chemical-or-organic-farming優(yōu)質(zhì)課評(píng)比課件

Whatdoyouknowaboutfarming?第一頁(yè)第一頁(yè)，共26頁(yè)。First,buyorselecttheseedsfromthestore.第二頁(yè)第二頁(yè)，共26頁(yè)。Second,weneedtoplow（犁田）orturnoverthesoil.第三頁(yè)第三頁(yè)，共26頁(yè)。Third,wesowtheseedsinthesoil.第四頁(yè)第四頁(yè)，共26頁(yè)。Finally,wecanharvestourgrain.

第五頁(yè)第五頁(yè)，共26頁(yè)。fertilizethesoiltoincreaseproductionofthe

crops

fertilizer第六頁(yè)第六頁(yè)，共26頁(yè)。fertilizerHowmanykindsoffertilizersdoyouknow?

chemicalfertilizers

natural

fertilizers第七頁(yè)第七頁(yè)，共26頁(yè)。chemicalfarmingorganicfarmingchemicalfertilizers

natural

fertilizersBetter？第八頁(yè)第八頁(yè)，共26頁(yè)。ChemicalOrOrganicFarming?第九頁(yè)第九頁(yè)，共26頁(yè)。Task1Skimming（3mins）Findoutthemainideaofthesefourparagraphs.第十頁(yè)第十頁(yè)，共26頁(yè)。EffectofchemicalfertilizerProblemscausedbychemicalfertilizers.P1.P2.Farmersandcustomersturntoorganicfarming.(advantages)Othermethodstokeepthesoilfertile.

P3.P4.第十一頁(yè)第十一頁(yè)，共26頁(yè)。Whyarechemicalfertilizerssopopularinfarmingtoday?Becausetheyarecheap.Theyareagreatwaytostopcropdiseaseandincreaseproduction.Theycancausedamagetotheland.Theyarebenefitforpeople’shealth.Task2ScanningParagraph1第十二頁(yè)第十二頁(yè)，共26頁(yè)。Theyareagreatwaytostopcropdiseaseandincreaseproduction.2.Whyarechemicalfertilizerssopopularinfarmingtoday?第十三頁(yè)第十三頁(yè)，共26頁(yè)。2.Whatproblemscanbecausedbyusingchemicalfertilizers?

First,theycan_________thelandby

_________thehelpfulbacteriaandpests.Theyalso________intheground,__________inpeople’sbodiesand________cancerorotherillnesses.Inaddition,itusuallygrowstoofasttobefullof____________.Paragraph2damagekillingstaybuildupleadtonutrition第十四頁(yè)第十四頁(yè)，共26頁(yè)。1.Whatisorganicfarming?2.Whataretheadvantagesoforganicfarming?3.Whatarethemethodstokeepthesoilfertile?1.Organicfarmingisfarmingwithoutusinganychemicals.Haha,we'veturnedtoorganicfarming.Paragraph3&4第十五頁(yè)第十五頁(yè)，共26頁(yè)。2.

Whataretheadvantagesoforganicfarming?

Thefarmers________keepingtheirsoilrich,________diseaseand_______theair,soil,waterandcrops_________chemicals.Paragraph3focusonreducingkeepingfreefrom第十六頁(yè)第十六頁(yè)，共26頁(yè)。Themethodstokeepthesoilfertile

usingnaturalwastefromanimalsasfertilizer.changingthekindofcropineachfield.plantingcropstousedifferentlevelsofsoil.plantinggrassbetweencropstoprevent…

Thesamegoal:____________________________________________________________________________________________togrowgoodfoodandavoiddamagingtheenvironmentorpeople’shealth.Paragraph3&41234第十七頁(yè)第十七頁(yè)，共26頁(yè)。4.Whatisthemainreasonforusingorganicfarmingmethods?Themainreasonforusingorganicfarmingmethodsistogrowgoodfoodandtoavoiddamagingtheenvironmentorpeople’shealth.第十八頁(yè)第十八頁(yè)，共26頁(yè)。

Inrecentdays,scientistshavediscoveredthatusing________fertilizersforalongtimecan_________________thelandandalsopeople'shealth.Thereareseveral__________causedbychemicalfertilizers.Theydamagetheland,stayinthewaterforalongtimewhichcan___________inpeople’sbodiesand____________manyillnesses.chemicalproblemscausedamagetobuildupFillintheblanksaccordingtothepassage.leadto第十九頁(yè)第十九頁(yè)，共26頁(yè)。________farmingisbecomingmorepopularwithsomefarmers.Organicfarmingdoesnotuseanychemicalsand_________keepingthesoilrich.Thisalso______theairandcrops___________chemicals.Therearemanyorganicfarming_________formakingthelandhealthyandproductive.Allofthesemethodstrytoproducegoodfoodandtokeeptheenvironmentandpeople’shealth.keepmethodsfocusonOrganicfreefrom第二十頁(yè)第二十頁(yè)，共26頁(yè)。請(qǐng)以“PlasticorClothbags?”為題模仿這篇文章的篇章結(jié)構(gòu)和句子結(jié)構(gòu)去寫(xiě)一篇說(shuō)明文。第二十一頁(yè)第二十一頁(yè)，共26頁(yè)。DiscussionandpracticePlasticOrClothBags?Para1:Para2:Para3:Para4:Haveabriefintroductionofthepresentsituation.(Effects)Theproblemscausedbyusingplasticbags.Theadvantagesofusingclothbags.Conclusion.第二十二頁(yè)第二十二頁(yè)，共26頁(yè)。PlasticorClothBagsOverthepasthalfcentury,___________havebecomeverycommonin___________.______welcomedthemasa_________wayto____________.Recently,however,wehavebeenfindingthattheycancausedamageto___________,even_________,topeople’shealth.PlasticbagsourdailylifeWeconvenientcarrygoodsenvironmentworse第二十三頁(yè)第二十三頁(yè)，共26頁(yè)。HomeworkReadthetextmorecarefullyafterclass,andunderlinesomeusefullanguagepoints.Finishthewriting.第二十四頁(yè)第二十四頁(yè)，共26頁(yè)。Overthepasthalfcentury,…h(huán)avebecomeverycommon….…welcomedthemasa…wayto….Recently,however,wehavebeenfindingthattheycan