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高中英語(yǔ)M4ChemicalorOrganicFarming讀寫教學(xué)概要寫作公開課課件OrganicfoodsNon-organicfoodsnaturalchemicalfreeartificialusingchemicals(fertilizers/pesticides)traditionalconventionalOrganicfoodsNon-organicfoodsChemicalorOrganicFarming?ChemicalorOrganicFarming?Read&ShareWhatcanwegetfromthepassage?Whichonedoestheauthorprefer?Read&ShareWhatcanwegetfrOverthepasthalfcentury,usingchemicalfertilizershasbecomeverycommoninfarming.Manyfarmerswelcomethemasagreatwaytostopcropdiseaseandincreaseproduction.Recently,however,scientistshavebeenfindingthatlong-termuseofthesefertilizerscancausedamagetothelandand,evenmoredangerous,topeople’shealth.Para.1Overthepasthalfcentury,usOverthepasthalfcentury,usingchemicalfertilizershasbecomeverycommoninfarming.Manyfarmerswelcomethemasagreatwaytostopcropdiseaseandincreaseproduction.Recently,however,scientistshavebeenfindingthatlong-termuseofthesefertilizerscancausedamagetothelandand,evenmoredangerous,topeople’shealth.beneficialpositiveeffectsharmfulnegativeeffectshoweverPara.1
effects
of
chemical
fertilizerspositive&negativeTip1:Signalwords(likehowever,but,nevertheless)helpgetthekeyinformationquickly.stopcropdiseaseincreaseproductiondamagethelandandpeople’shealthOverthepasthalfcentury,usWhataresomeoftheproblemscausedbychemicalfertilizers?First,theydamagethelandbykillingthehelpfulbacteriaandpestsaswellastheharmfulones.Chemicalsalsostayinthegroundandundergroundwaterforalongtime.Thisaffectscropsand,therefore,animalsandhumans,sincechemicalsgetinsidethecropsandcannotjustbewashedoff.Thesechemicalsinthefoodsupplybuildupinpeople’sbodiesovertime.Manyofthesechemicalscanleadtocancerorotherillnesses.Inaddition,fruit,vegetablesandotherfoodgrownwithchemicalfertilizersusuallygrowtoofasttobefullofmuchnutrition.Theymaylookbeautiful,butinsidethereisusuallymorewaterthanvitaminsandminerals.Para.2WhataresomeoftheproblemsWhataresomeoftheproblemscausedbychemicalfertilizers?First,theydamage
thelandbykillingthehelpfulbacteriaandpestsaswellastheharmfulones.Chemicalsalsostayinthegroundandundergroundwaterforalongtime.Thisaffects
cropsand,therefore,animalsandhumans,sincechemicalsgetinsidethecropsandcannotjustbewashedoff.Thesechemicalsinthefoodsupplybuildupinpeople’sbodiesovertime.Manyofthesechemicalscanleadtocancerorotherillnesses.Inaddition,fruit,vegetablesandotherfoodgrownwithchemicalfertilizersusuallygrowtoo
fasttobefullofmuchnutrition.
Theymaylookbeautiful,blemsFirst,alsoInaddition,Para.2
problemscausedbychemical
fertilizers---damagingtheland,crops,andhumansdamage
thelandaffectscrops,animalsandhumans,toofasttobefullofmuchnutrition.Tip2:Signalwords(likefirst,also,besides,inaddition)helplistmainpointsclearly.WhataresomeoftheproblemsWiththesediscoveries,somefarmersandmanycustomersarebeginningtoturntoorganicfarming.Organicfarmingissimplyfarmingwithoutusinganychemicals.Theyfocusonkeepingtheirsoilrichandfreeofdisease.Ahealthysoilreducesdiseaseandhelpscropsgrowstrongandhealthy.Organicfarmers,therefore,oftenpreferusingnaturalwastefromanimalsasfertilizer.Theyfeelthatthismakesthesoilintheirfieldsricherinmineralsandsomorefertile.Thisalsokeepstheair,soil,waterandcropsfreefromchemicals.Para.3Withthesediscoveries,somefWiththesediscoveries,somefarmersandmanycustomersarebeginningtoturntoorganicfarming.Organicfarmingissimplyfarmingwithoutusinganychemicals.Theyfocusonkeeping
their
soil
richandfree
ofdisease.Ahealthysoilreducesdiseaseandhelpscropsgrowstrongandhealthy.Organicfarmers,therefore,oftenpreferusingnaturalwastefromanimalsasfertilizer.Theyfeelthatthismakesthesoilintheirfieldsricherinmineralsandsomorefertile.Thisalsokeepstheair,soil,waterandcropsfree
from
chemicals.Para.3advantagesoforganicfarmingkeepingthesoilrichandfreeofdiseasereducediseaseandhelpcropsgrowbettermakethesoilricherandmorefertilekeeptheair,soil,water,andcropsfreefromchemicalsWiththesediscoveries,somefWiththesediscoveries,somefarmersandmanycustomersarebeginningtoturntoorganicfarming.Organicfarmingissimplyfarmingwithoutusinganychemicals.Theyfocusonkeeping
their
soil
richandfree
ofdisease.Ahealthysoilreducesdiseaseandhelpscropsgrowstrongandhealthy.Organicfarmers,therefore,oftenpreferusingnaturalwastefromanimalsasfertilizer.Theyfeelthatthismakesthesoilintheirfieldsricherinmineralsandsomorefertile.Thisalsokeepstheair,soil,waterandcropsfree
from
chemicals.Para.3advantagesoforganicfarming---keepingthesoilfertileandhealthykeepthesoilrichandfreeofdiseasereducediseaseandhelpcropsgrowbettermakethesoilricherandmorefertilekeeptheair,soil,water,andcropsfreefromchemicalsTip3:Sometimes,generalizingtherepeatedwordscanhelpsimplifythesummary.Withthesediscoveries,somefOrganicfarmersalsousemanyothermethodstokeepthesoilfertile.Theyoftenchangethekindofcropineachfieldeveryfewyears,forexample,growingcornorwheatandthenthenextyearperpeasorsoybeans.Cropssuchaspeasorsoybeansputimportantmineralsbackintothesoil,makingitreadyforcropssuchaswheatorcornthatneedrichandfertilesoil.Organicfarmersalsoplantcropstousedifferentlevelsofsoil,forexample,plantingpeanutsthatusetheground’ssurfacefollowedbyvegetablesthatputdowndeeproots.Someorganicfarmerspreferplantinggrassbetweencropstopreventwindorwaterfromcarryingawaythesoil,andthenleavingitinthegroundtobecomeanaturalfertilizerforthenextyear’scrop.Thesemanydifferentorganicfarmingmethodshavethesamegoal:togrowfoodandavoiddamagingtheenvironmentorpeople’shealth.Para.4OrganicfarmersalsousemanyOrganicfarmersalsousemanyothermethodstokeepthesoilfertile.Theyoftenchangethekindofcropineachfieldeveryfewyears,forexample,growingcornorwheatandthenthenextyearperpeasorsoybeans.Cropssuchaspeasorsoybeansputimportantmineralsbackintothesoil,makingitreadyforcropssuchaswheatorcornthatneedrichandfertilesoil.Organicfarmersalso
plantcropstousedifferentlevelsofsoil,forexample,
plantingpeanutsthatusetheground’ssurfacefollowedbyvegetablesthatputdowndeeproots.Someorganicfarmerspreferplantinggrassbetweencropstopreventwindorwaterfromcarryingawaythesoil,andthenleavingitinthegroundtobecomeanaturalfertilizerforthenextyear’scrop.Thesemanydifferentorganicfarmingmethodshavethesamegoal:togrowfoodandavoiddamagingtheenvironmentorpeople’shealth.differentmethodsPara.4othermethodstokeepthesoilfertilechangethekindofcropeveryfewyearsplantcropstousedifferentlevelsofsoilplantgrassbetweencropsforexample,forexample,samegoalTip4:Whensummarizing,extrainformation(examples,details)canusuallybeignored.OrganicfarmersalsousemanyPara.1effectsofchemicalfertilizers(positivevsnegative)Para.4othermethodstokeepthesoilfertilePara.3advantagesoforganicfarmingPara.2problemscausedbychemicalfertilizersWhatWhyHowWiththesediscoveries,....Tosolvetheseproblems,farmersturnto…,because……alsousemanyothermethods...Apartfrom…therealsosomeothermethodslike...Tip4:Transitionalsentenceshelplinksentencesandparagraphstogethersmoothly.Para.1effectsofchemicalferSummarytime!Writeasummaryofthispassagebasedonouranalysis.Trytoincludeallthepointsclearlyandconcisely.Attention!Whenwritingasummary,donotcopyfromthepassage!Instead,useyourownwords!Summarytime!WriteasummaryoHomeworkFinishyoursummaries.Sharewithyourpartnerandgiveeachothercomments.HomeworkFinishyoursummaries.Thankyou!Thankyou!Tip1:Usedifferentsubjectstorestatethesentence.Tip2:Usedifferentsentencepatternstorestatethesentence.Tip3:Usedifferentverbformstorestatethesentence.Attention!Whenwritingasummary,donotcopyfromthepassage!Instead,useyourownwordstorestateit!Tip4:Usegeneralwordstosummarizethedetails.Tip1:UsedifferentsubjectsSummarywriting:
ChemicalorOrganicFarming?Althoughchemicalfarminghasitspositiveeffects,italsohasnegativeeffects.Despite
itspositiveadvantages,chemicalfarmingalsohasnegativeeffects.Scientistshavediscoveredthenegativeeffectsofchemicaleffectsdespiteitspositiveadvantages.Thenegativeeffectsofchemicaleffectscannotbeignoreddespiteitspositiveadvantages.Tip1:Usedifferentsubjectstorestatethesentence.Summarywriting:ChemicalorOLong-termuseofthesechemicalfertilizerscandamagetheland,affectcrops,animals,andhumans.Productsgrownwithchemicalfertilizersusuallygrowtoofasttobefullofmuchnutrition.Long-termuseofchemicalfertilizerscannotonlydamage
thelandbutalsoaffectcrops,animals,andhumans.Itisthelong-termuseofchemicalfertilizersthatleadsto
thelessfertileland,lessnutritiousproducts,aswellassickanimalsandhumans.Asaresultoflong-termuseofchemicalfertilizers,thelandgetslessfertile,productsarelessnutritious.Besides,animalsandhumansarelikelytogetsick.Tip1:Usedifferentsentencepatternstorestatethesentence.Long-termuseofthesechemicaTosolvetheseproblems,peopleareturningtoorganicfarming.Totackletheseproblems,organicfarmingcomesintobeing.Therefore,peopledecidetoadoptorganicfarmingasanewwaytosolvetheseproblems.Tip3:Usedifferentverbstorestatethesentence.Tosolvetheseproblems,peoplApartfromusingnaturalwasteasfertilizers,therearealsoothermethodsoforganicfarming.Apartfromusingnaturalwaste高中英語(yǔ)M4ChemicalorOrganicFarming讀寫教學(xué)概要寫作公開課課件OrganicfoodsNon-organicfoodsnaturalchemicalfreeartificialusingchemicals(fertilizers/pesticides)traditionalconventionalOrganicfoodsNon-organicfoodsChemicalorOrganicFarming?ChemicalorOrganicFarming?Read&ShareWhatcanwegetfromthepassage?Whichonedoestheauthorprefer?Read&ShareWhatcanwegetfrOverthepasthalfcentury,usingchemicalfertilizershasbecomeverycommoninfarming.Manyfarmerswelcomethemasagreatwaytostopcropdiseaseandincreaseproduction.Recently,however,scientistshavebeenfindingthatlong-termuseofthesefertilizerscancausedamagetothelandand,evenmoredangerous,topeople’shealth.Para.1Overthepasthalfcentury,usOverthepasthalfcentury,usingchemicalfertilizershasbecomeverycommoninfarming.Manyfarmerswelcomethemasagreatwaytostopcropdiseaseandincreaseproduction.Recently,however,scientistshavebeenfindingthatlong-termuseofthesefertilizerscancausedamagetothelandand,evenmoredangerous,topeople’shealth.beneficialpositiveeffectsharmfulnegativeeffectshoweverPara.1
effects
of
chemical
fertilizerspositive&negativeTip1:Signalwords(likehowever,but,nevertheless)helpgetthekeyinformationquickly.stopcropdiseaseincreaseproductiondamagethelandandpeople’shealthOverthepasthalfcentury,usWhataresomeoftheproblemscausedbychemicalfertilizers?First,theydamagethelandbykillingthehelpfulbacteriaandpestsaswellastheharmfulones.Chemicalsalsostayinthegroundandundergroundwaterforalongtime.Thisaffectscropsand,therefore,animalsandhumans,sincechemicalsgetinsidethecropsandcannotjustbewashedoff.Thesechemicalsinthefoodsupplybuildupinpeople’sbodiesovertime.Manyofthesechemicalscanleadtocancerorotherillnesses.Inaddition,fruit,vegetablesandotherfoodgrownwithchemicalfertilizersusuallygrowtoofasttobefullofmuchnutrition.Theymaylookbeautiful,butinsidethereisusuallymorewaterthanvitaminsandminerals.Para.2WhataresomeoftheproblemsWhataresomeoftheproblemscausedbychemicalfertilizers?First,theydamage
thelandbykillingthehelpfulbacteriaandpestsaswellastheharmfulones.Chemicalsalsostayinthegroundandundergroundwaterforalongtime.Thisaffects
cropsand,therefore,animalsandhumans,sincechemicalsgetinsidethecropsandcannotjustbewashedoff.Thesechemicalsinthefoodsupplybuildupinpeople’sbodiesovertime.Manyofthesechemicalscanleadtocancerorotherillnesses.Inaddition,fruit,vegetablesandotherfoodgrownwithchemicalfertilizersusuallygrowtoo
fasttobefullofmuchnutrition.
Theymaylookbeautiful,blemsFirst,alsoInaddition,Para.2
problemscausedbychemical
fertilizers---damagingtheland,crops,andhumansdamage
thelandaffectscrops,animalsandhumans,toofasttobefullofmuchnutrition.Tip2:Signalwords(likefirst,also,besides,inaddition)helplistmainpointsclearly.WhataresomeoftheproblemsWiththesediscoveries,somefarmersandmanycustomersarebeginningtoturntoorganicfarming.Organicfarmingissimplyfarmingwithoutusinganychemicals.Theyfocusonkeepingtheirsoilrichandfreeofdisease.Ahealthysoilreducesdiseaseandhelpscropsgrowstrongandhealthy.Organicfarmers,therefore,oftenpreferusingnaturalwastefromanimalsasfertilizer.Theyfeelthatthismakesthesoilintheirfieldsricherinmineralsandsomorefertile.Thisalsokeepstheair,soil,waterandcropsfreefromchemicals.Para.3Withthesediscoveries,somefWiththesediscoveries,somefarmersandmanycustomersarebeginningtoturntoorganicfarming.Organicfarmingissimplyfarmingwithoutusinganychemicals.Theyfocusonkeeping
their
soil
richandfree
ofdisease.Ahealthysoilreducesdiseaseandhelpscropsgrowstrongandhealthy.Organicfarmers,therefore,oftenpreferusingnaturalwastefromanimalsasfertilizer.Theyfeelthatthismakesthesoilintheirfieldsricherinmineralsandsomorefertile.Thisalsokeepstheair,soil,waterandcropsfree
from
chemicals.Para.3advantagesoforganicfarmingkeepingthesoilrichandfreeofdiseasereducediseaseandhelpcropsgrowbettermakethesoilricherandmorefertilekeeptheair,soil,water,andcropsfreefromchemicalsWiththesediscoveries,somefWiththesediscoveries,somefarmersandmanycustomersarebeginningtoturntoorganicfarming.Organicfarmingissimplyfarmingwithoutusinganychemicals.Theyfocusonkeeping
their
soil
richandfree
ofdisease.Ahealthysoilreducesdiseaseandhelpscropsgrowstrongandhealthy.Organicfarmers,therefore,oftenpreferusingnaturalwastefromanimalsasfertilizer.Theyfeelthatthismakesthesoilintheirfieldsricherinmineralsandsomorefertile.Thisalsokeepstheair,soil,waterandcropsfree
from
chemicals.Para.3advantagesoforganicfarming---keepingthesoilfertileandhealthykeepthesoilrichandfreeofdiseasereducediseaseandhelpcropsgrowbettermakethesoilricherandmorefertilekeeptheair,soil,water,andcropsfreefromchemicalsTip3:Sometimes,generalizingtherepeatedwordscanhelpsimplifythesummary.Withthesediscoveries,somefOrganicfarmersalsousemanyothermethodstokeepthesoilfertile.Theyoftenchangethekindofcropineachfieldeveryfewyears,forexample,growingcornorwheatandthenthenextyearperpeasorsoybeans.Cropssuchaspeasorsoybeansputimportantmineralsbackintothesoil,makingitreadyforcropssuchaswheatorcornthatneedrichandfertilesoil.Organicfarmersalsoplantcropstousedifferentlevelsofsoil,forexample,plantingpeanutsthatusetheground’ssurfacefollowedbyvegetablesthatputdowndeeproots.Someorganicfarmerspreferplantinggrassbetweencropstopreventwindorwaterfromcarryingawaythesoil,andthenleavingitinthegroundtobecomeanaturalfertilizerforthenextyear’scrop.Thesemanydifferentorganicfarmingmethodshavethesamegoal:togrowfoodandavoiddamagingtheenvironmentorpeople’shealth.Para.4OrganicfarmersalsousemanyOrganicfarmersalsousemanyothermethodstokeepthesoilfertile.Theyoftenchangethekindofcropineachfieldeveryfewyears,forexample,growingcornorwheatandthenthenextyearperpeasorsoybeans.Cropssuchaspeasorsoybeansputimportantmineralsbackintothesoil,makingitreadyforcropssuchaswheatorcornthatneedrichandfertilesoil.Organicfarmersalso
plantcropstousedifferentlevelsofsoil,forexample,
plantingpeanutsthatusetheground’ssurfacefollowedbyvegetablesthatputdowndeeproots.Someorganicfarmerspreferplantinggrassbetweencropstopreventwindorwaterfromcarryingawaythesoil,andthenleavingitinthegroundtobecomeanaturalfertilizerforthenextyear’scrop.Thesemanydifferentorganicfarmingmethodshavethesamegoal:togrowfoodandavoiddamagingtheenvironmentorpeople’shealth.differentmethodsPara.4othermethodstokeepthesoilfertilechangethekindofcropeveryfewyearsplantcropstousedifferentlevelsofsoilplantgrassbetweencropsforexample,forexample,samegoalTip4:Whensummarizing,extrainformation(examples,details)canusuallybeignored.OrganicfarmersalsousemanyPara.1effectsofchemicalfertilizers(positivevsnegative)Para.4othermethodstokeepthesoilfertilePara.3advantagesoforganicfarmingPara.2problemscausedbychemicalfertilizersWhatWhyHowWiththesediscoveries,....Tosolvetheseproblems,farmersturnto…,because……alsousemanyothermethods...Apartfrom…therealsosomeothermethodslike...Tip4:Transitionalsentenceshelplinksentencesandparagraphstogethersmoothly.Para.1effectsofchemicalferSummarytime!Writeasummaryofthispassagebasedonouranalysis.Trytoincludeallthepointsclearlyandconcisely.Attention!Whenwritingasummary,donotcopyfromthepassage!Instead,useyourownwords!Summarytime!WriteasummaryoHomeworkFin
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