interactivestudenteditionNewYork,NewYorkColumbus,OhioChicago,IllinoisPeoria,IllinoisWoodlandHills,CaliforniaFocusOnPhysicalScienceThePalomarObservatoryinnorthSanDiegoCountyishometomanytelescopesincludingtheHaleTelescope.The5.1mHaleTelescopeisusednightlyforastronomicalstudies.Copyright©2007byTheMcGraw-HillCompanies,Inc.Allrightsreserved.ExceptaspermittedundertheUnitedStatesCopyrightAct,nopartofthispublicationmaybereproducedordistributedinanyformorbyanymeans,orstoredinadatabaseorretrievalsystem,withoutpriorwrittenpermissionofthepublisher.TheNationalGeographicfeaturesweredesignedanddevelopedbyNationalGeographic’sChildren’sBooksandEducationDivision.Copyright©NationalGeographic.Thename“NationalGeographic”andtheYellowBorderRectanglearetrademarksofNationalGeographicandtheiruse,withoutpriorwrittenpermission,isstrictlyprohibited.Sendallinquiriesto:Glencoe/McGraw-Hill8787OrionPlaceColumbus,OH43240-4027ISBN-13:978-0-07-879440-7ISBN-10:0-07-879440-4PrintedintheUnitedStatesofAmerica.345678910079/04310090807SciencenlinenlineStudyTools••InteractiveTables•InteractiveTimeLine•AnimatedIllustrations•LessonSelf-CheckQuizzes•ChapterTestPractice•StandardizedTestPractice•VocabularyPuzzleMaker•InteractiveTutor•MultilingualScienceGlossary•StudytoGo•OnlineStudentEdition•BrainPopMoviesExtensions•VirtualLabs•MicroscopyLinks•PeriodicTableLinks•CareerLinks•PrescreenedWebLinks•WebQuestProject•ScienceFairIdeas•InternetLabsForTeachers•TeacherBulletinBoard•TeachingToday,andmuchmore!CheckoutthefollowingfeaturesonyourOnlineLearningCenter:ca8.msscience.comiiiIntroductiontoInvestigationandExperimentation...............................29.a,9.b,9.c,9.e,9.f,9.gUnit1MotionandForces.....................42Chapter1Motion...........................441.a,1.b,1.c,1.d,1.e,1.f,9.b,9.d,9.e,9.fChapter2Forces...........................842.a,2.b,2.c,2.d,2.e,2.f,9.a,9.d,9.gChapter3DensityandBuoyancy..........1268.a,8.b,8.c,8.d,9.fUnit2StructureofMatter...................168Chapter4Underst...
