chemical-or-organic-farming优质课评比课件.ppt

Unit2Workingtheland,李鸥丽水黎明中学,First,buyorselecttheseedsfromthestore.,Second,weneedtoplow（犁田）orturnoverthesoil.,Third,wesowtheseedsinthesoil.,Finally,wecanharvestourgrain.,fertilizethesoil,toincreaseproductionofthecrops,fertilizer,fertilizer,Howmanykindsoffertilizersdoyouknow?,chemicalfertilizersnaturalfertilizers,chemicalfarmingorganicfarming,chemicalfertilizersnaturalfertilizers,Better？,ChemicalOrOrganicFarming?,Task1Skimming（3mins）,Findoutthemainideaofthesefourparagraphs.,Effectofchemicalfertilizer,Problemscausedbychemicalfertilizers.,P1.,P2.,Farmersandcustomersturntoorganicfarming.(advantages),Othermethodstokeepthesoilfertile.,P3.,P4.,Whyarechemicalfertilizerssopopularinfarmingtoday?Becausetheyarecheap.Theyareagreatwaytostopcropdiseaseandincreaseproduction.Theycancausedamagetotheland.Theyarebenefitforpeopleshealth.,Task2Scanning,Paragraph1,2.Whatproblemscanbecausedbyusingchemicalfertilizers?,First,theycan_thelandby_thehelpfulbacteriaandpests.Theyalso_intheground,_inpeoplesbodiesand_cancerorotherillnesses.Inaddition,itusuallygrowstoofasttobefullof_.,Paragraph2,damage,killing,stay,buildup,leadto,nutrition,1.Whatisorganicfarming?2.Whataretheadvantagesoforganicfarming?3.Whatarethemethodstokeepthesoilfertile?,1.Organicfarmingisfarmingwithoutusinganychemicals.,Haha,weveturnedtoorganicfarming.,Paragraph3&4,2.Whataretheadvantagesoforganicfarming?Thefarmers_keepingtheirsoilrich,_diseaseand_theair,soil,waterandcrops_chemicals.,Paragraph3,focuson,reducing,keeping,freefrom,Themethodstokeepthesoilfertileusingnaturalwastefromanimalsasfertilizer.changingthekindofcropineachfield.plantingcropstousedifferentlevelsofsoil.plantinggrassbetweencropstoprevent,Thesamegoal:_,togrowgoodfoodandavoiddamagingtheenvironmentorpeopleshealth.,Paragraph3&4,1,2,3,4,Inrecentdays,scientistshavediscoveredthatusing_fertilizersforalongtimecan_thelandandalsopeopleshealth.Thereareseveral_causedbychemicalfertilizers.Theydamagetheland,stayinthewaterforalongtimewhichcan_inpeoplesbodiesand_manyillnesses.,chemical,problems,causedamageto,buildup,Fillintheblanksaccordingtothepassage.,leadto,_farmingisbecomingmorepopularwithsomefarmers.Organicfarmingdoesnotuseanychemicalsand_keepingthesoilrich.Thisalso_theairandcrops_chemicals.Therearemanyorganicfarming_formakingthelandhealthyandproductive.Allofthesemethodstrytoproducegoodfoodandtokeeptheenvironmentandpeopleshealth.,keep,methods,focuson,Organic,freefrom,请以“PlasticorClothbags?”为题模仿这篇文章的篇章结构和句子结构去写一篇说明文。,Discussionandpractice,PlasticOrClothBags?,Para1:Para2:Para3:Para4:,Haveabriefintroductionofthepresentsituation.(Effects)Theproblemscausedbyusingplasticbags.Theadvantagesofusingclothbags.Conclusion.,PlasticorClothBags,Overthepasthalfcentury,_havebecomeverycommonin_._welcomedthemasa_wayto_.Recently,however,wehavebeenfindingthattheycancausedamageto_,even_,topeopleshealth.,Plasticbags,ourdailylife,We,convenient,carrygoods,environment,worse,Homework,Readthetextmorecarefullyafterclass,andunderlinesomeusefullanguagepoints.Finishthewriting.,Overthepasthalfcentury,havebecomeverycommon.welcomedthemasawayto.Recently,however,wehavebeenfindingthatthey