byBeauWrightË|xHSKBPDy501104zv*:+:!:+:!>ISBN-13:978-0-15-350110-4ISBN-10:0-15-350110-3GRADE3Lesson28WORDCOUNT519GENREExpositoryNonfictionLEVELELLHarcourtLeveledReadersOnlineDatabaseCover,Telescope;p.3,p.4,p.13,©MauroFermariello/PhotoResearchers,Inc.;p.5,©AntonioMo/Taxi/GettyImages;p.6,©PhilippePsaila/PhotoResearchers,Inc.;p.7,©PhotoDisc/PunchStock;p.8,©PascalGoetgheluck/PhotoResearchers,Inc.;p.9,©FrankZullo/PhotoResearchers,Inc.;p.10,©CORBIS/PUNCHSTOCK;p.11,©RichardT.Nowitz/CORBIS;p.12,©Corbis;p.14,©DavidYoung-Wolff/PhotoEdit.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.PrintedinChinaISBN10:0-15-350110-3ISBN13:978-0-15-350110-4OrderingOptionsISBN10:0-15-349938-9(Grade3ELLCollection)ISBN13:978-0-15-349938-8(Grade3ELLCollection)ISBN10:0-15-357268-X(packageof5)ISBN13:978-0-15-357268-5(packageof5)Ifyouhavereceivedthesematerialsasexaminationcopiesfreeofcharge,HarcourtSchoolPublishersretainstitletothematerialsandtheymaynotberesold.Resaleofexaminationcopiesisstrictlyprohibitedandisillegal.Possessionofthispublicationinprintformatdoesnotentitleuserstoconvertthispublication,oranyportionofit,intoelectronicformat.1234567891098512111009080706byBeauWrightScientistsmakenewdiscoverieseveryday.Ascientistmightdiscoveranewmedicineorevenanewplanetinspace!Thesediscoveriesdonothappenbyaccident.Scientistsgothroughthesamestepseverytimetheydoanexperiment.Thestepsarepartofthescientificmethod.Thescientificmethodhelpsscientiststesttheirideas.3Scientistsbeginbyaskingaquestionaboutsomethin...
