Unit 5 Using language (2) 课件 【基础梳理+考点探究】人教版高中英语选择性必修第一册

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

sowingirrigatingfertilizing活动一：感知与注意Whatkindoffertilizersdofarmersuse?ChemicalfertilizersNaturalwastefromanimals活动一：感知与注意chemicalstrawberriesorganicstrawberries活动一：感知与注意Chemicalapplesorganicapples活动一：感知与注意chemicalgrapesorganicgrapes活动一：感知与注意chemicalbananasorganicbananas活动一：感知与注意OrganicFarmingToprotectthecrop,farmershavetokilloffthehamful_______.pestsChemicalfertilizershybridcornseedlesswatermelonAChemicalfertilizersBNaturalfertilizersNaturalwastefromanimalsanddeadplantsNow,whichonedoyouprefer?ABWhy?safefood

greenfood≈organicfood

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

Questions活动二：获取与梳理1.Whydidmanyfarmerswelcometheintroductionofchemicalfarming?2.Whatconcernsmanypeopleabouttheuseofpesticides?3.Whatisoneproblemwiththeuseofchemicalfertilisers?Becauseitisagreatwaytofightcropdiseaseandincreaseproduction.Pesticidescandamagethelandbykillingnotonlyharmfulbacteriaandinsectsbutalsohelpfulones.Inaddition,thesechemicalscanstayinthesoilandundergroundwatersourcesforalongtime,whichaffectsthecropsgrownonthelandandanimalsandhumanswhodigestthem.Cropsgrownwithchemicalfertilisersusuallygrowtoofasttoberichinnutrition.Readthetext“Chemicalversusorganicfarming”andthenanswerthefollowingquestionsonpage56.

Questions活动二：获取与梳理4.Howisorganicfarmingdifferentfromchemicalfarming?5.Whydoorganicfarmerschangethekindofcropgrowninafieldeveryyear?6.Whatisthegoalofusingorganicfarmingmethods?Doyouthinkitcanbereached?Whyorwhynot?Organicfarmingissimplyfarmingwithoutusinganychemicals.Becausedifferentkindsofcropsputimportantmineralsbackintotheground,makingitreadyagainforthenextbatchofcrops.Thegoalofusingorganicfarmingmethodsistogrowgoodfoodwhileavoidingdamagetotheenvironmentortopeople’shealth.活动三：概括与整合（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

活动四：分析与判断(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.活动五：内化与运用（Writeyourargumentativeessay）1.Discussthesequestionsingroups:•Istheauthorofthepassagefororagainstorganicfarming?Howdoyouknow?•Whatotherdisadvantagesofchemicalfarmingdidtheauthornotlist？•Howmightthefollowingitemsbeproblemsandhowimportantaretheyfororganicfarming?•Whatotherdisadvantagesoforganicfarmingcanyouthinkof?活动五：内化与运用（Writeyourargumentativeessay）1.Decidetopicandcomeupwithmainpointstosupportyouropinion,andthenaddatleastonedetailtosupporteachmainpoint.Completetheoutlinebelow.活动六：批判与评价（CriticalThinking）1.Usethechecklisttohelpyoureviewyourpartner’sdraft.Exchangeyourdraftwithapartner.√Doesthewriterdoagoodjo