M4U2-chemical-or-organic-farmingPPT学习课件

LOGOUnit2WorkingtheLandChemicalorOrganicFarming?BySkyWang1LOGOInthisunitwehavelearntaboutagreatman,doyoustillrememberwhoheis?StepⅠ.Leading-in2LOGOYuanLongping-------FatherofHybridRice3LOGOSuperhybridriceWhatishisachievement?4LOGOCanyouthinkofotherwaystoincreaseourcropharvest?Whatmakescropsgrowfaster&better?StepⅡ.Brainstorm5LOGOItisfertilizer.6LOGOfertilizerHowmanykindsoffertilizersdoyouknow?Therearetwokinds.chemicalfertilizersnaturalfertilizers7LOGOchemicalfarmingorganicfarmingchemicalfertilizersnaturalfertilizersBetter？8LOGOChemicalororganicfarming?P14.StepⅢ.Reading9LOGOReadthepassagequicklyandtrytofindoutthemainideaoftheeachparagraph.*Payattentiontothekeyword(s)ineachparagraph.Task1.Skimming10LOGOD.Long-termuseofchemicalfertilizerscancausedamagetothelandandpeople’shealth.C.Problemscausedbychemicalfertilizers.P1.P2.B.Farmersandcustomersturntoorganicfarming.A.Othermethodstokeepthesoilfertile.P3.P4.Mainideaoftheeachparagraph.11LOGOChemicalfertilizerscancausemanyproblems,soorganicfarmingisbecomingmorepopular.Organicfarmingmeansgrowingcropswithnaturalfertilizer.Theorganicfarmerskeepthesoilrichandhealthy.Themainideaofthetext:12LOGOTask2.Carefulreading1.Listentothetapeandpayattentiontothepronunciation.2.Underlinetheusefulandimportantwordsandexpressions.13LOGO1.WhichstatementisWRONGaccordingtothetext?A.Allcropsareorganic.B.Recently,theterm“organicfarming”hasgainedanothermeaning.C.Allfarmersusefertilizers.D.Scientistsbelievesomechemicalfertilizersarebetterforpeople.D2.1.Choosethebestanswer.14LOGO2.WhichisNOTthereasonwhyorganicfarmersprefernaturalwastefromanimals?A.Itcankeepthefoodfreefromchemicals.B.Itcankeeptheair,soilandwaterfreefromchemicals.C.Itcankillharmfulpests.D.Itcanmakethesoilricherinmineral.C15LOGO3.Whatistheadvantageofusingchemicalfertilizers?A.Leavingchemicalsinthegroundforalongtimeisgoodforwatersupply.B.Theycangetthesoilexhausted.C.Theycankillhelpfulbacteria.D.Theycankillharmfulpest.D16LOGO4.Theorganicfarmersdothefollowingsexcept______.A.addingfertilizerswhichisrichinmineralB.changingcropseverytwoorthreeyearsC.plantingseedsindifferentlayersofthesoilD.plantinggrassbetweencropstopreventthesoilfrombeingblownawayA17LOGO1.Whyarechemicalfertilizerssopopularinfarmingtoday?2.Whatproblemscanbecausedbyusingchemicalfertilizers?3.Whatisorganicfarming?4.Whatisthemainreasonforusingorganicfarmingmethods?2.2.Answerthefollowingquestions.(P14.Ex.1)18LOGO1.Whyarechemicalfertilizerssopopularinfarmingtoday?Theyareagreatwaytostopcropdiseaseandincreaseproduction.19LOGO2.Whatproblemscanbecausedbyusingchemicalfertilizers?Theycandamagethelandbykillinghelpfulbacteriaandpetsandbystayinginthegroundandundergroundwaterforalongtime.Theydamagepeople’shealthbybuildingupintheirbodiesandleadingtocancerorotherillnesses.20LOGO3.Whatisorganicfarming?Organicfarmingmeansgrowingcropswithoutusinganychemicals.21LOGOThemainreasonforusingorganicfarmingmethodsistogrowgoodfoodandtoavoiddamagingtheenvironmentorpeople’shealth.4.Whatisthemainreasonforusingorganicfarmingmethods?22LOGOInrecentdays,scientistshavediscoveredthatusing________fertilizersforalongtimecanhurtthelandandalsopeople's_______.Thereareseveral__________causedbychemicalfertilizers.Theyhurtthehealthoftheland,_____inthewaterforalongtimeandgetintopeople's________throughtheirfood.chemicalbodiesproblemshealthstayFillintheblanksaccordingtothepassage.StepⅣ.Retelling&Summary23LOGO________farmingisbecomingmorepopularwithsomefarmersandmany_________afterthesediscoveriescameout.Organicfarmingdoesnotuseanychemicals.Therearemanyorganicfarming_________formakingthelandhealthyandproductive.Allofthesemethodstrytoproducegoodfoodandtokeepthe_____________andpeople________.methodshealthyenvironmentcustomersOrganic24LOGOStepⅥ.HomeworkReadthepassagemorecarefullyafterclass,andfindsomeusefullanguagepoints.FinishtheexercisesonworkbookP49~50.25LOGO26LOGO1.…killingthehelpfulbacteriaandpestsaswellastheharmfulones.aswellas“(除...之外)也，又”,可连接并列的单词或短语Hegrowsflowersaswellasvegetables.Ateachershouldentertainaswellasteach.Itisunpleasantinsummeraswellasinwinter.Languagepoints27LOGOaswellas=notonly…butalso，但两者在用法上有如下不同notonly…butalso侧重后者，aswellas则着重前者，也就是说AaswellasB=notonlyBbutalsoA。例如：Mr.Brownhasexperienceaswellasknowledge.布朗先生不仅有知识而且有经验。（侧重前者，即experience。）MrBrownhasnotonlyknowledgebutalsoexperience.）（着重后者，即butalso后面的部分。）28LOGO2.Manyofthesechemicalscanleadtocancerorotherillnesses.leadto导致；造成(to是介词，后接名词或动词-ing形式)Toomuchworkandtoolittlerestoftenleadtoillness.Heartfailureledtoherfather’sdeath.leadto(道路)通向；通往Thestreetleadstothesupermarket.29LOGOturnto求助于，转向3.…manycustomersarebeginningtoturntoorganicfarming.Itriedtostandonmyowntwofeetratherthanturnedtomyparents.Wecanturntohimforhelp.turnon打开，开启turnoff关掉turndown调小turnup调大turnagainstsb/sth转而讨厌、反对某人某事turnouttobe最后结果，最终成为turnintosth使......变成turnin交还，交回turnback掉转头turnover翻转30LOGO4.Thisalsokeepstheair,soil,waterandcropsfreefromchemicals.keep…freefrom/of使…免受(影响、伤害等)Weputourbooksinthebookcasetokeepthemfreefromdust.keeponeselffromdoingsth.克制自己不做某事Shecouldhardlykeepherselffromlaugh