EvaluatechemicalfarmingandorganicfarmingUnit5WorkingtheLandUsingLanguage(2)Learningaims1.Integrateanddescribethedifferencesbetweenchemicalandorganicfarmingandtheirrespectiveadvantagesanddisadvantages.2.Analyzeandjudgetheauthor'swritingtechniques,learntomasterthemaindiscoursefeaturesofargumentation.3.Expresstheirviewsonchemicalfarmingororganicfarminginwrittenforminappropriatelanguage.Farmingproceduresploughing

sowingirrigatingfertilizing活動(dòng)一：感知與注意Whatkindoffertilizersdofarmersuse?ChemicalfertilizersNaturalwastefromanimals活動(dòng)一：感知與注意chemicalstrawberriesorganicstrawberries活動(dòng)一：感知與注意Chemicalapplesorganicapples活動(dòng)一：感知與注意chemicalgrapesorganicgrapes活動(dòng)一：感知與注意chemicalbananasorganicbananas活動(dòng)一：感知與注意OrganicFarmingToprotectthecrop,farmershavetokilloffthehamful_______.pestsChemicalfertilizershybridcornseedlesswatermelonAChemicalfertilizersBNaturalfertilizersNaturalwastefromanimalsanddeadplantsNow,whichonedoyouprefer?ABWhy?safefood

greenfood≈organicfood

safeornot?Whichtomatoesdoyouprefer?5yuan/kg30yuan/kgNormaltomatoesOrganictomatoesChemicalorOrganicFarming?Chemicalororganicfarming?Readthetext“Chemicalversusorganicfarming”andthenanswerthefollowingquestionsonpage56.

Questions活動(dòng)二：獲取與梳理1.Whydidmanyfarmerswelcometheintroductionofchemicalfarming?2.Whatconcernsmanypeopleabouttheuseofpesticides?3.Whatisoneproblemwiththeuseofchemicalfertilisers?Becauseitisagreatwaytofightcropdiseaseandincreaseproduction.Pesticidescandamagethelandbykillingnotonlyharmfulbacteriaandinsectsbutalsohelpfulones.Inaddition,thesechemicalscanstayinthesoilandundergroundwatersourcesforalongtime,whichaffectsthecropsgrownonthelandandanimalsandhumanswhodigestthem.Cropsgrownwithchemicalfertilisersusuallygrowtoofasttoberichinnutrition.Readthetext“Chemicalversusorganicfarming”andthenanswerthefollowingquestionsonpage56.

Questions活動(dòng)二：獲取與梳理4.Howisorganicfarmingdifferentfromchemicalfarming?5.Whydoorganicfarmerschangethekindofcropgrowninafieldeveryyear?6.Whatisthegoalofusingorganicfarmingmethods?Doyouthinkitcanbereached?Whyorwhynot?Organicfarmingissimplyfarmingwithoutusinganychemicals.Becausedifferentkindsofcropsputimportantmineralsbackintotheground,makingitreadyagainforthenextbatchofcrops.Thegoalofusingorganicfarmingmethodsistogrowgoodfoodwhileavoidingdamagetotheenvironmentortopeople’shealth.活動(dòng)三：概括與整合（MatchandComplete）1.Matchthemainideas(A-D)belowwiththeparagraphs.Thencompletethesentencesinthetables.ParagraphMainIdeaDetail1-2Pesticidescankillhelpful

SomepesticideshavebeenbecauseofCropsgrownwithchemicalfertilisersusually

tobe

fullof3Manyorganicfarmersuse

asfertiliser.4

Theyoftengrownineachfield

Theyalsoplantcropsthatuseofthesoiltohelp

keepitrich.5

OrganicfarmingisnowherenearabletomeetthehighTheproblemswithchemicalfarmingWhatorganicfarmingisOrganicmethodsforproducingrichsoilWhyman-madechemicalsarestillusedinfarmingbacteriaandinsects

prohibitedthe

damagetheycausetopeopleandtheenvironmentgrowtoofast

nutritionnaturalwastefromanimals

changethekindofcrop

everyyear

differentdepths

need/demandforfoodaroundtheworld

活動(dòng)四：分析與判斷(Howdoestheauthorwrite?）1.Theauthorusessomeconnectiveswhenexplainingthedetails.Findandunderlinethem.Thenthinkaboutwhattheyaddtothetext.Canyounamemoreconnectivesaccordingtodifferentclasses?Connectivesinthetext:and,also,but,while,however,forexample,forinstance,inaddition,infact,asfor,because,therefore2.Findthesubjectclausesusedinthetextandunderlinethem.Thenmakeyourownsentencesonthethemeofchemicalandorganicfarming.①Overtime,however,whatsomescientistshavefoundisthattheirlong-termusecansometimesharmboththelandandpeople’shealth.②Whydifferentcropsaregrownisbecausetheyputimportantmineralsbackintotheground,makingitreadyagainforthenextbatchofcrops.③

Whatkeepsthemfromdoingsoisthefactthatchemicalfarmingservesthehighdemandforfoodaroundtheworld.活動(dòng)五：內(nèi)化與運(yùn)用（Writeyourargumentativeessay）1.Discussthesequestionsingroups:?Istheauthorofthepassagefororagainstorganicfarming?Howdoyouknow??Whatotherdisadvantagesofchemicalfarmingdidtheauthornotlist？?Howmightthefollowingitemsbeproblemsandhowimportantaretheyfororganicfarming??Whatotherdisadvantagesoforganicfarmingcanyouthinkof?活動(dòng)五：內(nèi)化與運(yùn)用（Writeyourargumentativeessay）1.Decidetopicandcomeupwithmainpointstosupportyouropinion,andthenaddatleastonedetailtosupporteachmainpoint.Completetheoutlinebelow.活動(dòng)六：批判與評(píng)價(jià)（CriticalThinking）1.Usethechecklisttohelpyoureviewyourpartner’sdraft.Exchangeyourdraftwithapartner.√Doesthewriterdoagoodjo