Unit2SavingtheEarthTopic2SectionC 學習導航新知學習課堂小結當堂檢測學習目標重點研討新知學習課堂小結當堂檢測學習目標重點研討學習目標1.能熟悉并正確運用本課時的重點單詞和短語2.能進一步學習各種污染對地球造成的危害和造成這些污染的原因3.能根據不同的閱讀目的，運用簡單的閱讀策略獲取信息新知學習課堂小結當堂檢測學習目標重點研討NewwordsOzoneisaspecialkindofoxygen.Itcanprotecttheearth.ozonelayer

[?o?zo?nler][?ɑ?ks?d??n]臭氧氧氣臭氧層新知學習課堂小結當堂檢測學習目標重點研討Peopleproducelotsofharmfulchemicalsintotheair.Theycauseabigholeintheozonelayer.Sotheradiationcanpassthroughtheholeandreachtheearthdirectly.

[?re?di?e??n]穿過[d??rektli]Newwords放射物直接地新知學習課堂小結當堂檢測學習目標重點研討Newwordscarbondioxide/?kɑ:b?nda???ksa?d/

oxygen/'?k

s?

d??n/CO2二氧化碳O2氧氣Treescanbreathein__________________andbreatheout_________________.carbondioxide(CO2)oxygen(O2)吸入呼出新知學習課堂小結當堂檢測學習目標重點研討形成

/?bl??k?t/毯子/??ske?p/

逃離、滲出Ithasformedablanketandtheheatfromthesuncan’tescape.Thetemperatureisrising.rise/?ra?z/上升ButCarbondioxidehasincreasedalot.(增加)(熱氣)Newwords新知學習課堂小結當堂檢測學習目標重點研討1aReadandunderstand.Lookatthefollowingpicturesandpredictthemainideaofthepassage.fewertreesfactorypollutiontrafficpollutiontheozoneholemorecarbondioxide新知學習課堂小結當堂檢測學習目標重點研討Theearthis4.6billionyearsold.Wehumanshavelivedontheearthforonly35000years,butduringthisperiod,wehavechangedourplanetalotinmanyways.Somethingswehavedoneareverygoodfortheearthwhileothersarebad.___________Allovertheworld,peoplehavecutdownmillionsoftrees.Whenitrainsorwhenthewindblows,theearthistakenaway.Forestshave

becomedeserts,somany

kindsofanimalsandplantsaredisappearing.FewerTrees新知學習課堂小結當堂檢測學習目標重點研討

______________Inbigcities,carsandbuseshavepollutedtheair.Nowmanypeopleincitieshavehealthproblems._______________Factorieshavealsopollutedthelandandthewater.Asaresult,manyriversandlakesarenowdead.______________Aroundtheearth,there'saspecialkindofoxygencalled“ozone”(O3).Itisimportanttotheearth.Butnowairpollutionisdestroyingitandmakingaverybigholeintheozonelayer.Toomuchharmfulradiationfromthesunpassesthroughtheholeandreachestheearthdirectly.Thisisverydangerousbecausethiskindofradiationcancausecancer.TrafficPollutionFactoryPollutionTheOzoneLayer新知學習課堂小結當堂檢測學習目標重點研討_________________Carbondioxide(CO2)intheairhasincreasedalot.Itmainlycomesfromburningoil,coalandwood.Thishasformedablanketaroundtheearth.Theheatfromthesuncan'tescapesothetemperatureisrising.Thisiscalled“thegreenhouseeffect”.Itcausestheleveloftheoceanstoriseandtheclimateoftheearthtochange.Alltheseproblemsareveryserious,sowemustdosomethingnow.MoreCarbonDioxide新知學習課堂小結當堂檢測學習目標重點研討1bRead1aandcompletethefollowingtasks.1.ChoosesuitabletitlesforParagraphs2-6.Thenwriteitdowninfrontofeachparagraph.A.TrafficpollutionB.FactorypollutionC.FewertreesD.TheozoneholeE.Morecarbondioxide2.Whatdoesourplanetmeanhere?

A.Thesun.

B.Mars.

C.Themoon.

D.Theearth.※34256新知學習課堂小結當堂檢測學習目標重點研討3.Inthepassage,blanketrefersto

____.

A.carbondioxidearoundtheearth

B.theozonelayerinthesky

C.theforestsaroundtheworld

D.pollutionallovertheworld4.TheworditinParagraph5refersto____.

A.CO2

B.O3

C.O2

D.H2O5.Whatisthebesttitleforthispassage?A.EnvironmentProblemsB.PollutionontheEarthC.HopefortheFutureD.TheGreenhouseEffect※※※新知學習課堂小結當堂檢測學習目標重點研討1cCompletethenotesaccordingto1a.ProblemEffectontheenvironmentfewertreesforestsbecomedeserts,animalsandplantsdisappeartrafficpollution

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

ozonehole

moreCO2新知學習課堂小結當堂檢測學習目標重點研討2SurftheInternettocollectmoreinformationaboutenvironmentalproblemsandeffects.Thendiscusstheinformationingroupsandtakenotes.新知學習課堂小結當堂檢測學習目標重點研討3Combinethekeypointsin1cand2toformashortpassageandpayattentiontotheproperlinkingwords.Asweallknow,waterpollutionisbecomingmoreandmoreserious.Somefactoriespourwastewaterintotherivers.Asaresult,itmakesthewaterdirtyandsmellterrible.Mostoffishinthewaterhavediedandwecan’tswiminthewater.Waterisveryimportanttohumanbeings,soweshoulddoourbesttoprotectandsaveit.Luckily,ourgovernmentistakingmeasurestoprotectthewaterfrompollution.Youcanwriteitlikethis:新知學習課堂小結當堂檢測學習目標重點研討Keypoints1.Somethingswehavedoneareverygoodfortheearthwhileothersarebad.我們所做的一些事情對地球有益，然而其他一些對地球卻有負面影響。※

Wehavedone…前省略了that,作定語從句，修飾前面的somethings.※begoodfor對……有益；begoodat=dowellin

擅長……;eg:Doingmorningexercisesisgoodforourhealth.做早操對我們的健康有益。Heisgoodatswimming.他擅長游泳。新知學習課堂小結當堂檢測學習目標重點研討※①

while

conj.而，然而，相當于but.表示對比；eg:Heisaworker,whileIamateacher.他是工人而我是教師。

②whileconj.

引導時間狀語；eg:Whileshewaslisteningtotheradio,shefellasleep.她聽著收音機睡著了。③whileconj.

引導讓步狀語從句，意思是“雖然……但是……”、“盡管……但是……”(多放于句首)；eg:Whileheloveshisstudents,heisverystrictwiththem.雖然他愛他的學生，可是他對他們很嚴格。④whileconj.

引導條件狀語，意思是“只要”；eg:Whilethereislifethereishope.只要生命存在，就有希望。⑤while作名詞用，表示“一會兒”“一段時間”；eg:Shelikestoliedownforawhileafterlunch.她喜歡午飯后躺一會兒。新知學習課堂小結當堂檢測學習目標重點研討2.Theearthistakenaway.泥土被帶走。

takeaway拿走、帶走Eg:難道你要拿走他們的鉛筆嗎？Areyougoingtto

theirpencils?takeaway新知學習課堂小結當堂檢測學習目標重點研討3.Asaresult,manyriversandlakesarenowdead.結果，許多河流和湖泊都死了。※asaresult

因此，結果Eg:因此，他們會非常具有說服力。

,theycanbeverypersuasive.Asaresult※bedead死氣沉沉新知學習課堂小結當堂檢測學習目標重點研討passthroughthehole穿過洞

passthroughEg:空氣可以通過潮濕的布料。Airwill

thewetcloth.passthrough4.Toomuchharmfulradiationfromthesunpassesthroughtheholeandreachestheearthdirectly.

來自太陽的太多有害輻射穿過該孔并直接到達地球。穿過新知學習課堂小結當堂檢測學習目標重點研討5.Itcausestheleveloftheoceanstoriseandtheclimateoftheearthtochange.它導致了海平面的上升以及