Unit+2+Topic+2+Section+C 仁爱版九年级英语上册

Unit2

SavingtheEarthTopic2SectionC学习目标预习检测知识梳理课堂总结学习导航重点探究当堂检测新课导入Let'sknowsomethingaboutO3…能熟悉并正确运用本课时的重点单词和短语12能进一步学习各种污染对地球造成的危害和造成这些污染的原因3能根据不同的阅读的目的，运用简单的阅读策略获取信息1.Therearemanybooksinthebookstore______Iwanttobuynoneofthem.A.whenB.whatC.whileD.that2.Thethief_______whenthepoliceweretalking.A.escapedB.expectedC.excusedD.encouraged预习检测CA3.Theteacherssaidthatthesun______intheeast.A.roseB.riseC.risesD.risen4.Theywent_______tothehospitaltoseetheman.A.directB.directlyC.hardlyD.slow5.Ihavenotimetoeathere,soIwantto______thefood.A.takeoff B.takeupC.takedown D.takeawayCBD知识梳理Keypoints1.Somethingswehavedoneareverygoodfortheearthwhileothersarebad.

我们所做的一些事情对地球有益，然而其他一些对地球却有负面影响。

※

Wehavedone…前省略了that,作定语从句，修饰前面的somethings.

※begoodfor对……有益；

begoodat=dowellin

擅长……;

eg:Doingmorningexercisesisgoodforourhealth.

做早操对我们的健康有益。

Heisgoodatswimming.他擅长游泳。Keypoints※①

while

conj.而，然而，相当于but.表示对比；eg:Heisaworker,whileIamateacher.他是工人而我是教师。

②whileconj.

引导时间状语；eg:Whileshewaslisteningtotheradio,shefellasleep.她听着收音机睡着了。③whileconj.

引导让步状语从句，意思是“虽然……但是……”、“尽管……但是……”(多放于句首)；eg:Whileheloveshisstudents,heisverystrictwiththem.虽然他爱他的学生，可是他对他们很严格。④whileconj.

引导条件状语，意思是“只要”；eg:Whilethereislifethereishope.只要生命存在，就有希望。⑤while作名词用，表示“一会儿”“一段时间”；eg:Shelikestoliedownforawhileafterlunch.她喜欢午饭后躺一会儿。Keypoints2.Theearthistakenaway.泥土被带走。

takeaway拿走、带走Eg:难道你要拿走他们的铅笔吗？Areyougoingtto

theirpencils?takeawayKeypoints3.Asaresult,manyriversandlakesarenowdead.结果，许多河流和湖泊都死了。※asaresult

因此，结果Eg:因此，他们会非常具有说服力。

Asaresult,theycanbeverypersuasive.※bedead死气沉沉Keypointspassthroughthehole穿过洞

passthroughEg:空气可以通过潮湿的布料。Airwill

thewetcloth.passthrough4.Toomuchharmfulradiationfromthesunpassesthroughtheholeandreachestheearthdirectly.

来自太阳的太多有害辐射穿过该孔并直接到达地球。穿过Keypoints5.Itcausestheleveloftheoceanstoriseandtheclimateoftheearthtochange.它导致了海平面的上升以及地球气温的变化。theleveloftheoceans

海平面cause

造成、使(发生)※cause…todo…Eg:这个坏消息使她伤心。

Thebadnewscausedherto

besad.※causesth.Eg:吸烟可导致肺癌。Smokingmaycauselung

cancer.地球污染问题Inourdailylife,weshouldfacemoreenvironmentalproblems.Canyousaysomethingaboutthem?

cities,pollute,healthproblemsfactories,thelandandtheair,deadInourdailylife,weshouldfacemoreenvironmentalproblems.Canyousaysomethingaboutthem?cutdown,millionsof,takeawaytheearth,becomedesert

oxygenaspecialkindofoxygencalled“ozone”(O3)氧气Inourdailylife,weshouldfacemoreenvironmentalproblems.Canyousaysomethingaboutthem?averybigholeintheozonelayer,toomuchharmfulradiationfromthesun臭氧层放射，放射物n.洞，坑v.出现，形成n.种类，形式CO2

carbondioxide

increasealot,forma“blanket”,theheatfromthesuncan’tescape二氧化碳毛毯，毯子渗出；逃跑；逃脱Inourdailylife,weshouldfacemoreenvironmentalproblems.Canyousaysomethingaboutthem?causetheleveloftheseatorisecalled“thegreenhouseeffect”or“globalwarming”v.上升；起床；升起温室效应1aReadandunderstand.Lookatthefollowingpicturesandpredictthemainideaofthepassage.fewertreesfactorypollutiontrafficpollutiontheozoneholemorecarbondioxideTheearthis4.6billionyearsold.Wehumanshavelivedontheearthforonly35000years,butduringthisperiod,wehavechangedourplanetalotinmanyways.Somethingswehavedoneareverygoodfortheearthwhileothersarebad.___________Allovertheworld,peoplehavecutdownmillionsoftrees.Whenitrainsorwhenthewindblows,theearthistakenaway.Forestshave

becomedeserts,somany

kindsofanimalsandplantsaredisappearing.FewerTrees

______________Inbigcities,carsandbuseshavepollutedtheair.Nowmanypeopleincitieshavehealthproblems._______________Factorieshavealsopollutedthelandandthewater.Asaresult,manyriversandlakesarenowdead.______________Aroundtheearth,there'saspecialkindofoxygencalled“ozone”(O3).Itisimportanttotheearth.Butnowairpollutionisdestroyingitandmakingaverybigholeintheozonelayer.Toomuchharmfulradiationfromthesunpassesthroughtheholeandreachestheearthdirectly.Thisisverydangerousbecausethiskindofradiationcancausecancer.TrafficPollutionFactoryPollutionTheOzoneLayer_________________Carbondioxide(CO2)intheairhasincreasedalot.Itmainlycomesfromburningoil,coalandwood.Thishasformedablanketaroundtheearth.Theheatfromthesuncan'tescapesothetemperatureisrising.Thisiscalled“thegreenhouseeffect”.Itcausestheleveloftheoceanstoriseandtheclimateoftheearthtochange.Alltheseproblemsareveryserious,sowemustdosomethingnow.MoreCarbonDioxide1bRead1aandcompletethefollowingtasks.1.ChoosesuitabletitlesforParagraphs2-6.Thenwriteitdowninfrontofeachparagraph.A.TrafficpollutionB.FactorypollutionC.FewertreesD.TheozoneholeE.Morecarbondioxide2.Whatdoesourplanetmeanhere?

A.Thesun.

B.Mars.

C.Themoon.

D.Theearth.3.Inthepassage,blanketrefersto

____.

A.carbondioxidearoundtheearth

B.theozonelayerinthesky

C.theforestsaroundtheworld

D.pollutionallovertheworld※※342564.TheworditinParagraph5refersto____.

A.CO2

B.O3

C.O2

D.H2O5.Whatisthebesttitleforthispassage?A.EnvironmentProblemsB.PollutionontheEarthC.HopefortheFutureD.TheGreenhouseEffect※※1cCompletethenotesaccordingto1a.ProblemEffectontheenvironmentfewertreesforestsbecomedeserts,animalsandplantsdisappeartrafficpollution

greenhouseeffect,levelofoceansrising,climatechange……carsandbusespolluteair,healthproblemspollutelandandwater,riversandlakesdeadharmfulradiationreachestheearth,causecancerfactorypollution

ozonehole

moreCO2GroupworkSurftheInternettocollectmoreinformationaboutenvironmentalproblemsandeffects.Thendiscusstheinformationingroupsandtakenotes.WritingCombinethekeypointsin1cand2toformashortpassageandpayattentiontotheproperlinkingwords.Youcanwriteitlikethis:Asweallknow,waterpollutionisbecomingmoreandmoreserious.Somefactoriespourwastewaterintotherivers.Asaresult,itmakesthewaterdirtyandsmellterrible.Mostoffishinthewaterhavediedandwecan’tswiminthewater.Waterisveryimportanttohumanbeings,soweshoulddoourbesttoprotectandsaveit.Luckily,ourgovernmentistakingmeasurestoprotectthewaterfrompollution.

通过以上活动，我们可以知道：地球正在受多方面的伤害，导致污染