InformationalTextbyBeverlyHarrisPAIREDREADMachinestoPushandPullSTRATEGIES&SKILLSAPhotographyCredit:CoverImageSource/GaelConrad/CORBIS**Thetotalwordcountisbasedonwordsintherunningtextandheadingsonly.Numeralsandwordsincaptions,labels,diagrams,charts,andsidebarsarenotincluded.ComprehensionStrategy:RereadSkill:Author’sPurposePhonicsLonga:a,ai,ay,ea,ei,eigh,eyVocabularyStrategySimilesVocabularyamazing,force,measure,objects,proved,speed,true,weightELLVocabularyrub,smoothContentStandardsSciencePhysicalScienceWordcount:521**Copyright©TheMcGraw-HillCompanies,Inc.Allrightsreserved.Nopartofthispublicationmaybereproducedordistributedinanyformorbyanymeans,orstoredinadatabaseorretrievalsystem,withoutthepriorwrittenconsentofTheMcGraw-HillCompanies,Inc.,including,butnotlimitedto,networkstorageortransmission,orbroadcastfordistancelearning.Sendallinquiriesto:McGraw-HillEducationTwoPennPlazaNewYork,NewYork10121ISBN:978-0-02-118881-9MHID:0-02-118881-5PrintedintheUnitedStates.12345678DOC171615141312PAIREDREADChapter1Forces............................2Chapter2FrictionatthePark................6Chapter3FrictionandStopping..............10Chapter4LessFriction......................13RespondtoReading...............15MachinestoPushandPull..16Glossary/Index....................19FocusonScience...........20EssentialQuestionHowdotheearth’sforcesaffectus?GenreInformationalTextbyBeverlyHarrisAforcepushesorpullsanobject.Forceschangehowobjectsmove.Youcanseeforceseverywhere.Theboypusheshisfriend.Pushingisaforce.CHAPTER1swing2MichaelNewman/PhotoEditAdooropenswhenyoupushit.Acartmovesifyoupushit.Adraweropensifyoupullit.Pullingisaforce,too.Pullingonthewagonmakesitmove.Doorisanounthatnamesathing.Findanothernounonthispage.wagon3AndersonRoss/BlendImages/CORBISGravityisaforce.Itpullsobjectstowardtheground.Gravitypullsyou!Dropapencil.Whathappened?Thepencilfell.Why?Gravitypulleditdown.Youprovedthatit’strue!Gravitypullsobjects,liketomatoes,towardtheground.scaletomato4JuiceImages/CORBISpushingforcefrictionST...
