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Unit4Globalwarming教学目标TeachingAims1.Enablethestudentstolearnthefollowingusefulnewwordsandexpressions：fossilfuel,go

up,comeabout,flood,drought,famineetc.bypictures.2.Enablestudentstomasterthereadingskillsbyskimming,scanning.3.Enables

tudentstogettheknowledgeofglobalwarmingthroughthereadingstrategiesandskills.情感态度Emotion,attitudeandvalueEnablethestudentstobemore

awareoftheimportanceofstoppingglobalwarming重点难点TeachingImportantandDifficultPointsEnablethestudentstogetinformationaboutglobalwarmingusingtherea

dingstrategiesandskills.教学方法TeachingMethodsAsking-and-answeringactivitytocheckthestudents’understandingofthetext；individual，p

airorgroupworktofinisheachtask.5教学过程TeachingProceduresStep1.Lead-in1)Greetingsandleadin.ShowafilmofTheDayAfterTomor

rowandaskthemthefollowingquestion:Whatcanyouseeinthefilm?--hurricane,tsunami,glaciermelting.Whatotherdisastersdoyouknow？--Flood,dro

ught,famine.Whatcausesthedisasters?--It’stheglobalwarming.Whatcausesthetheglobalwarming?--Picture1:theburningoffossilfuelsPicture2:greenhousegas

es:carbondioxide,watervapor,methaneAsaresult,theearthwillbecomewarmerandwarmer.Step2.Skimming:Glancethefirstparagraph:1.Whowrotethemagazinearti

cle?A.JaniceFosterB.SophieArmstrong2.Whatisthetopicofthearticle?A.TheearthB.Globalwarming3.TherearethenamesofthethreescientistsinthearticleEXCEPT

______.A.DrJaniceFosterB.SophieArmstrongC.CharlesKeelingD.GeorgeHambleyStep3.Scanningfordetailedinformation(Groupwork)Part2(2-5

)1.Whatdothetwographsshow?--ThefirstgraphshowsthetemperatureincreaseofonedegreeFahrenheitbetween1860to2000.--Thesec

ondgraphshowscarbondioxidewentupfrom1957to19972.Whatdoyouknowaboutgreenhouseeffect?Greenhousegasestrap(吸收)theheatfromthesunandthereforewa

rmtheearth.3.WhichfollowingisNOTTRUEaboutglobalwarming?(D)A.Theincreaseoftemperatureisdueoftheburningofthefossilfuels.B.Theburn

ingofthefossilfuelscausedtheincreaseincarbondioxide.C.Allbelievesthatactivitiesofhumanshavecausedglobalwarming.D.Theattit

udesofscientiststowarditarethesame.ThedifferentideasoftheeffectsoftheglobalwarmingPart3(6)Step4.SummaryWhatcanwelearnfromthetext?Fillinthebland.

A.fossilfuelsB.humanactivityC.warmerD.differentE.heatEveryonebelievesthattheearthisbecoming______._______________hascaused

thisglobalwarming:humanproduceDr.FosterHambleyMorecarbondioxidehasnegativeeffects:riseofthesealevelseverestorms,droughts,floods,famines,thesprea

dofdiseases,thedisappearanceofspecies.Morecarbondioxideisa_positive_thing,makescrops__produce__moreandwillencourage__agreatr

angeofanimals____.energybyburning___________.Duringthisprocess,greenhousegasesareproduced.Greenhousegases

cantrap_____fromthesunandwarmtheearthwhichiscalled“greenhouseeffect”.Theattitudesofscientiststowardsglobalwarmingare______.Ontheonehand,

itisapositivething.Ontheotherhand,iftherearetoomanygreenhousegases,moreheatwillbetrapped,causingglobalwarming.Step5.After-r

eadinggroupworkWhatshouldwedotostopglobalwarming?Discussion:Suggestionsonglobalwarming:turnofftheelectricalappliancetalkwithfamilyandfrie

ndsaboutitrecyclethingslikebottles,plasticsplantmoretreesridebikeratherthancarwords参考词汇:reduce,carbondioxide,absorb,environment,plant,ele

ctricalappliances,recycleSentencesstructures句型:Weshould...inorderto...moItisagoodideato...becauseitcan...e.g.Weshouldplantmoret

reesinordertoabsorbthecarbondioxide.Itisagoodideatoplantmoretreesbecauseitcanabsorbthecarbondioxide.Suggestionsaboutglobalwarmin

gNowadays,globalwarmingisbecomingwarmerandwarmer.It'stimeforustotakesomeactionstodealwithit.Firstly,weshould______________________

__________________inorderto_______________________________________.Secondly,it'sagoodideato_______________________________________because_

______________________________________.Finally,whynot______________________because________________________.Letussaveenergyandstoptheglobalwarmin

gtogether.Step6.HomeworkWriteashortpassageaboutthesuggestions.