北师大版Unit22.Lesson1Global-Warming阅读课件说课材料

Lesson1GlobalWarming第一页，共27页。Environmentalproblems?airpollutionglobalwarmingendangeredanimalswaterpollutionsoilpollutionsandstormforestation

noisepollutiondesertificationwarm-up第二页，共27页。/b/108435/3369510.htmlQuestion:Whatdoyouknowaboutglobalwarming?Brainstorming第三页，共27页。RaisingtheEarth’stemperaturewillcausesubstantialmeltingofthepolaricecapswhichwillthenleadtoariseinthesealevel

andsubsequentfloodingoflow-lyingareas.第四页，共27页。Globalwarmingwillalsochangecountries’climatesandcausehugefoodandwatershortages.第五页，共27页。Mostenvironmentalistsagreethatglobalwarmingisanunnaturalphenomenoncausedbytheemissionsfromburningcarbonfuelssuchascoal,oilandpetrol;theycallthisthe“greenhouseeffect”.第六页，共27页。Therehavebeenseveralsummitsofgovernmentstodiscussthisproblembutmanycountriesdon’twanttomakechangestotheirfactoriesandindustrialworksasthiswouldcostthemmoney.第七页，共27页。Whichcountriesdoyouthinkcontributemoretoglobalwarming?a)developedcountriesb)developingcountriesDevelopedcountries–moreindustryandtechnology.第八页，共27页。PartIIPre-readingCanwetaketheheat?第九页，共27页。Guessing:

Basedonthetitleandthefollowingpictures,canyouguesswhat’sthemeaningoftheword“take”?

Pre-reading第十页，共27页。Question:Whatisglobalwarming?GlobalwarmingmeansanaverageincreaseintheEarth’stemperaturewhichleadstoclimatechange.While-reading:Skimming第十一页，共27页。Readthetextandfindmainideaofeachparagraph.A.Drawreaders’attentiontothetopicbyaskingquestions.B.Whatshouldhumanbeingsdo.C.Whatisglobalwarming.D.Consequencesofglobalwarming.E.WhatcauseglobalwarmingPara1.Para2.Para3.Para4.Para5.While-reading:Skimming第十二页，共27页。consensus,bounce,agriculture,coincidence,condemn,reservation,sacrifice,advocateScanthetextbelowforthesewordsandworkouttheirmeanings.Scanning:第十三页，共27页。Scanthetextbelowforthesewordsandworkouttheirmeanings.consensusbounceagriculturecoincidencearemarkableconcurrenceofeventsbychancemovequicklyup,back,orawayfromasurfaceafterhittingageneralagreementthescienceorpracticeoffarming第十四页，共27页。condemnreservationsacrificeadvocatetheactionofreservingsomethingtorecommendorsupportpubliclytogiveup(somethingimportantorvalued)becauseofotherconsiderationssentencetoaparticularpunishment,especiallydeath第十五页，共27页。1.Whathumanactivitiesarecausingglobalwarming?2.Byhowmuchhastheglobalaveragetemperatureincreasedinthelast100years?3.AregreenhousegasesnecessaryforlifeonEarth?4.Howcanwehelpsolvetheproblemofglobalwarming?Readthetextandanswerthequestions.第十六页，共27页。1)Whathumanactivitiesarecausingglobalwarming?Industry,agriculture,thecuttingdownofforests,theincreaseintransportandtheburningoffuelsarecausingglobalwarming.2)Byhowmuchhastheglobalaveragetemperatureincreasedinthelast10years?By1°F(onedegreeFahrenheit).第十七页，共27页。3)AregreenhousegasesnecessaryforlifeonEarth?Yes,theyare,becausetheytrapheatfromthesunintheEarth’satmosphere.OtherwisetheEarthwouldbecoldandunsuitableforlife.4)Howcanwehelpsolvetheproblemofglobalwarming?Wecanmakesmallchangesliketakingpublictransport,recycling,usinglow-flowshowerheads,andbuyingenergy-efficientlightbulbstohelpstopglobalwarming.第十八页，共27页。Postreading:GroupworkVoiceyouropinions:Whatwillyoudoeverydaytohelpreducegreenhousegases?第十九页，共27页。takepublictransportlikebuses，trainsandsubwaysExamples

第二十页，共27页。Therecyclingsymbol

buytherecycledproducts第二十一页，共27页。uselow-flowshowerheadsbuyenergy-efficientlightbulbs第二十二页，共27页。Postreading:GroupworkVoiceyouropinions:Whatwillyoudoeverydaytohelpreducegreenhousegases?第二十三页，共27页。Post-reading:vocabularyUsetheexpressionsintheboxinthecorrectformtocompletethesentences.1Waterwas

thefishpondfromtheriver.2Weallneedto

tofinishintime!pumpedintospeedupbeyondourcontrol,pumpinto,asaresultof,inlargequantities,referto,speedup第二十四页，共27页。3.Thereisnothingmorewecando.thesituationisnow

.4.

theaccident,sheisnowafraidofwater.5.Thescientist

globalwarmingatleastthreetimesinhisspeech.6.Thefactorywasproducinggreenhousegases_________________.beyondourcontrolAsaresultofreferredto