ExpositoryTextPAIREDREADSuper-visionbyRachelHaywardbyRachelHaywardSecretsoftheIceSTRATEGIES&SKILLSAPhotographyCredit:ARCTICIMAGES/Alamy**Thetotalwordcountisbasedonwordsintherunningtextandheadingsonly.Numeralsandwordsincaptions,labels,diagrams,charts,andsidebarsarenotincluded.ComprehensionStrategy:SummarizeSkill:SequenceVocabularyStrategyAntonymsVocabularyclings,dissolve,gritty,humid,magnify,microscope,mingle,typicalContentStandardsSciencePhysicalScienceWordCount:987**Copyright©TheMcGraw-HillCompanies,Inc.Allrightsreserved.Nopartofthispublicationmaybereproducedordistributedinanyformorbyanymeans,orstoredinadatabaseorretrievalsystem,withoutthepriorwrittenconsentofTheMcGraw-HillCompanies,Inc.,including,butnotlimitedto,networkstorageortransmission,orbroadcastfordistancelearning.Sendallinquiriesto:McGraw-HillEducationTwoPennPlazaNewYork,NewYork10121ISBN:978-0-02-119126-0MHID:0-02-119126-3PrintedintheUnitedStates.123456789QLM151413121110byRachelHaywardPAIREDREADChapter1ThePropertiesofWater...............2Chapter2SnowandIce.........................6Chapter3LookingCloselyatIce................10RespondtoReading.................15Super-vision.................16Glossary/Index.......................19FocusonScience............20EssentialQuestionWhatcanyoudiscoverwhenyoulookcloselyatsomething?SecretsoftheIceKennethG.LibbrechtWateroccursnaturallyonEarthasaliquid,asolid,andagas.CHAPTER1ThePropertiesofWaterWhatisclear,wet,andrunsoutofafaucet?Whatiscold,hard,andfloatsinyourglass?Whatisinvisibleandhangsintheair?Theansweriswater.Watercanbealiquid(water),asolid(ice),oragas(vapor).2(bl)BrandXPictures/Punchstock(br)81a/AgeFotostockWhenwaterisaliquid,thingsdissolveiniteasily.Salt,sugar,andsomegasesdissolveinwater.Whenwatergetsverycold,itfreezesandbecomesice.Mostthingsshrinkwhentheyfreeze.Butifyoufreezeaglassbottlefilledwithwater,thewaterexpandsandthebottlecracks.Whenwaterisagas,orvapor,itisusuallyinvisible.Airwithalotofwatervaporinitfeelsstickyandhumid.3(tc)MartynF.Chillmaid/PhotoResea...
