IUnit5WorkingtheLandwriting班級姓名小組一、明確目標（2mins）學習目標1.Tounderstandthemeaningsanddifferencesbetweenchemicalandorganicfarmingandtheiradvantagesanddisadvantages;2.Tomastersometransitionalwordsorphrasesinthetext;3.Tolearnaboutthestructureofargumentativeessay;4.Towriteanessaytoexpressyourviewsonchemicalfarmingvsorganicfarming.獨立學習(15mins)Readthepassageon56andfinishthefollowingtasks.Task1:Trytoanswerthefollowingquestions.(5mins)1.Whydidmanyfarmerswelcometheintroductionofchemicalfarming?2.Whatconcernsmanypeopleabouttheuseofpesticides?

3.Whatisoneproblemwiththeuseofchemicalfertilisers?4.Howisorganicfarmingdifferentfromchemicalfarming?

5.Whydoorganicfarmerschangethekindofcropgrowninafieldeveryyear?6.Whatisthegoalofusingorganicfarmingmethods?Doyouthinkitcanbereached?Whyorwhynot?Keys:1.Manyfarmerswelcomedthemasagreatwaytofightcropdiseasesandincreaseproduction.2.Theirlong-termusecansometimesharmboththelandandpeople’shealth.3.Cropsgrownwiththemusuallygrowtoofasttoberichinnutrition.4.Organicfarmingissimplyfarmingwithoutusinganychemicals.Organicfarmersfocusonkeepingtheirsoilrichandfreeofdiseasesthroughnaturalmeans.5.Differentcropsaregrownbecausetheyputimportantmineralsbackintothegroundmakingitreadyforthenextbatchofcrops.6.Thegoalofusingorganicfarmingmethodsistogrowgoodfoodwhileavoidingdamagetotheenvironmentortopeople'shealth.Yes,Ithinkthisgoalcanbereachedbecausepeopletendtoliveagreenandhealthylifeandtheyneedorganicfarmingtodevelop.

三、同伴互助(5mins)Task:Ingroups,findtheadvantagesanddisadvantagesofchemicalfarmingtheauthorlisted.(para1para2)四、激情展示(5mins)Volunteersmakeapresentationreasonablywhileotherstudentsaresupposedtolistencarefully.Raisequestionsandtakenotestimely.___________________________________________________________________________________總結提升(3mins)AdvantagesofOrganicFarmingComparedtochemicalfarming,organicfarmingenjoysitsoverwhelmingsuperiority.Thereasonsareasfollows.Firstly,organicfoodishealthierandsaferasinorganicfarming,poisonouschemicalslikepesticidesareforbiddenfrombeingusedoncrops.Furthermore,organicfarmingisenvironmentallyfriendly.Forinstance,organicfarmersusenaturalwastefromanimalsasfertilizer,whichisharmlesstotheenvironment.Lastly,farmerscanincreasetheirincomethroughorganicfarming.Aspeopletendtopursueagreenlife,theyaremorelikelytobuyorganicfruitandvegetablesdespitethehighprices.Withincomparableadvantages,therefore,organicfarmingisexpectedtobenefitmorepeopleinthefuture.達標測評(10mins)P1______________________________________(化學農藥和人工肥料)havebeeninwidespreaduseinfarmingsincethemiddleofthe20thcentury.Whentheywerefirstintroduced,manyfarmerswelcomedthemasagreatwayto_________________________________________(抵御作物病害、增加產量).Overtime,however,whatsomescientistshavefoundisthat____________________________________________________________________(它們的長期使用有時會危害土地和人類健康).Keys:Chemicalpesticidesandartificialfertilizers;Chemicalpesticidesandartificialfertilizers;theirlong-termusecansometimesharmboththelandandpeople’shealthP2Forexample,pesticidescandamagethelandby__________________________________________________________________(不僅殺死有害細菌和昆蟲，還殺死那些有益的).Inaddition,thesechemicalscanstayinthe____________________（土壤和地下水源中）foralongtime.Thisaffectsthecropsgrownonthelandand,_____________，（相應地）theanimalsandhumanswho________________________(消化這些作物).Manypeopleworrythatthesechemicalsmay____________(致病)andeven_____________(引發癌癥).Infact,somepesticideslikeDDThavebeenprohibitedinmostcountriesbecauseofthedamagetheycausetopeopleandtheenvironment.Asforchemicalfertilizers,cropsgrownwiththemusually____________________________(生長過快而營養不足).Theymaylookbeautifulontheoutside,butinsidethereisusuallymorewaterthan______________(必需礦物質),andtheyoften____________(口感較差)aswell.Keys:killingnotonlyharmfulbacteriaandinsects,butalsohelpones;soilandundergroundwatersources;inturn;digestthem;makethemill;causecancer;growtoofasttoberichinnutrition;essentialminerals;havelessflavorP3_________________(作為一種替代方法),somefarmershaveswitchedto_____________(有機耕作),andmanycustomershaveturnedto__________(有機食品)whentheyshopatthelocalgrocery.Organicfarmingissimplyfarming___________________________(不使用任何化學品).Organicfarmersfocuson___________________(使土壤保持肥沃）and__________________(沒有病害)through___________(自然的方法）.Forexample,manyorganicfarmersuse________________（天然的牲畜糞便）asfertilizer.Thismakesthesoilintheirfields_____________________________(更富含礦物質).Italsokeepstheair,soil,water,andcropsfreeofchemicals.Keys:Asanalternative;Asanalternative;organicfood;withoutusinganychemicals;keepingtheirsoilrich;freeofdisease;naturalmeans;naturalwastefromanimals;richerinmineralsP4Organicfarmersalsousemanyothermethodstoproduce_____________（肥沃的土壤）.Theyoften_____________________________________________(每年更換每塊農田種植的作物種類).Forinstance,theymay_______________（種植玉米或小麥）inafieldoneyear,andthengrowbeanstherethenext.Whydifferentcropsaregrownisbecausethey__________________________（把重要的礦物質重新放回土壤）,makingitreadyforthenextbatchofcrops.Organicfarmersalso____________（種植多樣化的莊稼）thatusedifferentdepthofsoiltohelpkeepitrich.Forexample,peanuts_____________（長在地表）,butmanyothervegetables_______________（扎根于土壤深）.Thegoalofusingdifferentorganicfarmingmethodsisto________________________________________________(生產優質食物，同時避免損害環境和人類健康).Keys:richsoil;changethekindofcropgrownineachfieldeveryyear;growcornorwheat;putimportantmineralsbackintotheground;plantdiversecropsthatusedifferent;growontheground’ssurface;putdowndeeproots;growgoodfoodwhileavoidingdamagetotheenvironmentortopeople’shealth.P5Somepeoplewouldprefertostoptheuseofman-madechemicalsinagricultureentirely.Whatkeepsthemfromdoingsoisthefactthatchemicalfarming____________________________(滿足對食物的高要求)aroundtheworld.Organicfarmingisnowherenearabletomeetthatneed.Therefore,_____________________________________（想要找到一個合適的解決方案仍然還有很長的路走）thatputssufficientfoodonthedinnertable_____________________________________________（同時讓人和環境盡可能的保持健康).Keys:servesthehighdemandforfood;thereisstill