byLouisManningCover,p.4,©Corbis;p.3,©PhotoDisc;p.5,p.9,p.11,BartVallecoccia;p.6,p.14,©DavidYoung-Wolff/PhotoEdit;p.7,©HarcourtIndex;p.8,©TimPannell/Corbis;p.10,©ImageSource/SuperStock;p.12,©SUZIESZTERHAS/MindenPictures;p.13,©BananaStock/PunchStock.Copyright©byHarcourt,Inc.Allrightsreserved.Nopartofthispublicationmaybereproducedortransmittedinanyformorbyanymeans,electronicormechanical,includingphotocopy,recording,oranyinformationstorageandretrievalsystem,withoutpermissioninwritingfromthepublisher.RequestsforpermissiontomakecopiesofanypartoftheworkshouldbeaddressedtoSchoolPermissionsandCopyrights,Harcourt,Inc.,6277SeaHarborDrive,Orlando,Florida32887-6777.Fax:407-345-2418.HARCOURTandtheHarcourtLogoaretrademarksofHarcourt,Inc.,registeredintheUnitedStatesofAmericaand/orotherjurisdictions.PrintedintheUnitedStatesofAmericaISBN10:0-15-350485-4ISBN13:978-0-15-350485-3OrderingOptionsISBN10:0-15-350333-5(Grade3Below-LevelCollection)ISBN13:978-0-15-350333-7(Grade3Below-LevelCollection)ISBN10:0-15-357469-0(packageof5)ISBN13:978-0-15-357469-6(packageof5)Ifyouhavereceivedthesematerialsasexaminationcopiesfreeofcharge,HarcourtSchoolPublishersretainstitletothematerialsandtheymaynotberesold.Resaleofexaminationcopiesisstrictlyprohibitedandisillegal.Possessionofthispublicationinprintformatdoesnotentitleuserstoconvertthispublication,oranyportionofit,intoelectronicformat.1234567891017912111009080706byLouisManningIt’ssummer.Seethebeautifulbluesky,smelltheflowers,andhearthebeesbuzz.Feelthewarmsun,andtasteasweetpeach.Youareusingyoursenses.Sensessendmessagestoyourbrainandhelpyoucommunicatewiththeworld.Sensesalertyoutodanger,buttheyalsomakeyouhappy.3SeeYoureyeislikeacamera.Lookatsomething.Lightbouncesoffofit,andthelightentersyourpupil.That’stheblackdotinthecenterofyoureye.Thelens,whichisbehindthepupil,bendsthelight.Thenthelightgoestoyourretina.4Theretinahasmillionsofnerves.Somearecalledrods.Theyseeshapes,andtheyseeblackandwhite.Theothernervesarecalledcones,andtheyseecolors.Theret...
