I. QUESTION: II. VARIABLES III: HYPOTHESIS IV. MATERIALS ...

[Pages:1]SAMPLELABREPORT Youwatchyourmotherorfathercookingspaghettibyboilingpastainwater.Younoticethatsaltwasaddedtothe waterbeforeboilingandyouwonderwhytheydidthis.Yourparentstellyouthataddingsalttothewateraddsflavorto thespaghettipasta.Youwonderifaddingsalthasanyaffectontheboilingtemperatureofwater. I.QUESTION:Howdoessaltaffecttheboilingtemperatureofwater? II.VARIABLES:Theindependentvariableisthedifferentamountssaltthatwillbeaddedtothewater(whatisdoneby thescientist).Thedependentvariableistheboilingtemperatureofthewater(whatisbeingmeasured). III:HYPOTHESIS:Ifsaltisaddedtowaterthen,theboilingtemperatureislowered. IV.MATERIALS&PROCEDURES: TablesaltDistilledWater2QtCookingPot MeasuringcupMeasuringspoonsThermometerStirringspoon 1)Add1quartofdistilledwatertocookingpotandplaceonstove. 2)Usethethermometertorecordthehighesttemperatureoftheboilingwater. 3)Repeatsteponeaboveexceptaddonetablespoonofsalttothewaterandstirtodissolve. 4)Usethermometertorecordthehighesttemperatureoftheboilingsaltwater. 5)Repeatsteponeaboveexceptaddtwotablespoonsofsalttothewaterandstirtodissolve. 6)Usethermometertorecordthehighesttemperatureoftheboilingsaltwater. V.DATATABLE/GRAPH

AmountofSaltaddedtowater

BoilingTemperatureinoF

Nosaltadded

212.9oF

1TablespoonSalt

215.6oF

2TablespoonSalt

218.3oF

VI:ANALYSIS:Mydatatableandgraphclearlyshowsthataddingsaltraisestheboilingtemperatureofwater.Forevery tablespoon of salt added, the boiling temperature increased by almost 3 degrees. Therefore, my hypothesis was not supported-themoresaltthatisaddedtowater,thehighertheboilingtemperature.Thisexperimentusedregulartable saltanditwouldbeinterestingtorepeatthisexperimentwithseasalttoseeifthetypeofsaltmakesadifference. VII.CONCLUSION:InthisexperimentIlearnedthatifyouaddsalttowaterthenthetemperaturewillgethigherbecause salthelpsitgethotter.Ithelpsitgethotterbytheingredientsinthesaltthatcausethewatertoneedmoreheattoboil. Themoreheatthereisthemoreitboils,andthemoreitboilsthehotterthetemperature.Thisexperimentwasdoneona day when it was below freezing outside. This may have increased the time it took for the water to boil rather than the salt.Repeatingthisexperimentinthesummerwouldshowifthatistrueornot.

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