Unit 5 Working the Land Using Language 课件-高中英语人教版（2019）选择性必修第一册

Unit5WorkingtheLand：UsingLanguageLearningobjectivesInthisclasswewill:Toknowthemeaningsofchemicalfarmingandorganicfarming.Toknowtheadvantagesanddisadvantagesofbothchemicalfarmingandorganicfarming.Tomastersometransitionalwordsorphrasesinthetext.Toexpressopinionsonchemicalfarmingandorganicfarming,andwriteanargumentativeessay.Whatarethefarmersdoing?Theyarefertilisingthecrops.Whatkindsoffertilisersdotheyuse?organicfertiliserchemicalfertiliserNow,let'sreadatexttofindtheanswer.Whatkindoffarmingaretheydoing?OrganicfarmingChemicalfarmingWhat'sthemainideaofthetext?Thetextmainlytalksaboutchemicalfarmingandorganicfarming.________________cancausemanyproblems,asanalternative,somepeopleswitchto________________.ChemicalfarmingorganicfarmingOrganicfarmingissimplyfarmingwithoutusinganychemicals.1.Whatischemicalfarming?2.Whatisorganicfarming?Skimthetext,andthenanswerthefollowingquestions.Chemicalfarmingisfarmingusingchemicalpesticidesandartificialfertilisers.Readthetext,andthenanswerthefollowingquestions.1.Whydidmanyfarmerswelcometheintroductionofchemicalfarming?2.Whatconcernsmanypeopleabouttheuseofpesticides?3.Whatisoneproblemwiththeuseofchemicalfertilisers?4.Howisorganicfarmingdifferentfromchemicalfarming?5.Whydoorganicfarmerschangethekindofcropgrowninafieldeveryyear?6.Whatisthegoalofusingorganicfarmingmethods?Doyouthinkitcanbereached?Whyorwhynot?P5511.Whydidmanyfarmerswelcometheintroductionofchemicalfarming?Manyfarmerswelcomedthemasagreatwaytofightcropdiseasesandincreaseproduction.2.Whatconcernsmanypeopleabouttheuseofpesticides?Theirlong-termusecansometimesharmboththelandandpeople'shealth.3.Whatisoneproblemwiththeuseofchemicalfertilisers?Cropsgrownwiththemusuallygrowtoofasttoberichinnutrition.4.Howisorganicfarmingdifferentfromchemicalfarming?Organicfarmingissimplyfarmingwithoutusinganychemicals.Organicfarmersfocusonkeepingtheirsoilrichandfreeofdiseasesthroughnaturalmeans.5.Whydoorganicfarmerschangethekindofcropgrowninafieldeveryyear?Differentcropsaregrownbecausetheyputimportantmineralsbackintotheground,makingitreadyforthenextbatchofcrops.6.Whatisthegoalofusingorganicfarmingmethods?Doyouthinkitcanbereached?Whyorwhynot?Thegoalofusingorganicfarmingmethodsistogrowgoodfoodwhileavoidingdamagetotheenvironmentortopeople'shealth.Yes,Ithinkthisgoalcanbereached.Farmersworkedforcenturieswithoutusinganykindsofchemicalsandwithoutharmingtheenvironment,andthefoodtheyproducedwasjustfine.Matchthemainideas(A-D)belowwiththeparagraphs.Thencompletethesentencesinthetable.P562A.WhatorganicfarmingisB.Whyman-madechemicalsarestillusedinfarmingC.OrganicmethodsforproducingrichsoilD.TheproblemswithchemicalfarmingPara.MainideaDetail1-2Pesticidescankillhelpful__________________.Somepesticideshavebeen__________becauseofthe__________________.Cropsgrownwithchemicalfertilisersusually_____________

tobefullof______________.3Manyorganicfarmersuse_________________________asfertiliser.4Theyoften_____________________grownineachfield__________.Theyalsoplantcropsthatuse_______________

ofthesoiltohelpkeepitrich.5Organicfarmingisnowherenearabletomeetthehigh________________________________.bacteriaandinsectsprohibiteddamagetheycausegrowtoofastnutritionnaturalwastefromanimalschangethekindofcropeveryyeardifferentdepthsdemandforfoodaroundtheworldDACBchemicalfarmingThinkingorganicfarmingadvantagesdisadvantagesfightcropdiseaseincreaseproductionlowercostcropslookbeautifuloutside......goodfoodavoidingdamagetotheenvironmentortopeople'shealth......harmthelandharmpeople’shealthharmtheenvironmentcropsarelessinnutrition......cannotmeetthedemandforfoodmoreeffortsandhighercostsmellygases......Para1:howeverPara2:forexample,inaddition,inturn,infact,asfor,but,and,aswellReadfortransitionalwords&phrasesPara3:asanalternative,forexample,alsoPara4:also,forinstance,forexample,butPara5:thereforeargumentativewritingmeupwiththreemainpointstosupportyouropinion,andthenaddatleastonedetailtosupporteachmainpoint.WritingTopicsentence:

Inmyopinion,___farmingispreferableto__farmingbecause______.Point1:________________Detail:_________________Point2:________________Detail:_________________Point3:

________________Detail:__________________Conclusion:__________________________________________

chemicalfarmingVSorganicfarmingexpressyouropinions:Inmyeyes…I’mopposedto…I’dprefer…because…Frommypointofview,…WhatIfirmlybelieveinisthat…makeaconclusion:Insummary,Inaword,…Allinall,…Tosumup,…WritingWriteanargumentativeessaygivingyouropiniononchemicalororganicfarming.1.Istheauthorofthepassagefororagainstorganicfarming?Howdoyouknow?2.Whatotherdisadvantagesofchemicalfarmingdidtheauthornotlist?3.Howmightthefollowingitemsbeproblemsandhowimportantaretheyfororganicfarming?

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naturalanimalwasteusedasfertiliser

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highercostofproducingfood

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greatereffortrequiredtofarm4.Whatotherdisadvantagesoforganicfarmingcanyouthinkof?P5731.Discussthesequestionsingroups.2.Decidewhetheryourgroupsupportschemicalfarmingororganicfarming.Comeupwiththreemainpointstosupportyouropinion,andthenaddatleastonedetailtosupporteachmainpoint.Completetheoutlinebelow.Topicsentence:

Inmyopinion,_________farmingispreferableto_________farmingbecause_________________________________.Point1:__________________________________________________(Detail)____________________________________________Point2:__________________________________________________(Detail)____________________________________________Point3:__________________________________________________(Detail)____________________________________________Conclusion:

_______________________________________________P573

Inmyopinion,organicfarmingispreferabletochemicalfarmingbecauseofthebenefitstotheenvironmentandtopeople,andbecauseorganicfoodismorenutritious.

Tobeginwith,chemicalfarmingharmstheenvironment.Sincechemicalpesticidesarenotfoundinnature,normalnaturalprocessescannotgetridofthem.Instead,thechemicalstendtoaccumulateinthesoilandwater,andareabsorbedinthefoodchain,wheretheypoisonwildlifeanddomesticanimals.

Thisaffectsusdirectly,becauseweendupeatingplants,dairyproducts,eggs,andmeatthathavehighlevelsofpesticides.Thinkaboutit:Thepurposeofthepesticidesistokill“pests”,thatis,tokillinsects.Somethingthatcankillaninsectprobablyisnothealthyforapersontoeat.Whileitmaybetruethatthefoodweeatdoesnothaveenoughpesticideinittokillusimmediately,overtheyearsthispesticidemaycauseushealthproblemsorgiveusdiseasessuchascancer.3.Useyouroutlinetowriteashortessaygivingyouropiniononthetopic.P573

Finally,organicfoodisgenerallymorenutritiousthanfoodgrownwithman-madechemicals.Ifyourememberafewyearsago,therewasthecaseofwatermelonsliterallyexplodinginthefieldsbecausetheyhadbeengivenchemicalstomakethemgrowfaster.Thereasonwhytheyexplodedwasthattheycontainedtoomuchwater,becausethefarmershadusedtoomanychemicalsandtheweatherwasunusuallywet.Asitturnsout,suchchemicalsarecommonlyusedinfarmingtogrowlargercropsmorequickly.Doyoureallywantto