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Moldy Bread Higher Example

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Experimental Design - completed planning worksheet

Storyboard Text

  • Question-Whatdoyouwanttofindout?
  • ExplanationofHypothesis
  • Howdoestemperatureaffectmoldgrowthonbread?
  • Moldisalivingorganism.Thechemicalreactionsthatkeepthemold aliveareaffectedbytemperature.Whenweincreasethetemperature, thespeedofthesechemicalreactionsincreases.Therefore,ifwe increasethetemperature,moremoldshouldgrowonthebread.
  • Hypothesis
  • Prediction
  • IfIincreasethetemperature,thenmoldwillgrowmore quicklyonthebread.
  • Thepieceofbreadkeptinthewarmestlocationwill havethemostmoldgrowth.
  • IndependentVariable
  • Whatisyourrange?Howmanytimeswillyourepeatthetest?
  • Thetemperatureofstoragespace
  • Therewillbe2differenttemperatures: Refrigeratortemperature40°F(4°C) Roomtemperature73°F(23°C). Iwillrepeattheexperiment3timesateach temperature.
  • Howwillyoumeasureyourdependentvariable?
  • DependentVariable
  • Theamountofmoldonthebread
  • UsingatransparentgridIwillcalculatethe areaofthebreadwhichiscoveredinmold.
  • ControlledVariables
  • Howwillyoukeepthemconstant?
  • 1.Amountoflight 2.Exposuretoair 3.Typeofbread 4.Sizeofbreadslice
  • 1.Allthebreadsliceswillbeputinpaperbagsso theyareallinthedark. 2.Allthebreadsliceswillbeputinplasticbags. 3.Allthebreadsliceswillbetakenfromthesame loaf. 4.Breadsliceswillbechosenthatarethesamesize.
  • Riskasssessment
  • Howcantheserisksbemanaged?
  • Youcouldhaveanallergicreactiontomold. Youcouldinhalethemold.
  • Ifyouareallergictomolddon'ttakepartin theexperiment. Donotopenthebagsattheendofthe experimentanddisposeofthemcarefully.
  • Diagram
  • Materials-Whatdoyouneedto completethisexperiment?Why?
  • •6slicesofbreadthatarethesamesize •Arefrigerator-keptataconstanttemperature •Awarmplace-keptataconstanttemperature •6plasticbags-tokeepthebreadinandstopthe moldgettingout •6paperbags-tokeepthesunlightout •Aruler-tomeasurethemoldspots •Atransparentgrid-tohelpworkouttheareaof breadthatiscoveredinmold •Amarker-tolabelthebags
  • Plan-Howareyougoingtocarryitoutsafely?
  • 1.Usethemarkerpentolabelthe6bagssotheycanbeidentifiedeasilylater.Placeasliceof breadineachbag. 2.Putthebagsinsidepaperbagsandput3intothefridgeand3inacloset. 3.Leavethebagsfor2days. 4.Checkthebagseverydayandrecordhowmuchofthesurfaceareaiscoveredinmold.This canbedoneusingatransparentgrid. 5.Recordyourresultsinatable. 6.Donotopenthebagsanddisposeofthemcarefullyintothetrash.
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