Customizable Design of Experiments Project Ideas for High School: Moldy Bread
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Raziskovanje Umetnosti Eksperimentalnega Oblikovanja: Vodnik po Korakih za Študente in Učitelje
Avtor: Oliver Smith
Poučevanje eksperimentalnega načrtovanja in omogočanje učencem, da razvijejo lastna vprašanja in hipoteze, zahteva čas. Ti materiali so bili ustvarjeni za oder in strukturo procesa, ki učiteljem omogoča, da se osredotočijo na izboljšanje ključnih zamisli v eksperimentalnem načrtovanju.
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Snemalna Knjiga Opis
Experimental Design - completed planning worksheet
Snemalna Knjiga Besedilo
- 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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