人教版选修6-unit-4-global-warming课件

Unit4GlobalWarming1.consumeenergy2.greenhouse3.greenhousegases4.thegreenhouseeffect5.degreeFahrenheit6.degreeCelsius7.atmosphere8.fossilfuel9.carbondioxide10.renewablesource11.non-renewablesource12.Naturalresources消耗能源温室温室气体温室效应华氏度摄氏度大气层化石燃料二氧化碳可再生资源不可再生资源天然资源

Relatedwords:['færəhait]['selsiəs]Wedependonenergytodomanythingsinourdailylives.Makealistofthethingsthatconsumeenergyinyourhome,schooloranyotherplaces.Warming-upLights,heating,television,cassetteplayer,videorecorder,computer,fridge,washingmachine,hairdryer,airconditioner,cars….Wheredoestheenergycomefrom?Warming-upEnergysources:renewableandnon-renewable

sources.Renewablesources:energysourcesthatneverrunout.Non-renewable:energysourcesthatwillrunoutoneday.Makealistofenergysources.acoalpowerStation(燃煤发电站)non-renewablecoalwindpower(风力)renewableOil(anoilrefinery)炼油厂non-renewable[ri'fainəri]精炼厂

solar-energyrenewable

nuclearenergy(anuclearpowerplant核电站

)naturalgasPlantwastehotsprings(温泉)thesea(tidalenergy潮汐能

)Water(ahydrodam水坝)non-renewablerenewablerenewablerenewablerenewablenon-renewablemoresourcesofenergyrenewableornon-renewableNowthatwehavelearnedsomesourcesofenergyarenon-renewable,Whatshouldwedowithenergy?---Weshouldsaveenergyandthusreducetheemission(排放)ofgreenhousegases.agreenhousePre-readingWhatisagreenhousemadeof?Howdoesitwork?Itismadeof_____andplantscangrowinitwhenit’scoldoutside,becausetheglass______theheat______thesunandkeepsitfrom_______.Thismakesthegreenhouse_________andsotheplantscangrowthroughoutthecoldperiod.glass

trapsfromescapingheatupMethane['mi:θein]

WhatareGreenhousegases?Intheatmospheresurroundingtheearththerearegasescalled“greenhousegases”,including…CarbondioxideWatervaporWhat…greenhousegasesdo?

Greenhousegases

performthesamefunctionas

theglassofaglasshouse.Theytrapheatfromthesunandkeeptheairsurroundingtheearthwarm,whichiscalledthegreenhouseeffect.

温室效应Doweneedthosegases?Withoutthe“greenhouseeffect”,whatwouldhappen?Theearthwouldbeabout33℃coolerthanitis.AscientistcalledCharelesKeelingmadeaccuratemeasurementsoftheamountofcarbondioxidecontentintheatmospherefrom1957to1997.Butwhatiftherewasanincreaseingreenhousegases?Hefoundthat…Betweentheseyearsthecarbondioxideintheatmospherewentupfromaround315partstoaround370partspermillion.315(百万分之)TheEarthisBecomingWarmer--ButDoesItMatter?ReadingFirstreadingforgeneralidea:Wherecanwereadsuchanarticle?2.Whowrotethemagazinearticle?Whatisthenameofthemagazine?3.Whatisthemaintopicofthearticle?SophieArmstrongEarthCare《关爱地球》.

Fromamagazine.

(Thequotes引言arepartofthearticle,whichistypicalofmagazinearticles.）GlobalwarmingAnydifferent

fonttypes?GraphsnewwordsinboldTextFeatures4.Whatrethenamesofthethreescientistsmentionedinthearticle?1.Whatisthefirstgraphabout?2.Howhasglobalwarmingcomeabout?3.Whatdothescientiststhinkaboutglobalwarming?Dotheyagreewitheachother?4.Whatmaybetheterribleeffectsofglobalwarming?5.Whatmaybethepositiveaspectsofglobalwarming?Secondreadingfordetails:1.Whatisthefirstgraphabout?Theearthisbecomingwarmer.Graph1showsthetemperatureincreaseofonedegreeFahrenheitbetween1860to2000.2.Howhasglobalwarmingcomeabout?Itis

humanactivity

thathascausedtheglobalwarming(ratherthanarandombutnaturalphenomenon).Theproblembeginswhenhugequantitiesofextracarbondioxideareaddedintotheatmosphere.…isduetotheburningoffossilfuels…Dr.Foster:_____________________GeorgeHambley:_________________3.Whatdothescientiststhinkaboutglobalwarming?Dotheyagreewithoneanother?Itwouldbeacatastrophe.weshouldnotworryaboutit.Theyhavequitedifferentattitudestowardsthisissue.4.Whatmaybetheterribleeffectsofglobalwarming?ariseofseveralmetresinthesealevel;severestorms,droughts,famines,thespreadofdiseases,andthedisappearanceofspecies.5.Whatmaybethepositiveaspectsofglobalwarming?Plantsgrowquicker;Cropswillproducemore;Encourageagreatrangeofanimals;Makelifeforhumanbeingsbetter.Readthetextcarefullyandsumupthemainideaofeachpart.Partone:(para1)Introducetheissueofglobalwarming.Parttwo:(para2-5)Explainhowglobalwarmingcomesabout.Partthree:(para6)Listtwodifferentattitudesamongscientiststowardsglobalwarming.Partfour:(para7)It’suptoreaderstothinkanddecidewhetherpeopleshoulddosomethingaboutglobalwarmingornot.Whatskillsareusedinthefourparts?Part1Part2Part3Part4usingaquestion,leavingreaderstothinkovertheissuegivingexamples,makingcontrast(comparison)givingexamples,usinggraphs,explanationraisingaquestionListentothetape.Arethefollowingstatementstrueorfalse?(SBP27Ex2)Astatement:Weshoulddonothingaboutglobalwarming.Agreeofdisagree?Why?Group-discussion:Languagepoints:(Somephrasesinwarmingup:)消耗能量能源用完,耗尽吸收太阳的热量阻止….不被….温室气体consumeenergyenergysourcesrunouttraptheheatfromthesunkeep…..from….greenhousegasesLanguagepoints:

(SomephrasesinPassage1:)产生探究这些问题一种无规律的自然现象赞同这种观点化石燃料少量气体大量的额外的二氧化碳趋向，有...的倾向comeaboutexplorethesequestionsarandombutnaturalphenomenonsubscribetotheviewfossilfuelsmallamountsofgaseshugequantitiesofextracarbondioxidetendto10.作精确的统计11.导致一场大灾难干旱/饥荒反对这观点对环境的影响更多种类的动物17.持续转暖10.makeaccuratemeasurements11.resultin12.acatastrophe13.severedroughts/famines14.beopposedtothisview15.environmentalconsequences16.Agreaterrangeofanimals17.KeeponwarmingReading:Itdoesn’tmatter.=Itisnotimportant.ItmattersifImissthisbus.Iwillbelateforschool.Whatdoesitmatter?那有什么关系?2.对你我来说无所谓

Thatdoesnotseemmuchtoyouorme.Themanseemedtobeill.=Itseemedthatthemanwasill.Theredoesn’tseemtobemuchhope.=Itseemsthatwedon’thavemuchhope.3.…whencomparedtoothernaturalchanges.=whenitiscomparedto/with…比较compareAtoB把A比作B，比喻4.毫无疑问Thereisnodoubtthat…..Ihavesomedoubtwhether/ifhewillcometotheparty.5.IthinkTom,ratherthanyou,istoblame.而不是arandombutnaturalphenomenon一种无规律的自然现象tiredbuthappy尽管累却很快活5.subscribetotheview:agreetotheview6.少量的…smallamountsof+n(常加不可数n)anamountofmoney谓语动词用单数largeamountsofmoney谓语动词用复数inquantity=inhugequantities=inlargenumbers大量地7.addAtoB

addsomesugartoyourcoffeeaddupallthenumbers把加起来

addupto合计达

addtodifficulty增加困难8.trapheat吸热/被困在betrappedin9.使地球温度升高

causetheglobaltemperaturetogoup给某人带来很多麻烦causesbmuchtrouble10.goup:rise（vi）Pricesseemtobegoingup/berising.raise(vt)theprice/yourhand/somepigs11.Makeaccuratemeasurementsoftheamountofcarbondioxide.对…数量进行精确的统计12.导致失败resultinfailure

由他的粗心引起resultfromhiscarelessnessHowhighwillthetemperatureincrease

go?aslowas1degreeCelsius,ashighas5degreesas/solongas只要

as/sofarasIknow就某人所知

Hewaitedformeaslongasthreehours.13.theattitudetowards/tothequestion14.increasethetemperatureby5degrees

（增加了5度）

Thetemperaturerose/increasedto10degrees.（增加到10度）15.Iagreewithyou/whatyousaid.Theyagreedontheplan.(双方)达成共识Heagreedtotheplan/theview/suggestion.

agreetodosth.16.反对这种观点beopposedtothisviewobjecttothisview17.bemild…amildclimate/nature温和的气候/性格haveamildfever轻微发烧mildpunishment轻罚18.agreatrangeof:agreatvarietyofalargenumberof19.buildup逐渐增加，聚集

buildupone’sfortune累积/聚集财富

buildupone’sbody健身buildupone’sstrength养精蓄锐,增强体力

Wearebuildingupagoodbusiness.我们的生意兴隆。20.keepondoingsth.

继续干某事(动作时断时续)

或反复做某事keepdoing一直做….21.fordecades数十年adecade十年thefirstdecadeofthe20thcentury20世纪的头十年①Itishumanactivitythathascausedthisglobalwarmingratherthanarandombutnaturalphenomenon.(Line6)②ItwasascientistcalledCharlesKeeling,whomadeaccuratemeasurementsoftheamountofcarbondioxide……(Line7)③Itistheburningofmoreandmorefossilfuelsthathadresultedinthisincreaseincarbondioxide.(Line15)找出文中的强调句型:课堂检测：

Findthewordsorphrasesinthetexttoreplacetheunderlinedones.Itisclearthatglobalwarminghasbecomeoneofthemostseriousproblemswhichhumanbeinghavetoface.Buthowdoesthishappen?Allscientistsagreetotheviewthattheearth’stemperaturegoingupisbecauseof