【公开课课件】北师版英语选修八Unit-22-Lesson-1Global-Warming

Unit22EnvironmentalProtectionLesson1GlobalWarming

•Masterthekeywordsandexpressions•Knowwhattheglobalwarmingis•Tellofthecausesandeffectsoftheglobalwarming•Summarizethetextthroughlistening•BeawareoftheresponsibilitytohelpslowdownglobalwarmingObjectivespolarmeltingskinnypolarbearShrinkingoceanwildnessflooding

droughtPovertynaturaldisastersvolcaniceruptionsEarthquakes1.Whatisit?2.What’stheimpactofit?3.Whathascausedit?4.Whatcanwedotoslowitdown?Howmuchdoyouknowabout

globalwarming?II.Matchthemeaningsoffollowingwords.consensusbounceagriculturecoincidence2p6

aremarkableconcurrenceofeventsbychance

thescienceorpracticeoffarmingmovequicklyup,back,orawayfromasurfaceafterhitting

ageneralagreementcondemnreservationsacrificeadvocate

togiveaparticularpunishment,especiallydeath

togiveup(somethingimportantorvalued)becauseofotherconsiderations

torecommendorsupportpubliclytheactionofreservingsomethingforgeneralideasSkimming

Matchtheheadings.

Para.1Para.2Para.3Para.4Para.5WhatcausesglobalwarmingWhatisglobalwarmingTheintroductionofthetopicSolutionResultsofglobalwarming

forspecificinformationScanning1)WhichofthefollowingisTRUEaboutgreenhousegases?A.Greenhousegaseswillonlydousharm.B.Greenhousegasesdomoreharmthangoodtohumans.C.Greenhousegasesdomoregoodthanharmtohumans.D.Propergreenhousegasesarequitenecessarytotheearth.2)WhichofthefollowingisNOTmentionedastheresultofglobalwarming?A.Typhoons.B.Seriousdiseases.C.Polaricemelting.D.Heatwaves.I.Choosethebestanswer.III.Answerthesequestions.3p71.Whatisglobalwarming?2.Whathumanactivitiesarecausingglobalwarming?3.Byhowmuchhastheglobalaveragetemperatureincreasedinthelast100years?4.AregreenhousegasesnecessaryforlifeonEarth?5.Howcanwehelpsolvetheproblemofglobalwarming?1.Whatisglobalwarming?

2.Whathumanactivitiesarecausingglobalwarming?GlobalwarmingisanaverageincreaseintheEarth’stemperaturethatleadstoclimatechange.Industry,agriculture,thecuttingdownofforests,theincreaseintransportandtheburningoffuelsarecausingglobalwarming.3.Byhowmuchhastheglobalaveragetemperatureincreasedinthelast100years?4.AregreenhousegasesnecessaryforlifeonEarth?By1ºF(OnedegreeFahrenheit)Yes,theyare.BecausetheytrapheatfromthesunintheEarth’satmosphere.OtherwisetheEarthwouldbecoldandunsuitableforlife.5.Howcanwehelpsolvetheproblemofglobalwarming?Wecanmakesmallchangesliketakingpublictransport,recycling,usinglow-flowshowerheads,buyinglightbulbsthatuselessenergy,usingrecycledpaper,andswitchingoffthelightswhenweleavearoom.6.Whatarethewould-beconsequencesofglobalwarming?

Itwillcausemorefrequentflooding,heatwavesanddroughts.Seriousdiseaseswillspreadandindustriesthatrelyonnaturesuchasfishingwillbebadlyaffected.Itwillalsocausethepolaricetomelt,raisingsealevels,andfloodingmanyislandsandcities.ListeningGlobalwarmingreferstoanaverage

increaseintheEarth’stemperaturethat,

(1)________,leadstoclimatechange.Inthelast50years,gases(2)____________theEarth’satmosphere

bythefactoriesandvehicleshavebeen(3)____________theprocessofglobalwarming.Manyexperts(4)____________fortheglobalwarming___humanactivities,suchasincreasedindustry,agriculture,thecutting

downGlobalWarminginturnspeedinguppintheblameonpumpedintoFillintheblanksandtrytoretell.offorests,theincreaseintransportandtheburningoffuels.Globalwarmingwill(5)_____terribleclimatechangesincludingfrequentflooding,heatwavesand

droughts.Increasedtemperaturewillalsocausethepolaricetomelt,(6)_______

sealevelsandfloodingmanyislandsandcities.

Howcanwehelpsolvetheproblemofglobalwarming?Governmentsallovertheworld(7)________________reducingtheamountofcarbondioxidewhichtheircountriesareproducing.Expertssuggestraisingareresponsibleforcausethateachperson(8)______theirpartbymakingsmallchangesliketaking

publictransport,recycling,usinglow-flow

showerheads,etc.Ifallthesesmallchangesare(9)__________,therecouldbebigchangesthat(10)______

ourfuture.playaddedupsaveWhatcanwedo?publictransportlow-flowshowerheadenergy-savinglightbulbsrecycledpaperswitchoff…DiscussionWhatwillyoudotohelpreducegreenhousegasesinyourdailylife?

Onreducinggreenhousegases,aperson’sactionisnotenough.Howeverwhenthatactionisunitedbythe1.4billionpeopleinChinaorthe7billionpeopleworldwide,thesavingsaresignificant.Homework•