Unit

2SavingtheEarthTopic2Alltheseproblemsareveryserious.SectionCTeachingaims學(xué)習(xí)目標(biāo)：1、掌握本課的重點(diǎn)詞匯和短語(yǔ)；

2、進(jìn)一步學(xué)習(xí)各種污染對(duì)地球造成的危害和

造成這些污染的原因。情感目標(biāo)：通過學(xué)習(xí)，了解環(huán)境現(xiàn)狀，幫助學(xué)生樹立綠色

環(huán)保意識(shí)。教學(xué)重點(diǎn)：正確運(yùn)用不定代詞和副詞；閱讀策略的運(yùn)用。教學(xué)難點(diǎn)：運(yùn)用所學(xué)知識(shí)，完成談?wù)摥h(huán)境保護(hù)的文章。檢查預(yù)習(xí)稿LeadinHowoldistheearth?4.6billionyearsold.Whatabouthumans?Wehumanshavelivedontheearthforonly35000years.LookandPredict.Pre-readingReadthepassageandchoose.5.Whatisthebesttitleforthispassage?A.EnvironmentProblemsB.PollutionontheEarthC.HopefortheFutureD.TheGreenhouseEffectWhile-reading________________________________________________theearthwemustdosomethingproblemsandeffectsEnvironmentalproblemsPart1:Part2:Part3:①②--⑥⑦Whatisthestructureofthispassage?Readfordetails.Part1Howoldistheearth?4.6billionyearsoldHowlonghavewelivedontheearth?35,000yearsHasourplanetchangedalot?Yes2.Whatdoesourplanet

meanhere?A.Thesun.

B.Mars.C.Themoon.

D.Theearth.

Theearthis4.6billion

yearsold.Wehumanshavelivedontheearthforonly35000years,butduringthisperiod,

wehavechangedourplanet

alotinmanyways.Somethingswe’vedoneareverygoodfortheearthwhilesomearebad.Paragraph1

1.

ontheearth在地球上2.duringthisperiod在這個(gè)時(shí)期

3.

changeourplanetalot大大改變了我們的星球4.begoodfor對(duì)......有好處1.ChoosesuitabletitlesforParagraphs2-6.

Thenwriteitdowninfrontofeachparagraph.A.TrafficpollutionB.FactorypollutionC.FewertreesD.TheozoneholeE.MorecarbondioxidefewertreesfactorypollutiontrafficpollutiontheozonelayermorecarbondioxidePart2carbondioxide二氧化碳/‘ka:

b?ndai’a:

ksaid/ozone臭氧

/’?uz?un/___________

Allovertheworld,peoplehavecutdownmillionsoftrees.Whenitrainsorwhenthewindblows,theearthistakenaway.Forestshavebecomedeserts,somany

kinds

ofanimalsandplantsaredisappearing.FewerTreesParagraph21.allovertheworld全世界2.cutdown

砍伐3.millionsoftrees數(shù)以百萬(wàn)計(jì)的樹木4.takeaway拿走，取走

_______________

Inbigcities,carsandbuseshavepollutedtheair.Nowmanypeopleincitieshavehealthproblems.________________Factorieshavealsopollutedthelandandthewater.Asaresult,manyriversandlakesarenowdead.________________

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

andmaking

averybigholeintheozonelayer.Toomuchharmfulradiationfromthesunpassesthroughtheholeandreachestheearthdirectly.

Thisisverydangerousbecausethiskindofradiationcancausecancer.TrafficPollutionFactoryPollution

OzoneHole直接地Paragraph3-51.aspecialkindofoxygen一種特殊的氧氣2.makeaverybighole形成一個(gè)非常大的洞3.ozonelayer

臭氧層4.harmfulradiationfromthesun來自太陽(yáng)的有害的射線5.passthrough穿過6.reachtheearthdirectly

直接地到達(dá)地球7.causecancer

致癌

___________________

Carbondioxide(CO2)intheairhasincreasedalot.Itmainlycomesfromburningoil,coalandwood.Thishasformedablanket

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

Alltheseproblemsareveryserious,sowemustdosomethingnow.MoreCarbonDioxideParagraph61.increase

alot增加了許多2.

burningoil

燃油3.thegreenhouseeffect

溫室效應(yīng)4.TheworditinParagraph5

refersto____.A.CO2

B.O3

C.O2

D.H2OBReadPara.5&6andchoose.3.Inthepassage,blanket

refersto____.A.carbondioxidearoundtheearthB.theozonelayerintheskyC.theforests

aroundtheworldD.pollutionallovertheworldAfewertreestrafficpollutionfactorypollutionbecomedeserts;disappeartheozonehole

morecarbondioxidepollutetheair;havehealthproblemspollutelandandwater;bedeadharmfulradiationreachestheearth,causecancergreenhouseeffect,levelofoceansrising,climatechangeproblemsandeffects1cReadandcompletethenotes.ProblemEffectontheenvironmentfewertreesforestsbecomedeserts,animalsandplantsdisappeartrafficpollution

greenhouseeffect,levelofoceansrising,climatechangecarsandbusespolluteair,healthproblemspollutelandandwater,riversandlakesdeadharmfulradiationreachestheearth,causecancerfactorypollution

ozonehole

moreCO2theozoneholefewertreesmoreco2trafficpollutionfactorypollutionAlltheseproblemsareveryserious,sowemustdosomethingnow.Supposeyouaretheearth,pleasegiveusaself-introduction.FewertreesTrafficpollutionFactorypollutionTheozoneholeMorecarbondioxide2SurftheInternettocollectmoreinformationaboutenvironmentalproblemsandeffects.Thendiscusstheinformationingroupsandtakenotes.Post-readingMakeaMindMapproblemsAsastudent,whatdoyouthinkyoucandotomakeourearthbeautifulinourdailylife?Groupwork:Writeaspeechtocallon(號(hào)召）peopletoprotectourenvironment.Youcanbeginlikethis:Ladiesandgentlemen,attentionplease!IamfromtheGreenOrganization._________________________________________________________________________________Sopleasejoinus!Thanksforyourattention!writing

Allovertheworld,peoplehavecutdownmillionsoftrees.Whenitrainsorwhenthewindblows,theearthistakenaway.Forestshavebecomedeserts,somanykindsofanimalsandplantsaredisappearing.____________________________________________________________________________________________________________________________________________________

_______________________________________________________________________effectsproblemsWeshouldplantmoretrees……whattodoBeforewriting

Asweallknow,waterpollutionisbecomingmoreandmoreserious.Somefactoriespourwastewaterintotherivers.Asaresult,itmakesthewaterdirtyandsmellterrible.Mostoffishinthewaterhavediedandwecan’tswiminthewater.Waterisveryimportanttohumanbeings,soweshoulddoourbesttoprotectandsaveit.Luckily,ourgovernmentistakingmeasurestoprotectthewaterfrompollution.Onepossibleversion:Welearn:1.somewords:

oxygen,