Grade2•Unit3•Week11Copyright©TheMcGraw-HillCompanies,Inc.Photosby(l)MichaelNewman/PhotoEdit,(r)AndersonRoss/BlendImages/CorbisForcesatWorkGuidedRetellingWhatisaforce?Wherecanyouseeforces?Whatforcesareshowninthesepictures?ModeledRetellingForcespushorpullobjects.Forceschangehowobjectsmove.Forcesareeverywhere.Youuseaforcewhenyoupushaswing.Pullingthehandleofawagonmakesitmove.BeginningWhatistheboypushing?Whatisthegirlpulling.Theseare.IntermediateWhatkindofforceistheboyusing?Howdoforceschangeobjects?AdvancedWhatdoesaforcedo?Describetheforcesyouseehere.ENGLISHLANGUAGELEARNERSGrade2•Unit3•Week12Copyright©TheMcGraw-HillCompanies,Inc.PhotobyJuiceImages/CorbisForcesatWorkGuidedRetellingWhatisgravity?Howdoesgravityaffectthings?Toliftatomato,whatmustyoudo?ModeledRetellingGravityisaforcethatpullsobjectstowardtheground.Gravitypullsyou,too.Youhavetopullagainstgravitytoliftatomato.Ifyoudropapencil,gravitypullsitdown.BeginningDoesgravitypullobjectstowardthegroundorthesky?Thegirlpullsagainstgravitytothetomato.IntermediateWhathappenswhenyoudropapencil?Whatmakesithappen?AdvancedWhatisgravity?Whatdoesitdo?Explainwhyapencilfallswhenyoudropit.ENGLISHLANGUAGELEARNERSGrade2•Unit3•Week13Copyright©TheMcGraw-HillCompanies,Inc.PhotobyGaelConrad/CorbisForcesatWorkGuidedRetellingWhatisfriction?Howdoesfrictionaffectthegirl?ModeledRetellingFrictionisaforcethatmakesobjectsmovemoreslowly.Frictionhappenswhenobjectsrubagainsteachother.Gravitypullsthegirldowntheslide.Butthefrictionbetweenthegirl’sclothesandtheslideslowsherdown.BeginningWhatpullsthegirldowntheslide—gravityorfriction?Whatslowsherdown?IntermediateWhatdoesfrictiondotoobjects?Whatcreatesfrictionbetweenthegirlandtheslide?AdvancedExplainwhatcausesfriction.Howaregravityandfrictionthesame?ENGLISHLANGUAGELEARNERSGrade2•Unit3•Week14Copyright©TheMcGraw-HillCompanies,Inc.PhotobyGreer&Associates,Inc./SuperStockForcesatWorkGuidedRetellingWhatistheboydoing?Howdoesfrictionhelphim?ModeledRetellingFrictionhelpstheskater.Hewouldslipwithoutfrictionbetweenthewheelsandthepath.Theskaterputsthestopperonhisskatedown.Frictionbetweenthestopperandthepathmakeshimstop.BeginningWhatdoesfrictionhelptheskatertodo?IntermediateWhereisthefriction?Whatmakestheskaterstop?AdvancedWhatwouldhappentotheskaterwithoutfriction?Explainhowfrictionhelpstheskaterstop.ENGLISHLANGUAGELEARNERSGrade2•Unit3•Week15Copyright©TheMcGraw-HillCompanies,Inc.PhotobyJohnBiever/SportsIllustrated/GettyImagesForcesatWorkGuidedRetellingHowdoswimmers’capsandsuitshelpthem?ModeledRetellingSometimeswewantlessfriction.Swimmerswearsmoothcapsandsuits.Thismakeslessfriction.Thishelpsthemswimfasterinthewater.Forcesareeverywhere!BeginningWhatdoswimmerswear?Dothecapandsuitmakelessfrictionormorefriction?IntermediateWhatdoswimmerswearataswimmeet?Howdoesthishelpthem?AdvancedWhydoswimmerswantlessfriction?Howdoswimmers’capsandsuitshelpthemgofaster?ENGLISHLANGUAGELEARNERS
