the science of water：水科学

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1、TheScienceofWaterIntroductionMyinvestigativequestionwas:Doesthetemperatureofwateraffectthetimeittakesforthewatertofreeze?HypothesisMaterials1.Water2.3containers(similar)3.CandyThermometer(tomeasuretemperatureofwater)4.Watch(tomeasuretimeittakesforwatertofreeze)5.Tablespoon(tomeasuret

2、heamountofwatertoputinthecontainer)6.Microwave(toheatwater)7.Freezer(tofreezewater)Research/SourcesofInformationBeforeIstarttheexperimentIneedtofindout:·thetemperatureatwhichwaterfreezesandboils·thetemperatureofthefreezer·theroomtemperature·theproceduresandmaterials.Ialsodidthefollow

3、ingexperimentasbackgroundresearch.1.Idecidedtouseaclocktimertomeasurethetimeittakesforthewatertofreezeandapaperknifetofeelifthewaterinthebottleshasfrozenandbecomesolidice.2.Itookfourwhiteglassesthatwereallthesamekind.3.Ipouredonecupoftapwaterintooneglassandletitsittheresoitcouldbecom

4、eroomtemperaturewater.4.Iusedadifferentglasstomakeboilingwater.IusedonecupofwaterandIputitinthemicrowavetoboil.5.Ihadkeptthewaterinthemicrowaveforthreeminutes.WhenIhadtakenitoutthewaterwasboiling.BeforeIhadputthewaterIhadmadeapredictionthatthewaterwouldturnintosteam.WhenItookthewater

5、outithadn'tturnedintosteamthatshowedthatmypredictionwaswrong.6.IwasgoingtouseathermometerbutthenIrealizedthatthethermometerwasonlyforhumans.Thethermometerwouldonlygohighas106Fandboilingwateris212F.7.Also,IrealizedthatthetimerIhadpickedwon'tworkbecauseitgoesdownandIneedonethatgoesup.8

6、.SoIonlyputintwoglassesofwaterintherefrigeratorandIdidn'ttimethem.Thishelpedmeidentifythecorrectproceduresandinstrumentstouseinmyexperiment.IusedthebookSciencewithwatertohelpmeidentifythedifferenttemperaturesatwhichwaterboilsandfreezes.VocabularyThetemperatureofthewaterinfourbottlesa

7、tthestartoftheexperimentisthemanipulatedvariable.Thetimeittakesforthewaterinthefourbottlestofreezeistherespondingvariable.Theconditionsoftheexperimentarethecontrolledvariables.Inmyexperiment,thecontrolledvariablesare:1.theamountofwaterinthefourbottles2.thekindofbottlesthatareused3.th

8、etemperature