Unit+5+Working+the+Land+Using+Language+課件-【知識(shí)精講精研】高二英語(yǔ)人教版（2019）選擇性必修第一冊(cè)

UNIT5WORKINGTHELAND

UsingLanguage:

chemicalversusorganicfarmingLearningobjectivesInthisclasswewill:Toknowthemeaningsofchemicalfarmingandorganicfarming.Toknowtheadvantagesanddisadvantagesofbothchemicalfarmingandorganicfarming.Tomastersometransitionalwordsorphrasesinthetext.Toexpressopinionsonchemicalfarmingandorganicfarming,andwriteanargumentativeessay.Matchthemainideas(A-D)belowwiththeparagraphs.AWhatorganicfarmingisBWhyman-madechemicalsarestillusedinfarmingCOrganicmethodsforproducingrichsoilDTheproblemswithchemicalfarmingPara.1-2Para.3Para.4Para.5DACBReadandThink(organization)Title

Texttype:Argumentation

The_______and_________ofchemicalfarming.benefitsproblemsPart1:(Para1&2)

Whatorganicfarmingisand__________________.howitkeepsthesoilrichPart2:(Para3&4)

Part3:(Para5)Conclusion

Completethesentencesinthetable.Para1-2345Pesticidescankillhelpful___________________.Somepesticideshavebeen__________becauseofthe_________________.Cropsgrownwithchemicalfertilisersusually_______________tobefullof_________.Manyorganicfarmersuse________________________asfertiliser.Theyoften____________________grownineachfield__________.Theyalsoplantcropsthatuse______________ofthesoiltohelpkeepitrich.Organicfarmingisnowherenearabletomeetthehigh___________________________.bacteriaandinsectsprohibiteddamagetheycausegrowtoofastnutritionnaturalwastefromanimalschangethekindofcropeveryyeardifferentdepthsdemandforfoodaroundtheworld1.Whydidmanyfarmerswelcometheintroduction

ofchemicalfarming?

2.Whatconcernsmanypeopleabouttheuseof

pesticides?

Para.13.Whatisoneproblemwiththeuseofchemical

fertilisers?

Para.24.Howisorganicfarmingdifferentfromchemicalfarming?

Para.35.Whydoorganicfarmerschangethekindof

cropgrowninafieldeveryyear?Differentcropsaregrownbecausetheyput

importantmineralsbackintotheground,makingitreadyforthenextbatchofcrops.Para.46.

Whatisthegoalofusingorganicfarmingmethods?

Do

youthinkitcanbereached?Whyor

whynot?

Para.4WhatwordsandexpressioninParagraph2showthetransitionsbetweenideas?12Step4:ReadingforlanguageWhatwordsandexpressioninParagraph2showthetransitionsbetweenideas?13Step4:ReadingforlanguageWriteanargumentativeessaygivingyouropiniononchemical/organicfarming1415Howmightthefollowingitemsbeproblemsandhowimportantaretheyfororganicfarming?Disadvantages?Advantage?Step6:Pre-writingchemicalfarmingThinkingorganicfarmingadvantagesdisadvantagesfightcropdiseaseincreaseproductionlowercostcropslookbeautifuloutside......goodfoodavoidingdamagetotheenvironmentortopeople'shealth......harmthelandharmpeople’shealthharmtheenvironmentcropsarelessinnutrition......cannotmeetthedemandforfoodmoreeffortsandhighercostsmellygases......Writingtask:Supportorganicfarming/chemicalfarming?17Brainstorm—organization1ArgumentPoint1Point2Point3ConclusionPart1Part2…Part3detailsdetailsdetailsdetailsRecently,wehavehadaheateddiscussionabout____________.Differentpeople,however,havedifferentopinionsonthismatter.Some

people

are

in

favourof

/agree/

support_______.Theythinkitcan________.Moreover,it_____________________However,somepeopleareagainstit.Theyarguethat__________.What’smore,...asfarasIamconcerned,I’mconvincedthat___________.Because__________,…….Then……..PossibleversionInmyopinion,organicfarmingispreferabletochemicalfarmingbecauseofthebenefitstotheenvironmentandtopeople,andbecauseorganicfoodismorenutritious.Tobeginwith,chemicalfarmingharmstheenvironment.Sincechemicalpesticidesarenotfoundinnature,normalnaturalprocessescannotgetridofthem.Instead,thechemicalstendtoaccumulateinthesoilandwater,andareabsorbedinthefoodchain,wheretheypoisonwildlifeanddomesticanimals.20PossibleversionThisaffectsusdirectly,becauseweendupeatingplants,dairyproducts,eggs,andmeatthathavehighlevelsofpesticides.Thinkaboutit:Thepurposeofthepesticidesistokill“pests”,thatis,tokillinsects.Somethingthatcankillaninsectprobablyisnothealthyforapersontoeat.Whileitmaybetruethatthefoodweeatdoesnothaveenoughpesticidesinittokillusimmediately,overtheyearsthispesticidemaycauseushealthproblemsorgiveusdiseasessuchascancer.21Finally,organicfoodisgenerallymorenutritiousthanfoodgrownwithman-madechemicals.Ifyourememberafewyearsago,therewasthecaseofwatermelonsliterallyexplodinginthefieldsbecausetheyhadbeengivenchemicalstomakethemgrowfaster.Thereasonwhytheyexplodedwasthattheycontainedtoomuchwater,becausethefarmershadusedtoomanychemicalsandtheweatherwasunusuallywet.Asitturnsout,suchchemicalsarecommonlyusedinfarmingtogrowlargercropsmorequickly.Doyoureallywanttoeatwatered-downfruitandvegetableswhichhavebeenrushedtomarket?Theycannotpossiblytasteasgoodasorganicvegetables,norcantheybeasnutritious.Inclosing,Iwouldliketosuggestbuyingorganicfood.Yes,thepriceisalittlehigher?Butthesmallpricewepayextrawillbringushugerewardsintheend.221.chemicalpesticides2.artificialfertiliser3.beinuseinsth.4.long-termuse5.overtime6.organicfarming化學(xué)農(nóng)藥人工肥料在..應(yīng)用中長(zhǎng)期使用隨著時(shí)間推移有機(jī)耕種Para1phra