byKittWinstonillustratedbyBillMelvinbyKittWinstonillustratedbyBillMelvinCopyright©byHarcourt,Inc.Allrightsreserved.Nopartofthispublicationmaybereproducedortransmittedinanyformorbyanymeans,electronicormechanical,includingphotocopy,recording,oranyinformationstorageandretrievalsystem,withoutpermissioninwritingfromthepublisher.RequestsforpermissiontomakecopiesofanypartoftheworkshouldbeaddressedtoSchoolPermissionsandCopyrights,Harcourt,Inc.,6277SeaHarborDrive,Orlando,Florida32887-6777.Fax:407-345-2418.HARCOURTandtheHarcourtLogoaretrademarksofHarcourt,Inc.,registeredintheUnitedStatesofAmericaand/orotherjurisdictions.PrintedintheUnitedStatesofAmericaISBN10:0-15-350506-0ISBN13:978-0-15-350506-5OrderingOptionsISBN10:0-15-350333-5(Grade3Below-LevelCollection)ISBN13:978-0-15-350333-7(Grade3Below-LevelCollection)ISBN10:0-15-357494-1(packageof5)ISBN13:978-0-15-357494-8(packageof5)Ifyouhavereceivedthesematerialsasexaminationcopiesfreeofcharge,HarcourtSchoolPublishersretainstitletothematerialsandtheymaynotberesold.Resaleofexaminationcopiesisstrictlyprohibitedandisillegal.Possessionofthispublicationinprintformatdoesnotentitleuserstoconvertthispublication,oranyportionofit,intoelectronicformat.1234567891017912111009080706Onaclearnight,themoonshinesbrightly.Youmightthinkthatthemoongivesofflight,butitdoesnot.Lightfromthesunreflectsoffthemoon’ssurface.Sometimesthemoonlookslikealargeball.Othertimes,itlookslikeatinysliver.Myths,orlegends,weremadeupbyearlypeopletoexplainwhythemoonchangesshape.3TheearlypeopleofGreenlandthoughtthesungoddesswaschasingherbrother,themoongod,acrossthesky.GreenlandisanislandinNorthAmerica.Themoongodransomuchthatheforgottoeat.Asdayspassed,hebecamethinner.Finally,themoongodhadtostopandeat.Hegotbigger.Thechasebeganalloveragain.4Todaypeopleunderstandwhytheshapeofthemoonchanges.Thechangesarecausedbythewaythemoonmovesinspace.Themoonmovesintwoways.Itrotates,orspinsaroundlikeatop.Ittakesthemoonabouttwenty-ninedaystorotateonce.ItalsotravelsinapatharoundEarthcalledano...
