Unit5 Using Language2 名师课件-许丽君

Unit5WorkingtheLandUsingLanguage

(2)ChemicalVersusOrganicFarming杭州二中许丽君Learningobjectives1.knowthedifferencebetweenchemicalfarmingandorganicfarming.2.workoutthecontent,structureandlanguagefeaturesofthetext;3.knowthewritingskillsofanargumentativeessay,suchasillustrating,givingexamplesormakingcontrast;4.writeyouropinioninanessayaboutchemicalfarmingororganicfarming.Bytheendofthisperiod,studentswillbeableto…organicfarmingchemicalfarmingorganicfarmingorganicfarmingchemicalfarmingorganicfarmingMakeajudgement:whichischemicalfarmingandwhichisorganicfarming.Pre-readingItisfertilizer.

Whatisthesubstanceweputonthesoiltomakecropsgrow?Whatkindoffertilizersdofarmersuse?chemicalfertilizersnaturalfertilizersPre-readingNaturalwastefromanimalsanddeadplantsWhat’retheadvantagesoforganicfarming?Doyouusuallyeatorganicfood?Doyouthinkorganicfoodaremorehealthy?Whatarethedisadvantagesofusingchemicalfertilizers?OrganicFarmingThink＆discussPre-reading:Pre-reading:predictionCHEMICALVERSUS

ORGANICFARMINGReadthetext,checkyourpredictionandanswerthequestions:Whatischemicalfarming?Whatisorganicfarming?

Task1

整体理解

while-reading:A.WhatorganicfarmingisB.Whyman-madechemicalarestillusedinfarmingC.OrganicmethodsforproducingrichsoilD.TheproblemswithchemicalfarmingPara.

1-2

Para.3

Para.4

Para.5

ReadthetextandthenMatchthemainideawitheachparagraph.ChemicalfarmingOrganicfarmingThinkingwhile-reading:ChemicalfarmingVsOrganicfarmingChemicalfarmingorganicfarmingadvantagedisadvantagesadvantagesdisadvantageMychoice/attitudewhile-reading:1.Whydidmanyfarmerswelcometheintroductionofchemicalfarming?Advantages:Manyfarmerswelcomedthemasagreatwaytofightcropdiseaseandincreaseproduction.while-reading:(Para1)2.Whatconcernsmanypeopleabouttheuseofpesticides?

Disadvantages:Theirlong-termusecansometimesharmboththelandandpeople’shealth.while-reading:(Para1)3.Whatisoneproblemwiththeuseofchemicalfertilisers?(Para2)

Disadvantages:Cropsgrownwiththemusuallygrowtoofasttoberichinnutrition.while-reading:(Para2)chemicalfarmingAdvantagesDisadvantages

1.2.harmingtheland:killingharmful__________________aswellas_____________harmingpeople’shealth:Thesechemicalsmaymakepeople_____andeven_______________Cropsgrowtoofasttobe___________________.bacteriaandinsectsthehelpfulonesillrichinnutritioncausecancerfight

cropdiseaseincreaseproduction(Para.1-2)while-reading:Asanalternative,I’dliketoswitchtoorganicfarming!Whatisorganicfarmingandhowisitdifferentfromchemicalfarming?Organicfarmingissimplyfarmingwithoutusinganychemicals.Organicfarmersfocusonkeepingtheirsoilrichandfreeofdiseasethroughnaturalmeans.while-reading:Para 3Whataretheorganicmethodsmentionedinthetext?1.usenaturalwastefromanimalsasfertilizer.2.changethekindofcropgrownineachfieldeveryyear.3.plantdiversecropsthatusedifferentdepthofsoiltokeepitrich.while-reading:(Para3&4)usenaturalwastefromanimalsasfertilizerchangethekindofcropgrownineachfieldeveryyear.toputimportantmineralsbackintothegroundtomakethesoilinthefieldsricherinmineralsplantdiversecropsthatusedifferentdepthofsoiltokeepitrich.tokeepthesoilrichMethods

Purposes

Matchthemethodswithitspurpose(Para3&4)while-reading:while-reading:What'sthegoalofusingdifferentorganicfarmingmethods?Thegoalofusingdifferentorganicfarmingmethodsistogrowgoodfoodwhileavoidingdamagetotheenvironmentortopeople'shealth.（Para.4）while-reading:（Para.5）Whycan’twestoptheuseofman-madechemicalsinagricultureentirely?A.Organicfarmingcostusalotofmoney.B.Organicfarmingcanmeetpeople’sneed.C.Chemicalfarmingbroughtushugeprofit.D.Chemicalfarminghelpsservetheneedforfood.while-reading:bacteriaandinsectsprohibiteddamagetheyusegrowtoofastnutritionnaturalwastefromanimalseveryyeardifferentdepthsdemandforfoodaroundtheworldchangethekindofcropwhile-reading:DivideandsummarizePart1:para1¶2Part2:para3Part3:para4Part4:para5TheproblemswithchemicalfarmingWhatorganicfarmingisOrganicmethodsforproducingrichsoilWhyman-madechemicalsarestillusedinfarmingPesticidescankillhelpful__________.Somepesticideshavebeen_________becauseofthe_________________.Cropsgrownwithchemicalfertilisersusually_____________tobefullof___________bacteriaandinsectsprohibiteddamagetheycausedgrowtoofastnutritionManyorganicfarmersuse_________________________asfertilisernaturalwastefromanimalsThey

often____________________

grown

in

each

field______________

They

also

plant

cropsthat

use_______________ofthe

soil

to

help

keep

it

rich.changethekindofcropeveryyeardifferentdepthsOrganic

farming

is

nowhere

near

able

to

meet

the

high___________________DemandforfoodaroundtheworldⅠ.阅读课文，判断信息正误(

)1.Chemicalpesticidesandartificialfertiliserscanfightcropdiseaseandincreaseproduction.(

)2.Pesticidescandamagethelandbyonlykillingharmfulbacteriaandinsects.(

)3.Chemicalfertilisersmakecropsgrowfasttoberichinnutrition.(

)4.Organicfarmerskeeptheirsoilrichandfreeofdiseasethroughnaturalmeans.(

)5.Organicfarmingservesthehighdemandforfoodaroundtheworld.【答案】1－5

TFFTFwhile-reading:Ⅱ.阅读课文，选择正确选项(

)1.Whydidmanyfarmerswelcometheintroductionofchemicalfarming?A．Theycanfightcropdiseaseandincreaseproduction.B．Theyharmboththelandandpeople’shealth.C．Theycanhelpproducerichsoil.D．Theyarenotexpensive.A

(

)2.Whatconcernsmanypeopleabouttheuseofpesticides?A．Pesticidescandamagetheland.B．Chemicalscanstayinthesoilforalongtime.C．Pesticidescankillharmfulbacteriaandinsects.D．Chemicalsmaymakepeopleillandevencausecancer.D

while-reading:(

)3.Whydoorganicfarmerschangethekindofcropgrownineachfieldeveryfewyears?A．Ithelpsputimportantmineralsbackintotheground.B．Itcanavoiddamagetotheenvironment.C．Itcanhelpincreaseoutput.D．Thewriterdidn’ttellus.A

(

)4.Whycan’twestoptheuseofman-madechemicalsinagricultureentirely?A．Organicfarmingcostusalotofmoney.B．Organicfarmingcanmeetpeople’sneed.C．Chemicalfarmingbroughtushugeprofit.D．Chemicalfarminghelpsservetheneedforfood.D

while-reading:Post-reading:Benefits—Problems—SolutionsFarmingBenefit

ProblemSolutionChemicalfarming

Organicfarmingfightcropdiseaseandincreaseproductionsometimesharmboththelandandpeople’shealthswitchtoorganicfarmingmakethesoilrich;keeptheair,soil,waterandcropsfreeofchemicalscannotmeettheneedstillalongwaytofindasuitablesolutionFillinthetableaccordingtothepassage【完美成篇】

Intermsofthedevelopmentofmodernagriculture,chemicalagricultureandorganicagriculturearetwokeywords,overwhichtherearevariousopinions.

Itisobviousthatusingchemicalfertilisershasmanydisadvantages.Aboveall,thereisnodoubtthatthechemicalsstayinginsidethecropscanleadtocancerorotherillnesses.Besides,thevegetablesgrowsofastthattheycontainlittlenutrition.

Organicfoodsarebecomingincreasinglypopularwithcustomers.Therearemanyreasonsforthis.Thefirstoneisthataspeoplearericher,theyattachgreatimportancetohealth.Secondly,organicproducesimplyusesnaturalfertilisers,makingvegetablesandfruittastyandnutritive.Moreover,theproducegrowsincleanwaterandneverusespesticides,whichisbeneficialforourhealth.Asasayinggoes,healthisthefirstwealth,soitiswisertochooseorganicfood.Post-reading:Rereadthepassageandfillintheblanks.

Withthedevelopmentofsociety,chemicalpesticidesandartificialfertilisershavebeenin(1)__________useinfarmingformanyyears.Theycanhelpfightcrop(2)_______andincreaseproduction.However,theycancausemanyproblems(3)______.Forinstance,pesticidescankill(4)_______bacteriaandinsectsandcropsgrownwithchemicalfertilisersusuallygrow(5)_______tobefullofnutrition.Asaresult,manypeopleworrytheymaymakethemillandevencausecancer.

widespreaddiseaseaswellhelpfultoofastTotacklethisproblem,farmersusenaturalwasteas(6)________andtheyoftenchangethekindofcropgrownineachfieldeveryyearandtheyalsoplantdiversecropsthatusedifferent(7)______ofsoiltohelpkeepitrich.Butorganicfarmingisnowherenearableto(8)_____thehighdemandforfood.Therefore,thereisstillalongwaytofinda(9)_______solutionthatputssufficientfoodonthedinnertablewhilekeepingpeopleandtheenvironmentas(10)_______aspossible.fertiliserdepthsmeetsuitablehealthyⅡ.概要写作(根据教材语篇内容写一篇60词左右的内容概要)参考范文Thoughchemicalpesticidesandartificialfertilisershavebeenusedwidelyintheworld,(要点1)scientistsfoundusingthemforlongcanharmthelandandpeople’shealthaswell.(要点2)Tosolvetheproblem,organicfarmingcomesintobeing.(要点3)However,organicfarmingcan’tmeetthehighdemandforfoodaroundtheworld,soasuitablesolutionwillhavetobefound.(要点4)Post-reading:发表议论就是通过议论或说理来表达作者的见解和主张，作者对某一问题持有一种看法，为了