global-warming-高中英语-课件

Unit4

GlobalwarmingByYuanZhaofromGangchengNo.14middleschoolContentsStepⅠ:What’sglobalwarmingStepⅡ:ThecausesofGWStepⅢ:TheconsequenceofGWStepⅣ:EarthHourstepⅤ:ExercisesfortodayStepⅠ:What’sglobalwarming?Haveyounoticedthatit'sgettingwarmerandwarmereveryyear?Toputitsimplythat'sbecauseofairpollution.Scientiststellusthat’sbecauseofairpollution,theearth'sheatcannotescape.Thisisknownasglobalwarming.Ifthissituationisallowedtocontinue,itwilljustkeepgettinghotterandhotter.Then,canyouimaginewhatwillhappen?Conclusion:

Weshouldall,therefore,doourparttostoppollutingtheairandhelpsavetheworld.StepⅡ:AdialogueActthedialogueinpairs,learnsomenewsabouttheGlobalwarming.Tellthestatementtrueornot.Makeajudgment＊AlargequantityoficeintheAntarctictomelt

causes

theglobalwarming.

(Alargequantityof=alargeamountof)(F)Correct:

Theglobalwarmingcausestheicetomelt.ResultfromLead

toResultinThereason(Cause)Theresult(consequence)causeLet’sdoit!Pleasemakeasentenceof“resultin”,andthenletyourpartnerrewritethesentenceusing“resultfrom”.resultin

←isoppositeto→

resultfromStepⅢ:Howdoesglobalwarmingcomeabout?Let’slearnabackgroundofglobalwarming.Therearemanyreasonswhyithappens.First,pleaselookatsomepictures.

“Comeabout”

isequalto

“happen”here.EmissionfromburningfossilfuelsdroughtwildfiresThemeltingofglaciersDoitbyyourself!＊Makeanoutlineofthecausesbyyourselfonthebackofthissheetofreading.＊Pleasefindoutallthesesentencesincluding“methane”.Andanswer:what’sthemethane?＊Findoutthephrase“contributeto”,andreplaceitusinganotheroneorotherones.StepⅣ:The

consequencesofglobalwarmingReaditandfillinthechart.Andthendoaexerciseofmatchingtheseitemswithpictures.TheconsequencesofglobalwarmingLeadtodroughts,wildfires,heavierrainfallandtsunami.Resultinheat-relateddeathsResultinlossofsomespecies.HightemperatureWeatherpatternhealth

wildlifeglacierContributetothemeltingPleasematchtheeffectsofglobalwarmingwiththerightpicturesbelow:A.Glaciersmelting冰川融化B.SpreadingdiseaseC.PlantandanimalrangeshiftsandpopulationchangesD.DroughtsandfiresE.Arctic(北极圈)andAntarctic(南极圈)warmingF.EarlierspringarrivalG.HeatwavesandperiodsofunusuallywarmweatherH.Oceanwarming,sea-levelriseandcoastalfloodingI.Downpours,heavysnowfalls,andfloodingJ.Coralreef(珊瑚礁)bleaching(漂白,白化)

KeypointsEffect←isoppositeto→

cause↑

issimilarto

↓Consequence/resultopposite→opposeto/against→beopposedto

adj./adv./prep./n.Verb.adj.StepⅤ:Howtosolvethisproblem?Whatwouldyoudotoprotectourplanetagainstglobalwarming?HaveyouheardaboutEarthHour?Let’swatchashortvideotoseethepeopleintheworldhowtofightagainstit.GlobalwarmingcauseConsequenceSolution