Unit2Topic2SectionC课件英语九年级上册

Topic2AlltheseproblemsareveryseriousUnit2SavingtheearthSectionC

行业PPT模板http:///hangye/1.Knowledgeaims：

掌握本课的重点词汇和短语，初步感知定语从句。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。2.Skillaims:能读懂有关环境问题的文章。能根据不同的阅读目的，运用简单的阅读策略获取信息。能正确运用网络资源获取需要的信息。能用英语书面的形式表达环境问题的成因及危害。3.Emotionalaims:(optional)通过学习，了解环境现状，帮助学生树立绿色环保意识。4.Cultureawareness:(optional)了解各种环境问题，如臭氧空洞，温室效应等，意识到环境问题的严峻形势。Teachingaims(1)________ofusknowshowtostopthebadbehavior.(2)Iknockedonthedoorbut___________answered.(3)Someofthesebooksarebetterthan__________.(4)Shewasdrivingthecarwithonehandandwipingthewindowwiththe_______.(5)TheyarebeautifulbutIamlookingfor___________useful.(6)Isthere___________youcandotohelpher?(7)There’re5000peoplelivinghereandalmost_________hashis/herowncar.(8)He’sclevererthan____________Iknow.(9)I’velooked__________butIcan’tfindit.Fillintheblanksusingsomething,anything,others,nobody,everyone,anybody,everywhere,none,other.RevisionNonenobodyothersothersomethinganythingeveryoneanybodyeverywhereWhatcanwedotoprotectourenvironment?Inourdailylife,weshouldfacemoreenvironmentalproblems.Canyousaysomethingaboutthem?

cities,pollute,healthproblems

factories,thelandandtheair,deadInourdailylife,weshouldfacemoreenvironmentalproblems.

Canyousaysomethingaboutthem?

拿走deserts[ˈdezəts]n.沙漠

Inourdailylife,weshouldfacemoreenvironmentalproblems.Canyousaysomethingaboutthem?

oxygen

aspecialkindofoxygencalled“ozone”(O3)氧气

averybigholeintheozonelayer,toomuchharmfulradiationfromthesun臭氧层放射，放射物n.洞，坑v.出现，形成n.种类，形式Inourdailylife,weshouldfacemoreenvironmentalproblems.Canyousaysomethingaboutthem?CO2

carbondioxideincreasealot,forma“blanket”,theheatfromthesuncan’tescape二氧化碳毛毯，毯子渗出；逃跑；逃脱

causetheleveloftheseatorisecalled“thegreenhouseeffect”or“globalwarming”v.上升；起床；升起温室效应fewertreesfactorypollutiontrafficpollutiontheozonelayermorecarbondioxideCanyoumatchthem?1aReadandunderstand.Readformaininformation1b1.ChoosesuitabletitlesforParagraphs2-6.Thenwriteitdowninfrontofeachparagraph.A.TrafficpollutionB.FactorypollutionC.FewertreesD.TheozoneholeE.Morecarbondioxideonearth究竟，到底（用于疑问词后）FewerTrees

____________

Inbigcities,carsandbuseshavepollutedtheair.Nowmanypeopleincitieshavehealthproblems._____________Factorieshavealsopollutedthelandandthewater.Asaresult,manyriversandlakesarenowdead._____________

Aroundtheearth,there’saspecialkindofoxygencalled“ozone”(O3).Itisimportanttotheearth.Butnowairpollutionisdestroyingit

andmaking

averybigholeintheozonelayer.Toomuchharmfulradiationfromthesunpassesthroughtheholeandreachestheearthdirectly.

Thisisverydangerousbecausethiskindofradiationcancausecancer.直接地TrafficPollutionFactoryPollutionTheOzoneLayerA.TrafficpollutionB.FactorypollutionC.FewertreesD.TheozoneholeE.MorecarbondioxideMoreCarbonDioxideA.TrafficpollutionB.FactorypollutionC.FewertreesD.TheozoneholeE.Morecarbondioxide2.Whatdoesourplanet

meanhere?A.Thesun.

B.Mars.C.Themoon.

D.Theearth.3.Inthepassage,blanket

refersto____.A.carbondioxidearoundtheearthB.theozonelayerintheskyC.theforests

aroundtheworldD.pollutionallovertheworldDAReadfordetailsrefertosb./sth.谈及/说起/指的是,

比mentionsth./sb.更为正式他曾几次提到过你。Hereferredtoyouseveraltimes.你是说我吗？Areyoureferringtome?4.TheworditinParagraph5

refersto____.A.CO2

B.O3

C.O2

D.H2O5.Whatisthebesttitleforthispassage?A.EnvironmentProblemsB.PollutionontheEarthC.HopefortheFutureD.TheGreenhouseEffectBAReadfordetailsTheearthis4.6billionyearsold.Wehumanshavelivedontheearthforonly35000years,butduringthisperiod,wehavechangedourplanetalotinmanyways.Somethingswe’vedoneareverygoodfortheearthwhileothersarebad.Inbigcities,carsandbuseshavepollutedtheair.Nowmanypeopleincitieshavehealthproblems.Factorieshavealsopollutedthelandandthewater.Asaresult,manyriversandlakesarenowdead.Aroundtheearth,there’saspecialkindofoxygencalled“ozone”(O3).Itisimportanttotheearth.Butnowairpollutionisdestroyingit

andmaking

averybigholeintheozonelayer.Toomuchharmfulradiationfromthesunpassesthroughtheholeandreachestheearthdirectly.

Thisisverydangerousbecausethiskindofradiationcancausecancer.Watchthevideoanddiscusswhatyouhavelearntfromit.1.

Isozonelayerimportantorunimportant?

It'sveryimportant.2.Cantheozonelayerprotectus?

Yes.3.

Whathappenedtoitnow?

Thereisabigholeintheozonelayer.4.

What'stheeffectofit?

It'sharmfultoallthelivingthings,especiallytohumans

foritdoesharm

tooureyesandskin.臭氧层Ozoneisaspecialkindofoxygen.Itcanprotecttheearth.氧气Alltheseproblemsareveryserious,sowemustdosomethingnow.1cCompletethenotesaccordingto1a.ProblemEffectontheenvironmentfewertreesforestsbecomedeserts,animalsandplantsdisappeartrafficpollution

greenhouseeffect,levelofoceansrising,climatechangecarsandbusespolluteair,healthproblemspollutelandandwater,riversandlakesdeadharmfulradiationreachestheearth,causecancerfactorypollution

ozonehole

moreCO2Keyphrases:1.在地球上2.究竟3.在这段时间、期间4.一些……，另一些……（表示泛指）5.全世界6.拿走7.许多种类的8.不同种类的9.各种各样的10.一颗被叫作……的行星11.一颗名字为……的行星12.被叫作……（作谓语）13.对……重要14.……上的一个洞ontheearthonearthduringthisperiodsome…，others…allovertheworld=aroundtheworldtakeawaymanykindsofdifferentkindsofallkindsofaplanetcalled/named…=aplanetwiththenameof…becalled…beimportantto/for…aholein…Keyphrases:1.穿过这个洞2.对……有益的/有害的3.温室效应4.从……逃走5.在许多方面6.结果7.导致癌症8.引起、导致某人做某事9.涉及……/有关……/提到……passthroughtheholebegood/badforthegreenhouseeffectescapefrominmanywaysasaresultcausecancercausesb.todosth.refertosb./sth.1.Wehumanshavelivedontheearthforonly35000years,butduringthisperiod,wehavechangedourplanetalotinmanyways.

我们人类生活在地球上只有三万五千年,但是在此期间,我们在许多方面改变了

我们的星球。

ontheearth在地球上

onearth究竟,到底(用于疑问句后以加强语气)

wehumans我们人类we是主语,humans是we的同位语,补充说明“我们”

inmanyways

在许多方面2.Somethingswe’vedoneareverygoodfortheearthwhileothersarebad.我们已经做的一些事情对地球有益,而其它的却有害。

somethings(that)wehavedone定语从句,修饰先行词somethings

(1).①while“然而”并列连词,表对比②while作从属连词,意思是“在...的时候”,表示一个动作在进行的同时,另一个动作也在发生。e.g.Strikewhiletheironishot.

趁热打铁。③while还可用作名词,意为“一会儿,一段时间”,主要用于短语中。

e.g.afterawhile过了一会儿

allthewhile一直

ashort/littlewhileago刚才

waitforawhile等一会儿

onceinawhile偶尔及时练习1

1.LeiFengwasalwaysreadytohelp______.A.theothersB.othersC.anotherD.theother2.Ihavetwonovels.OneisinEnglish,and_______isinJapanese.A.theotherB.anotherC.otherD.others3.Theglassisbroken.Getme_______.A.theotherB.anotherC.otherD.theothers4.Therearetennewbooksonthedesk.Tomtookawaysomeofthem.______werelost.A.theotherB.othersC.anotherD.theothersBABD3.Whenitrainsorwhenthewindblows,theearthistakenaway.

当下雨或刮风时,土壤就会被带走。

含有away的短语:putaway整理

goaway走开

beawayfrom离开runaway逃跑

giveaway捐赠

throwaway扔掉

4.Toomuchharmfulradiationfromthesunpassesthroughtheholeandreachestheearthdirectly.

太多来自太阳的有害射线穿过这个洞直接到达地球。

passthrough穿过directlyadv.直接地directadj.直接的directionn.方向5.Theheatfromthesuncan’tescapesothetemperatureisrisingrise和raise