高中英語冀教版必修7Unit2Globalwarming

Unit2Globalwarming課時(shí)安排Warmingup&Pre-readingReadingandcomprehendingLearningaboutlanguageUsinglanguageLanguagepointsTeachinggoals:TolearnthecausesandtheeffectsofglobalwarmingTolearnaboutusefulwordsandexpressionsTograspthegrammar—howtouse“it”foremphasisinasentenceTolearnhowtoexpressagreementanddisagreement,blameandcomplaint.Tolearnhowtowritereportaboutsavingresourcesandprotectingtheenvironment.PeriodOne:Warmingup&Pre-readingWarming-upLeadinginbybrainstormPutthestudentsintogroupsoffouranddiscussthefollowingquestions:Whatdoweuseenergyfor?Whatarethesourcesofenergy?Whatsourcesarerenewableandwhatarenon-renewable?(differently)Lights,heating,andallkindsofelectricequipmentuseenergycoal,oil,solarpanels,nuclearenergy,naturalgas,windpower,water,plantwaste,tidalenergy,ect.coal;oil;solarpanels;nuclearenergy;naturalgas;windpower;water;plantwaste;tidalenergy,ect.fillinaform:SourcesofenergyPre-readinguranium(nuclearenergy)1.Weusemuchenergyinourdailylife,whatistheeffectwater(hydro-electricpower)plantwaste(biomassenergy)hotspringsorgeysers

Renewable/non-renewablenon-renewablerenewablerenewablerenewablethesea(tidalenergy)renewableofusingenergyinourworld?TheuseofenergyGiveoffcarbondioxide,otherwastedgasesandheatintotheairTheearthisbecomingwarmerandwarmer.(globalwarming)Greenhouseeffect2.Howdoesagreenhousework?Thegreenhousetrapstheheatfromthesunandkeepsitfromescaping,whichcanmakeitheatupandsotheplantscangrowthroughoutthecoldperiod.3.Underthisgreenhouseeffect,whathappens?Theearthisbecomingwarmerandwarmer.PeriodTwo:ReadingTopic:shortpassageaboutglobalwarming.LeadinginTostimulateSs’interestinreadingthetext.DividetheSsintogroupsoffour.Discussthefollowingquestions.1.Whatisglobalwarming?Theearthisbecomingwarmer2.Howhasthiscomeabout?Humanactivity—burningoffossilfuelsGreenhouseeffect—greenhousegases—weneedgasesHugequantitiesofextracarbondioxide

threeWhataretheeffectsofglobalwarming?ThesealeveltoriseSeverestorms,droughts,famines,thespreadofdiseases,andthedestructionofspecies.Task1:SkimmingAsktheSstohaveaquicklookatthemagazinearticle.Thenencouragethemtotellwhattheynoticeabouthowthetextisorganized.(Answer:Ithasatitle;afirstparagraphthatisinbold;themaintext;diagrams;twoquotes)Task2:ScanningToglanceatthetext,andanswerthefollowingquestions.1.Whowrotethemagazinearticle?Whatisthenameofthemagazine?SophieArmstrongwrotethemagazinearticle.ThenameofthemagazineisEarthCare.2.Whatarethenamesofthethreescientistsmentionedinthearticle?TheyareDr.JaniceFoster,CharlesKeelingandGeorgeHambley.Whatdotheythinkaboutglobalwarming?Dotheyagreewithoneanother?Theydon'tagreewitheachother.Dr.JaniceFosterthinkstheeffectsofglobalwarmingcouldbeveryserious.GeorgeHambleythinksglobalwarmingwillbemildwithfewbadenvironmentalconsequences.CharlesKeelingbelievesitistheburningofmoreandmorefossilfuelsthatisresultinginabigincreaseincarbondioxide.4.Whatarethetwographsabout?GraphIshowsthetemperatureincreaseofonedegreeFahrenheitbetween1860to2000.Graph2isaboutthecarbondioxidecontentintheatmosphere,1957--1997.Whatisthemaintopicofthearticle?Globalwarming/thewarmingoftheearth.Task3:IntensivereadingAskSstoreadthetextcarefullyandsumupthemainideaofeachpart.Partone(para1)Introduceadebateovertheissueofglobalwarming.Skills:RaisingaquestionParttwo(para2-3)Illustrate(explain)howglobalwarmingcomesabout.Skills:givingexamples,usinggraphs,explanationPartthree(para4-8)Listtwodifferentattitudesamongscientiststowardsglobalwarming.Skills:givingexamples,makingcontrast(comparison)Partfour(para9)It’suptoreaderstothinkanddecidewhetherpeopleshoulddosomethingaboutglobalwarmingornot.Skills:usingaquestion,leavingreaderstothinkovertheissue.Listentothetape.Afterit,togetSstofinishEx2onpage27.Theearthisbecomingwarmer,inyouropinion,doesitmatter?Ifitdoes,asastudent,whatcanyoudoaboutit?PeriodThree:UsinglanguageStepI:Reading“Whatcanwedoaboutglobalwarming.”Leadingin:Askstudentstotellwhatcancauseglobalwarming.Presenttheirideastothewholeclassingroups.Task1:Askstudentstoreadthetwolettersandtrytoanswerthefollowingquestions:1.WhatareOuyangGuang’stwoconcerns?Gettingsomesuggestionsforwhathecandoaboutglobalwarming.Asanindividual,hecanhavenoeffectonenvironmentalproblems.2.DoestheEarthCareagreewithOuyangGuang’sopinionthatindividualscanhavenoeffect?No.Task2:AskstudentstoreadthelettersagainandlistEarthCare’ssuggestions.Turnelectricalappliancesoffwhennotusingthem.Don’tturnuptheheat,putonmoreclothes.Walkorrideabike,don’tdrive.Recycle.Buythingsmadefromrecycledmaterials.Buyproductsthatuselessenergy.Planttrees.Talkwithfamilyandfriendsaboutglobalwarming.Task3:Askstudentstodiscussthesequestions:Inwhatwayswouldyoutalkwithyourfamilyandfriendsaboutglobalwarming?StepII:WritingCollectinformationaccordingtothestudents’discussion.Getthestudentstoorganizetheirideasintoseveralsentences.Thenshortenthesentencessotheybecomephrases.Askstudentstowriteaposterwithaneye-catchingheadingaccordingtotheexampleofhowtopresentaposter.Samplewritingforaposter:MainheadingAimFightglobalwarmingShowthestudentssomepostersCutdownonenergy,Waystocutsolvedowntheonproblems:carbondioxideStepIII:Listening1.Walkorrideabike.1.Languagepoints:(Reading)2.Recycle.2.1.Whatdoyouthinkgreenhousegasesdo?3.3.Planttrees.本句中think后接了一個(gè)由what指引的賓語從句。4.Buyenergy-savingproducts.但應(yīng)注意的是：特別賓語從句即當(dāng)一般疑問句主句的謂語動(dòng)詞是think,believe，suppose，consider,imagine，guess和suggest等時(shí)，表疑問的詞要放在主句前即句首。[正]Whodoyouthinkwillwininthegame?[誤]Doyouthinkwhowillwininthegame?自然一般狀況下賓語從句的疑問詞應(yīng)放在主句以后。[誤]Whydoyouknowwecan'tcutdownthebigtree?[正]Doyouknowwhywecan'tcutdownthebigtree?2.compareto/withComparedto/withmanywomen,pareAwithBIfyoucompareherworkwithhis,pareAtoBPoetshavecomparedsleeptodeath.3.Thereisnodoubtthat

.Thereissomedoubtwhether

.主句為一定句時(shí)，doubt后使用連詞whether。主句為否認(rèn)句時(shí)，doubt后則使用連詞that。eg:There'snodoubtthatonedayacurewillbefound.Thereislittledoubtthathewasthekiller.4.amountofanamountofanyamount(of)beoflittleamount

相當(dāng)數(shù)目的;一些任何數(shù)目(的);大批(的)不重要;無價(jià)值n.數(shù)目largeamountsofmoney大批的金錢eg:Theamountofmoneyshouldbewrittenbothinwordsandinfigures.錢數(shù)要用字和數(shù)碼寫出來。5.Withoutthe‘greenhouseeffect’，theearthwouldbeaboutthirty-threedegreesCelsiuscoolerthanitis.假如沒有溫室效應(yīng)，地球會(huì)比此刻冷33℃。這是一個(gè)委婉虛構(gòu)條件句。應(yīng)當(dāng)注意有時(shí)假定的狀況其實(shí)不以條件從句形式表示出來，而是經(jīng)過一個(gè)介詞短語或其余方式表示。常用的詞或短語有：without,butfor，butthat，otherwiseor，but等。eg:Withoutyourhelp(=Ifwehadnothadyourhelp)wecouldnothavesucceeded．

，，假如沒有你的幫助，我們是不會(huì)成功的。Butforelectricity

(=If

therewerenoelectricity)

，therewouldbenomodemindustry

．假如沒有電，就不會(huì)有現(xiàn)代工業(yè)。Hewashavingameetingwithhisstudents；otherwise,havecome.

hewould他當(dāng)時(shí)正與他的學(xué)生進(jìn)行議論，不然的話他就來幫我們了。Hefeltverytiredyesterday,orhewouldhaveattendedtheparty．他昨天很累,不然他就參加那個(gè)聚會(huì)了。6.resultin致使,造成=leadtoTheaccidentresultedinthreepeoplebeingkilled.這一事故致使他的死亡。Theaccidentresultedinhisdeath.resultfrom由產(chǎn)生，發(fā)生injuriesresultingfromafall.Theaccident______thedeathoftwopassengers.(B)A.resultedfromB.resultedinC.resultedofD.resultedwith7.ontheotherhand:另一方面ontheonehand,ontheotherhandI'dliketoeatout,butontheotherhandIshouldbetryingtosavemoney.Iwanttogototheparty,butontheotherhandIoughttobestudying.我想去參加聚會(huì)，但從另一方面來說，我應(yīng)當(dāng)留下來學(xué)習(xí)。concernn.有厲害關(guān)系；所關(guān)切的事It’snoconcernofmine.這事與我沒關(guān)。n.worry,anxiety擔(dān)憂；擔(dān)憂Sheshowedgreatconcernaboutyou.她很為你擔(dān)憂。v.tohavetodowithorrelatetoAttendtowhatconcernsyou.v.Tobeofinterestorimportanceto(

波及；與有關(guān)或有關(guān)注意與你有關(guān)的事物。常與with,about,in連用)

關(guān)懷；關(guān)照We’reratherconcerned

aboutfather

’shealth.我們相當(dāng)擔(dān)憂父親的健康。9.consequenceinconsequence所以asaconsequence結(jié)果asaconsequenceof因?yàn)榈慕Y(jié)10.rangein/withinrange在射程以內(nèi)outof/beyond