Unit 2 Topic 2 Section C課件仁愛版英語(yǔ)九年級(jí)上冊(cè)

Unit2SavingtheEarthTopic2AlltheseproblemsareveryseriousSectionCLanguagegoalsBytheendoftheclass,youwillbeableto1.Masterthefollowingwords,phrasesandsentences:Words：

hole,form,risePhrases:

takeaway,refertoSentences：Alltheseproblemsareveryserious,sowemustdosomethingnow.2.UnderstandtheOzonelayer(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.NonenobodyothersothersomethinganythingeveryoneanybodyeverywhereRevisionWhatcanwedotoprotectourenvironment?GiveaspeechInourdailylife,weshouldfacemoreenvironmentalproblems.Canyousaysomethingaboutthem?

cities,pollute,healthproblems

factories,thelandandtheair,deadInourdailylife,weshouldfacemoreenvironmentalproblems.

Canyousaysomethingaboutthem?

cutdown,millionsof,takeawaytheearth,becomedesertWatchthevideoanddiscusswhatyouhavelearntfromit.Watchthevideoanddiscusswhatyouhavelearntfromit.1.Isozonelayerimportantorunimportant?It'sveryimportant.2.Cantheozonelayerprotectus?Yes.3.Whathappenedtoitnow?Thereisabigholeintheozonelayer.4.What'stheeffectofit?It'sharmfultoallthelivingthings,especiallytohumansforitdoesharmtooureyesandskin.臭氧層Ozoneisaspecialkindofoxygen.Itcanprotecttheearth.氧氣Inourdailylife,weshouldfacemoreenvironmentalproblems.Canyousaysomethingaboutthem?

oxygenaspecialkindofoxygencalled“ozone”(O3)averybigholeintheozonelayer,toomuchharmfulradiationfromthesun放射，放射物Inourdailylife,weshouldfacemoreenvironmentalproblems.Canyousaysomethingaboutthem?CO2

carbondioxideincreasealot,forma“blanket”,theheatfromthesuncan’tescape.二氧化碳滲出；逃跑；逃脫毛毯，毯子causetheleveloftheseatorisecalled“thegreenhouseeffect”or“globalwarming”溫室效應(yīng)globalwarmingfewertreesfactorypollutiontrafficpollutiontheozonelayermorecarbondioxideCanyoumatchthem?1aReadandunderstand.Lookatthefollowingpicturesandpredictthemainideaofthepassage.ChoosesuitabletitlesforParagraphs2-6.Thenwriteitdowninfrontofeachparagraph.

Theearthis4.6billion

yearsold.Wehumanshavelivedontheearthforonly35000years,butduringthisperiod,

wehavechangedourplanet

alotinmanyways.Somethingswe’vedoneareverygoodfortheearthwhilesomearebad._________

Allovertheworld,peoplehavecutdownmillionsoftrees.Whenitrainsorwhenthewindblows,theearthistakenaway.Forestshavebecomedeserts,somany

kinds

ofanimalsandplantsaredisappearing.FewerTreesA.TrafficpollutionB.FactorypollutionC.FewertreesD.TheozoneholeE.Morecarbondioxide

____________

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

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

andmaking

averybigholeintheozonelayer.Toomuchharmfulradiationfromthesunpassesthroughtheholeandreachestheearthdirectly.

Thisisverydangerousbecausethiskindofradiationcancausecancer.TrafficPollutionFactoryPollutionTheOzoneLayer直接地

________________

Carbondioxide(CO2)intheairhasincreasedalot.Itmainlycomesfromburningoil,coalandwood.Thishasformedablanket

aroundtheearth.Theheatfromthesuncan’tescapesothetemperatureisrising.Thisiscalled“thegreenhouseeffect”.Itcausestheleveloftheoceanstoriseandtheclimateoftheearthtochange.

Alltheseproblemsareveryserious,sowemustdosomethingnow.MoreCarbonDioxide1bRead1aandcompletethefollowingtasks.2.Whatdoesourplanet

meanhere?A.Thesun.

B.Mars.C.Themoon.

D.Theearth.3.Inthepassage,blanket

refersto____.A.carbondioxidearoundtheearthB.theozonelayerintheskyC.theforests

aroundtheworldD.pollutionallovertheworldDA1bRead1aandcompletethefollowingtasks.4.TheworditinParagraph5

refersto____.A.CO2

B.O3

C.O2

D.H2O5.Whatisthebesttitleforthispassage?A.EnvironmentProblemsB.PollutionontheEarthC.HopefortheFutureD.TheGreenhouseEffect

BA1cCompletethenotesaccordingto1a.ProblemEffectontheenvironmentfewertreesforestsbecomedeserts,animalsandplantsdisappeartrafficpollution

greenhouseeffect,levelofoceansrising,climatechangecarsandbusespolluteair,healthproblemspollutelandandwater,riversandlakesdeadharmfulradiationreachestheearth,causecancerfactorypollution

ozonehole

moreCO22SurftheInternettocollectmoreinformationaboutenvironmentalproblemsandeffects.Thendiscusstheinformationingroupsandtakenotes.3.Combinethekeypointsin1cand2tof