新课标必修3_UNIT4_a_visit_to_the_moon_阅读课件.ppt

《新课标必修3_UNIT4_a_visit_to_the_moon_阅读课件.ppt》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、UNIT4AvisittothemoonDoyouwanttogotothemoon?Imaginewhatyouwillfeelwhenyouareinspace?Howdoestheforceofgravitychangeifyouvisitthemoon?gravity:forcethatattractsobjectsinspacetowardseachother.万有引力，重力，地心引力Whatistheearth’snaturalsatellite?Themoon.（自然卫星）thenaturalforcethatcausesanobjecttomovet

2、owardthecentreoftheearth.GravityThepulloftheearth’sgravitywilldisappearwhenyouareinspace.Youwillbeweightless.Thegravityofthemoonisverylight.Youwillweighlessthanontheearth.Spacewalk2..Ittakesthemoononedaytomovearoundtheearth.3.Theearthistheonlyplanetmovingaroundthesun.TrueorFalseTheeart

3、hmovesaroundthesun.TFFF4.Thereisatmosphereonthemoon.1._____wasthefirstpersonlandingonthemoon?A.ArmstrongB.YangliweiC.TomCruiseD.IssacNewton2.Whendidhelandonthemoon?A.1921B.1969C.1954D.19493.WhendidYangLiweigotothespace?A.Oct,2003B.Jan,2003C.Oct,2004D.Jan,2002ABAthefirstmaninspaceYuriGa

4、garinThefirstmanonthemoonNeilArmstrongRussia1961U.S.A.1969Doyouknowwhotheyare?ReadingAvisittothemoonChinahaslandedonthemoon.Now,let’ssetoutforthemoon!Skimthe4paragraphsquickly,andfindoutthetopicofeachparagraph:Para():Para():Para():Para():ThethingsIdidonthemoon.Weturnedbacktotheearth.La

5、stmonth,wevisitedthemoon.Howtheforceofgravitychangedwhenwetraveledfromtheearthtothemoon.1243Fastreading:TrueorFalseTheforceofofgravitywouldchangefourtimesontheirjourney.()2.Whentheywereonthemoon,theywouldnotfeelthegravitybecausetherewasnogravityonthemoon.()3.Sincethegravityhaschanged,t

6、heirwalkdidn’tneedalotofpractice.()FFFDetailedreading:ReadPara2carefullyandunderline3sentencesthatshowthechangesofthegravity.asheleftinspaceonthemoon)thewaygravitychangedlefttheearthinspaceonthemoonItbecameverylight.Thegravitybecameverystrong.Thegravitydisappeared.lefttheearthInspaceOn

7、themoonTheweightchangedHebecameveryheavy.Hehadnoweightandcouldfloatweightlesslyaroundintheirspaceship.Hewasaboutone-sixthofhisweightontheearth.Readthepassageandfillintheform.ThethreewaysinwhichgravitychangedforLiYanpingandhowhisweightchanged.1.Thepullofgravitybecameverystrongsheleftt