PAIREDREADSuper-visionbyRachelHaywardbyRachelHaywardExpositoryTextSecretsoftheIceSTRATEGIES&SKILLSAComprehensionStrategy:SummarizeSkill:SequenceVocabularyStrategyAntonymsVocabularyclings,dissolve,gritty,humid,magnify,microscope,mingle,typicalContentStandardsSciencePhysicalSciencePhotographyCredit:ARCTICIMAGES/Alamy**Thetotalwordcountisbasedonwordsintherunningtextandheadingsonly.Numeralsandwordsincaptions,labels,diagrams,charts,andsidebarsarenotincluded.WordCount:1,342**Copyright©TheMcGraw-HillCompanies,Inc.Allrightsreserved.Nopartofthispublicationmaybereproducedordistributedinanyformorbyanymeans,orstoredinadatabaseorretrievalsystem,withoutthepriorwrittenconsentofTheMcGraw-HillCompanies,Inc.,including,butnotlimitedto,networkstorageortransmission,orbroadcastfordistancelearning.Sendallinquiriesto:McGraw-HillEducationTwoPennPlazaNewYork,NewYork10121ISBN:978-0-02-118753-9MHID:0-02-118753-3PrintedintheUnitedStates.123456789QLM151413121110PAIREDREADChapter1ThePropertiesofWater..................2Chapter2SnowandIce............................6Chapter3LookingCloselyatIce...................10RespondtoReading....................15Super-vision....................16Glossary/Index..........................19FocusonScience...............20EssentialQuestionWhatcanyoudiscoverwhenyoulookcloselyatsomething?byRachelHaywardSecretsoftheIceKennethG.LibbrechtWateristheonlysubstancethatnaturallyoccursonEarthasaliquid,asolid,andagas.CHAPTER1ThePropertiesofWaterWhatisclear,wet,andrunsoutofafaucet?Whatiscold,hard,andfloatsinyourglass?Whatisinvisibleandhangsaroundintheair?Theansweriswater.Thethreestatesofwaterare—water,ice,andwatervapororsteam.Youcanfindwaterinariver,iceonamountain,andwatervaporintheair.2(bl)BrandXPictures/Punchstock(br)81a/AgeFotostockWaterhasotherspecialqualities.Whenitisaliquid,substancesdissolveiniteasily.Salt,sugar,andgases,suchasoxygenandcarbondioxidealldissolveinwater.Whenwatercoolsto32degreesFahrenheit,itfreezesandbecomesice.Mostsubstancesshrinkwhentheyfreeze,butwat...
