifficultpointsHowtomakesuretheanswersoflisteningmaterial.TeachingaidsArecorderandcassettetapes,aprojector,andacomputerTeachingproceduresStep1WarmingupDoyouknowanykindofenergyresource?Doyouknowanythingthatuseenergy?thingsthatuseenergyinahouse(Slideshow:somepicturesofthingsthatuseenergyinahouse.)ThingsthatuseenergySourcesofenergylightstelevisioncassetteplayercomputerfridgestovewashingmachinehairdryervideorecordercoaloilnaturalgaswind(power)sun(solarenergy)water(hydro-electricpower)thesea(tidalenergy)uranium(nuclearenergy)plantwaster(biomassenergy)T:Nowlet’slookatsomemorepicturesanddecidewhethertheyarerenewableornot.(Slideshow:picturesofsomeformsofenergy)windenergyrenewablesolarenergyrenewablehydroelectricpowerrenewablegeothermalenergyrenewabletidalenergyrenewablebiomassenergyrenewablenuclearpowerplant,non-renewable(picture)anoilrefinery(精炼厂),non-renewable(picture)coalpowerstation,non-renewable(picture)naturalgasnon-renewable(picture)uraniumOre(铀矿石)non-renewable(picture)Theelementuraniumdoesnotoccurinpureforminnaturebutisfoundinmineralssuchascarnotite（钒钾铀矿）,picturedabove.(picture)Conclusionnon-renewablecoaloilnaturalgasUraniumfossilfuelsrenewablewind(windpower)sun(solarenergy)water(hydro-electricpower)plantwaste(biomassenergy)hotspringsorgeysers(geothermalenergy)thesea(tidalenergy)SlideshowWhatarefossilfuels?Ancientanimalandplantmaterialbelowthesurfaceoftheearthwithahighcarboncontent,suchascoal,oilandnaturalgas,whichcanbeburnttoproduceenergy.Alsoknownasnon-renewableenergybecauseoncetheyareusedtheyhavegoneforever;theycannotberenewed.Step2Pre-listeningReadExercise1together:1.Readthestatementsbelowandticktheonesyouagreewith.2.ListentothetapeandansweranddecidewhichstatementProfessorChendoesNOTagreewith.1.We'llhavetostopusingfossilfuels.2.About90%oftheworld'senergycomesfromfossilfuels.3.Wecanreplacefossilfuelswithrenewablesourcesofenergy.4.Nuclearpowerisagoodsourceofenergy.5.Inthefuture,we'llneednewtechnologiestoreplacefossilfuels.6.It'sthedevelopedcountrieswhoaretoblameforproducingmostofthecarbondioxide.3.ListenagainandtickthephrasesthatProfessorChenusestoagreeordisagreewithLiBin.SlideshowExactly.I’mafraidIdisagreewithyou.That’strue.I’mafraidnot.That’sright.Idon’tthinkso.That’scorrect.Noway.Iagree.Idon’tagree.4.Listenforthethirdtimeandfillintheblanks.1．Ourmodern_________societiesdependontheenergywegetfrom_________.2．It’savery____________andcheapformofenergy.3．Can’twejust________fossilfuelswith________sourcesofenergylikesunorwindpower?4．However,whateverwedo,wehavetodoitasa________________.5．The_________countriesarereallytheonesto______.Keys:1．industrial;fossilfuels2.concentrated3。replace；renewable4。globalcommunity5．developed；blameStep3Homework1.Reviewthenewwordsandexpressionsyoulearnedinthisclass.2.PreviewReading.