九年级下册 英语 第三单元《Lesson 2 Reading》课件

九年级下册-上海教育出版社-英语-第三单元Unit3TheenvironmentLesson2Reading学习目标通过文本阅读，理解核心词汇的含义及用法。通过因果关系的分析，学习文本体裁,理解话题内容；培养保护环境、绿色生活的意识。通过微技能训练，提高获取信息、处理信息的能力和答题的准确性。

pollutionsea-levelrisinganimalsdyingclimatechangingglobalwarmingTopictalking:TheworldisindangerWhatdoyouknowaboutthegreenhouseeffect?atmosphere大气层n.temperature气温n.carbondioxide二氧化碳

n.increase升高v.efbdca

MatchingP34A12.Whatproblemsdoesthearticlediscuss?1.Whatisthearticlemainlyabout?Environmentalproblems.ThegreenhouseeffectCuttingdownforestsBadhabitsTitleIntroductionSub-headingsPre-reading:PredictionPre-readingThearticleisprobablyfroma(n)______.

A.advertisement（广告）

B.posterabouttheEarthHour

C.environmentalsciencebook

D.comic（连环画）book

A.Anarration

(记叙文)

B.Adescription（描述文）

C.Anargumentation（议论文）

D.Anexposition（说明文）Pre-readingWhatisthegenre(体裁)

ofthisarticle?narrationdescriptionargumentationexposition记叙文是记人叙事的文章，例如故事类、人物传记类的文章，通常包含时间、地点、人物、事件的起因、过程和结果等要素。

（5Ws+1H）描述文以描绘人物、事物、景物为主，刻画和描摹人物的外貌、动作；事物的性质、形态；景物的状貌、变化。议论文是一种剖析事物、论述事理、发表意见、提出主张的文体。说明文是用简明的语言，客观、准确、科学地解说事物或阐述事理的一种文章体裁。(What/Why/How)

A.Anarration

（记叙文）

B.Adescription（描述文）

C.Anargumentation（议论文）

D.Anexposition（说明文）Pre-readingWhatisthegenre(体裁)ofthisarticle?Itisatypeofinformationaltextthattellssomethingaboutatopicoranideatoreaders.Thepurposeistoinform,explain,describeordefinethesubjecttoreaders.Wewillfindsomefacts,examples,supportingdetailsandsometimestheauthor’sownopinioninthetext.ReadingforstructureIntroductionProblem1Problem2SolutionProblem3ReadingforstructureOurworldisindanger.ThegreenhouseeffectWemusttakeproperaction.CuttingdownforestsBadhabitsIntroductionMainproblemsSolution

ReadingfordetailsThegreenhouseeffectWhatistheatmosphere

aroundtheworldlike?2.Whatmaythegreenhouseeffectcause?

Whatistheatmospherearoundtheworld

like?ReadingfordetailsTheatmospherearoundtheEarthisnecessaryforalllivingthings.Itisliketheglassofagreenhouse,lettingsunlightinandkeepingheatfromgettingout.Withoutit,theEarthwouldbethesameastheMoon—coldandlifeless.=nolifeThegreenhouseeffectWhenweburnfuelssuchaspetrolandcoal,weproduceagascalledcarbondioxide(CO2).Toomuchofthisgaspollutestheatmosphere,andcausesittokeepintoomuchheat.Asaresultofthegreenhouseeffect,theEarth’stemperatureisincreasing.Thiscausessealeveltorise,andinthefuturemaycausecitiestodisappear.CompletethefollowingchartCauses原因ThegreenhouseeffectA.气体B.垃圾C.木头D.燃料

burnfuelsproduceCO2temperature:increasesealevel:risecities:disappearEffects结果CuttingdownforestsCuttingdownforestsCuttingdownforests_______the______oftheanimalsand______________soilerosion(水土流失)，________andevenmore__________toourworld.destroyshomesresultsinfloodsdamageEveryyear,wedestroy

naturebycuttingdownhugeareasofforests.ThismakesthegreenhouseeffectworsebecausetreestakeinCO2andproduceoxygen.Cuttingdowntreesalsodestroysthehomesoftheanimalsthatliveinourforests,andcausesthesurfaceofthesoiltobeeasilydestroyedbyrain.Thiscanresultinfloodsandevenmoredamagetotheenvironment.BadhabitsBadhabitsCreatemountainsofrubbishThrowthemawayUsethingsonceManyofourhabitscausepollution.Peopleoftenusethingsonceandthenthrowthemaway,orleavethemonthegroundaslitter.Thiscreatesmountainsofrubbishandpollutesourlandandseas.PolluteourlandandseasSolutionMakealist1.Becomegreenconsumers.2.Recyclethings.3.Reusethingsforthesame

purposeasbefore.4.Usethingsfornewpurposes.Solution:takeactionInordertoprotecttheenvironment,weneedtotakeproperaction.Weshouldbedifferentfrommanyconsumersandbecome“greenconsumers”.Thismeansthatweshouldonlybuyanduseproductsfriendlytotheenvironment.Weshouldalsorecycleasmanythingsaswecan.Wecanreusethingsforthesamepurposeasbefore,orwecanusethemfornewpurposes.Ifwejustlearntoliveinnewanddifferentways,wecanmakeadifference.

Readingsub-skills理解所读材料的主旨大意；理解所读材料的具体信息；根据上下文和构词法推断、理解生词的含义；对所读内容做出简单的判断和推理；理解文段中各句子之间的逻辑关系；理解作者的意图、观点和态度；理解故事的情节，预测故事情节的发展和可能的结局。Whatdoestheunderlinedword“This”inL21referto?A.Thecarbondioxide.

B.Theatmosphere.

C.Thegreenhouseeffect.

D.Theincreasingtemperature.Tip:联系上文，弄清指代关系MoreexercisesareonP37D1

Comprehensions实战演练2.Thepurposeofthearticleistomake_________.A.peopledomoretoprotecttheenvironment

B.morepeoplebecomeconsumers

C.peoplelearnmoreabouttheatmosphere

D.peoplechangetheirbadhabits

考查作者意图Tip:理解主旨大意，切忌以偏概全。

考查推断能力Tip:寻找相关依据，做出正确推断。3.Iftherearemoretrees,theamountofCO2willbe____.

A.moreB.lessC.thesameD.noneEveryyear,wedestroynaturebycuttingdownhugeareasofforests.ThismakesthegreenhouseeffectworsebecausetreestakeinCO2andproduceoxygen.Line25-30Post-reading:CausesandeffectsAsar______ofthegreenhouseeffect,theEarth’stemperatureisi___________,sealevelisrisingandcitiesmaydisappear.Cuttingdownforestsd_______thehomesoftheanimalsandresultsinsoilerosion,f______andevenmoredamagetoourworld.Ourbadhabitscreatemountainsofrubbishandpolluteourlandandseas.Therefore,weshouldtakep______action.FillintheblanksresultincreasingdestroysfloodsproperPost-reading:DeepthinkingWhatwillhappenifwedon’tmakeadifference?Let’slivealow-carbonlife!Travelbypublictransportation.Turnofflightsorelectricapplianceswhennotusing.Takeashortershowerinsteadofabath.Dowastesorting.Getridofbadhabits.Reduce,reuseandrecycle.…分体裁说明文总总Summary中心突出科学性条理性小标题段落主题句各段主题均从不同角度解释篇章主旨猜词微技能作者意图推断分析原因结果指代Summary广州市越秀区教育局Findoutmoreenvironmentalproblemsthatwefaceandmakealistofwhatweshoulddotoprotectourworld.FinishtheexercisesonP36-37.HomeworkThankyou!九年级下册-上海教育出版社-英语-第三单元Reading(答疑)Unit3TheenvironmentCauseandeffectCause:Thereasonwhysomethinghappens

事情发生的原因Effect:Whathappensbecauseofthecause

由于原因而发生的事情Transitionalwordsandphrases

effectTherefore,sohencethusconsequently…resultin……

causesinceasbecausebecauseofasaresultof…Fillintheblankswithpropertransitionalwordsorphrases.____________ourworldisindanger,wemustprotectit.____________thegreenhouseeffect,theearthisgettingwarmerandwarmer.Cuttingdowntreescan___________soilerosionandfloods.Peoplepollutetheairandcutdownforests._________,thegreenhouseeffectbecomesworse.Since/As/BecauseBecauseof/Asaresultofresultin/leadto/causeTherefore/Asaresult/ForthisreasonPatternsofcause-effectrelationshipcause2cause1cause3effecteffect2effect1effect3causeManycauses--singleeffectpatternSinglecause--manyeffectspatternSinglecause--singleeffectpatterncauseeffectCasualchainpatterncauseeffect(cause)effect(cause)effect(cause)effect(cause)effectThegreenhouseeffect

Causes*burnfuels*pollutetheatmosphere*greenhouseeffect*sealevelrisesandcitiesmayevendisappear.

Effects*producecarbondioxide*keepintoomuchheat*temperatureincreasesExampleCasualchainpatternCuttingdownforests

Cause

Wedestroynaturebycuttingdownhugeareasofforests.Effect1Effect2Effect3Effect4Thegreenhouseeffectbecomesworse.Thehomesofanimalsaredestroyed.Thesurfaceofthesoilisdestroyedbyrain.Floodstakeplaceandmoredamageisdonetotheenvironment.ExampleSinglecause--manyeffectspatternBadhabits

Cause

Peopleoftenusethingsonceandthenthro