設(shè)計(jì)者：Melodie序言教學(xué)目標(biāo)教學(xué)過程versionChartingMoldAnAskERICLessonAuthor:MelodieHill,editedbySchoolorAffiliation:LewisArriolaElementary.,Cortez,Date:GradeLevel(s):2,3,4,5,Oversize:Micro-organismslive,growandreproduceallaroundus.Theyarebothdetrimentalandhelpful.Thisactivityisdesignedtoshowstudentsthattheyareallaround,andthattheirpopulationgrowthcanbechartedbasedonfoodsupply.Objectives(s):StudentswillbeableIdentifysourcesofmicro-organisms.(air,water,Showmicro-organismgrowthonanavailablefoodChartmicro-organismgrowthanddeclineasthefoodsupplyrunsDescribefactorsthatinhibitmicro-organismgrowth.(cold,sunshine,sterilization,Describewaysthatmicro-organismsareusedResources:Smallcontainerorjar,tape,bread,boilingwatertosterilize,accesstorefrigerator,graphpaper,yogurt,cheese,yeastbreadslices,handlenses.Studentresources:pencilorwritingUsingtape,labelacontainer(jar,smallpetridish,etc.),withthestudentsSelectsometosterilizewithboilingwater.Selectsometoleaveascehalfapieceofbreadineachjar.Sealwithtape.Labelwithvariablebeingtested.cesomeoutsideinthesunshine,cesomeintherefrigerator,leavesomeasis.Cutgraphpapercirclesandtapeonbottomofpetridish.Countnumberofsquaresvisibleeachday.Numbersshoulddecrease.Observeoverseveraldayswithhandlens.Asfoodsupplyrunsout,moldwillbegintodieoffitself.Numberofvisiblesquareswillremainthesame,orincrease.Havestudentskeepagraphofseveraldaysgrowth.Markpointsofincrease,stabilizationanddecrease.Compareclassresults.Culturesgrowninrefrigerationandundersunlightwillhavelittlegrowth.Culturesgrownundersterilizationwillhavelittleornogrowth.Thoseleftasiswillhaveabundantgrowth.Bringbreaddough,yeast,yogurt,etc.Exinthatmicro-organismgrowthhasproductivesideeffects.Parentvolunteers