Customizable Design of Experiments Project Ideas for High School: Moldy Bread
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Explorarea Artei Designului Experimental: un Ghid pas cu pas Pentru Studenți și Educatori
De Oliver Smith
Predarea designului experimental și lăsarea elevilor să își dezvolte propriile întrebări și ipoteze necesită timp. Aceste materiale au fost create pentru a structura și structura procesul pentru a permite profesorilor să se concentreze pe îmbunătățirea ideilor cheie în designul experimental.
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Storyboard Descriere
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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