Foreword:
InthethirdgradeclassroomofMapleElementarySchool,Mr.Leeisknownforhisinterestingexperimentsthatmakehisstudentsexcitedaboutlearning.Today,thestudentsareeagertoseewhatMr.Leehasinstoreforthemastheygatheraroundthetablefilledwithbeakers,testtubes,andotherscientificequipment.
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Mr.Leebeginsbyintroducingtheconceptofdensity,usingasmallbowlofwaterandafewobjectsthatareeithermoreorlessdensethanwater.Heaskstheclasstopredictwhichobjectswillsinkandwhichwillfloat.
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Next,Mr.Leedemonstrateshowtomixvinegarandbakingsodatocreateachemicalreactionthatproducescarbondioxidegas.Heshowsthestudentshowtocapturethegasinaballoonandexplainshowthisreactionissimilartowhathappensinavolcaniceruption.
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Theclassmovesontoexperimentingwithmagnets,exploringhowtheyattractorrepeleachotherdependingontheirpolarity.Mr.Leechallengesthemtomakeamazeforapaperclipusingmagneticforces.
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Anotherexperimentinvolvesmixingoilandwatertogether,showinghowtheyseparateduetotheirdifferentdensities.Mr.Leeaddsfoodcoloringtothemixturetomakeitmorevisuallyappealingandasksthestudentstoexplainwhattheyobserve.
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Toexplorethepropertiesofair,Mr.Leeusesahairdryertocreatewindandasksthestudentstodesignandbuildawindmillthatcanbepoweredbytheairflow.
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Theclassthenmovesontoexploringthepropertiesoflightandcolor.Mr.Leeusesaprismtoshowhowwhitelightcanbeseparatedintoitscomponentcolors,andthenasksthestudentstocreatetheirownrainbowusingaflashlightandacupofwater.
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Anotherexperimentinvolvesusingapotatotocreateasimplebattery,showinghowchemicalreactionscanproduceelectricalenergy.Mr.Leeexplainsthebasicprinciplesofelectricityandcircuits.
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Mr.Leebringsoutacontainerofdryiceandshowstheclasshowitproducesafog-likeeffectasitsublimatesfromasolidtoagas.Hethenchallengesthemtousethedryicetomakeabubblethatwilltrapthegasinside.
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Theclassthenmovesontoexploringthepropertiesofsound,usingtuningforksandothermusicalinstrumentstodemonstratetheconceptsoffrequencyandvibration.
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Mr.Leeshowstheclasshowtomakeahomemadelavalampusingoil,water,andalka-seltzertablets.Heexplainshowthisexperimentdemonstratestheconceptofbuoyancyandconvectioncurrents.
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Next,theclassexploresthepropertiesofacidsandbases,usinglitmuspapertodeterminewhethervarioussubstancesareacidicoralkaline.Mr.Leealsoshowsthemhowtousecabbagejuiceasanaturalindicator.
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Anotherexperimentinvolvesusingapotatochipbagandacandletodemonstratetheconceptofoxygencombustion.Mr.Leeexplainshowfireneedsoxygentoburnandasksthestudentstohypothesizewhatwillhappenwhentheyremovetheoxygenfromthebag.
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Toexplorethepropertiesoffriction,Mr.Leechallengesthestudentstocreateacarthatcanmovedownarampusingonlytheforceofgravityandfrictiontoslowitdown.
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Next,Mr.Leedemonstrateshowtomakeasimpleelectromagnetusingwire,abattery,andanail.Heshowsthestudentshowchangingthenumberofcoilsofwirecanaffectthestrengthofthemagneticfield.
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Theclassmovesontoexploringthepropertiesofheatandtemperature,usingthermometersandothertoolstomeasureandcomparethetemperatureofvarioussubstances.
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Mr.Leethenshowstheclasshowtomakeasimplepulleysystemusingstringandacoathanger.Heexplainshowpulleyscanbeusedtoliftheavyobjectswithlessforce.
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Anotherexperimentinvolvesusingwaterandfoodcoloringtodemonstratehowdiffusionworks,showinghowmoleculesmovefromareasofhighconcentrationtoareasoflowconcentration.
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Toexplorethepropertiesofpressure,Mr.Leeusesasyringeandaballoontodemonstratehowchangesinvolumecanaffectpressure.HeshowsthemhowtocreateaCartesiandiverusingaplasticbottleandastraw.
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Next,theclassexploresthepropertiesofsolubility,usingsaltandsugartodeterminewhichsubstancesdissolveinwaterandwhichdonot.Mr.Leealsoshowsthemhowtomakeahomemadelavalampusingoil,water,andsalt.
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Mr.Leethenchallengesthestudentstodesignandbuildtheirownexperimentsusingtheprinciplestheyhavelearnedthroughouttheday.Heencouragesthemtobecreativeandthinkoutsidethebox.
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Finally,theclasspresentstheirexperimentstotherestoftheclass,showcasingtheirnewfoundknowledgeandskills.Mr.Leeisimpressedwiththeircreativityandenthusiasmforscience.
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Astheclasscomestoaclose,Mr.Leeremindshisstudentsthatscienceisallaroundusandthattheycancontinuetoexploreanddiscovernewthingsontheirown.Thestudentsleavetheclassroomfeelinginspiredandexcitedabouttheworldofscience.
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