新课标必修3 UNIT4 a visit to the moon 阅读ppt课件

.,UNIT4Avisittothemoon,.,Doyouwanttogotothemoon?Imaginewhatyouwillfeelwhenyouareinspace?,.,Thepulloftheearthsgravitywilldisappearwhenyouareinspace.Youwillbeweightless.,Thegravityofthemoonisverylight.Youwillweighlessthanontheearth.,.,Thegravityonthemoonis1/6asstrongasitisonearth.Thismeansthatsomeonewhoweighs150lbs(磅)onEarthwouldweighonly25lbsonthemoon!Youmightthinkthatthiswouldmakewalkingmucheasier,butitisactuallyquitedifficultLaterintheApollo(阿波罗)(Moonlanding)mission,astronautsdiscoveredthatitwaseasiertohop(跳)thanitwastowalk.,.,Spacewalk,.,2.Ittakesthemoononedaytomovearoundtheearth.,3.Theearthistheonlyplanetmovingaroundthesun.,TrueorFalse,Theearthmovesaroundthesun.,T,F,F,F,4.Thereisatmosphereonthemoon.,.,1._wasthefirstpersonlandingonthemoon?A.ArmstrongB.YangliweiC.TomCruiseD.IssacNewton,2.Whendidhelandonthemoon?A.1921B.1969C.1954D.1949,3.WhendidYangLiweigotothespace?A.Oct,2003B.Jan,2003C.Oct,2004D.Jan,2002,A,B,A,.,thefirstmaninspace,YuriGagarin,Thefirstmanonthemoon,NeilArmstrong,Russia1961,U.S.A.1969,.,Doyouknowwhotheyare?,.,.,.,ReadingAvisittothemoon,Chinaisplanningtolandonthemooninthenearfuture.,.,Fastreading:TrueorFalse,Theforceofofgravitywouldchangefourtimesontheirjourney.()2.Whentheywereonthemoon,theywouldnotfeelthegravitybecausetherewasnogravityonthemoon.()3.Sincethegravityhaschanged,theirwalkdidntneedalotofpractice.(),F,F,F,.,Detailedreading:ReadPara2carefullyandunderline3sentencesthatshowthechangesofthegravity.asheleftinspaceonthemoon),.,Itbecameverylight.,Thegravitybecameverystrong.,Thegravitydisappeared.,.,ThethreewaysinwhichgravitychangedforLiYanpingandhowhisweightchanged.,1.Thepullofgravitybecameverystrongshelefttheearthsatmosphere.Hisweightisnormal.,2.Itdisappearedwhenhewasinspace.Heisweightless.,3.Itwasverylightwhenhewasonthemoon.Heweighslessthanonearth.,.,Wastheirreturningpainful?Whathappenedtothespaceship?,Yes.Firebrokeoutontheoutsideofthespaceship.,Qtwiceasmuch),.,Translation:1.既然你忙,就让我给你做吧。Nowthatyouarebusy,letmedoitforyou.2.既然人都齐了,咱们开始干吧。Nowthateveryoneishereletsstartwork,.,4.nowthat既然；现在/当时,nowthat同since相似，语气较弱，强调人们已知的事实。,Translation:1.既然你忙,就让我给你做吧。Nowthatyouarebusy,letmedoitforyou.2.既然人都齐了,咱们开始干吧。Nowthateveryoneishereletsstartwork,.,1).A+be+倍数+as+形容词原级+as+BThistreeisthreetimesastallasthatone.这棵树是那棵树的三倍高(比高两倍)。Hisfatheristwiceasoldashe.他父亲是他年龄的两倍(大一倍)。,4.ButwhenItriedtostepforward,IfoundIwascarriedtwiceasfarasontheearthandfellover.,.,2).A+be+倍数+形容词比较级+than+BTheYangtzeRiverisalmosttwicelongerthanthePearlRiver.长江几乎比珠江长两倍。Thenumberofthestudentsinourschoolisthreetimeslargerthanthatintheirs.我们学校的学生数量比他们学校的多三倍。,.,3).A+be+倍数+the+名词(size,length,amount)+of+BThenewlybroadenedsquareisfourtimesthesizeofthepreviousone.新扩建的广场是未扩建时的四倍大。,.,Doyouregret_(pay)100dollarsforthepainting?No,Iwouldgladlyhavepaid_(两倍那么多了)forit.(paying;twiceasmuch),.,Howdoestheforceofgravitychangeifyouvisitthemoon?,gravity:forcethatattractsobjectsinspacetowardseachother.万有引力，重力，地心引力,Whatistheearthsnaturalsatellite?,Themoon.,（自然卫星）,.,thenaturalforcethatcausesanobjecttomovetowardthecentreoftheearth.,Gravity,.,Part1:TrueorFalse,Theearthmovesaroundthesun.,T,F,F,F,T,2.Ittakesthemoononedaytomovearoundtheearth.,3.Earthistheonlyplanetmovingaroundthesun.,4.Thereisatmosphereonthemoon.,5.Plutoisthesmallestplanetinsolarsystem?,.,Part2:Multiplechoice:,1._isthenearestplanetfromthesun?A.VenusBMarsC.MercuryD.Uranus,C,2._isthebiggestplanetinthesolarsystem?A.MarsB.PlutoC.EarthD.Jupiter,D,.,3._wasthefirstpersonlandingonthemoon?A.ArmstrongB.YangliweiC.TomCruiseD.IssacNewton,4.Whendidhelandonthemoon?A.1921B.1969C.1954D.1949,5.WhendidYangLiweigotothespace?Oct,2003B.Jan,2003C.Oct,2004D.Jan,2002,A,B,A,.,IsaacNewton,AlbertEinstein,StephenHawking,Doyouknownanyfamousastronomersandtheirtheoryongravity?,.,P30Fastreading:Readthepassagequickly,finishthetrueorfalsequestions:,Theforceofofgravitywouldchangefourtimesontheirjourney.()2.Whentheywereonthemoon,theywouldnotfeelthegravitybecausetherewasnogravityonthemoon.()3.Sincethegravityhaschanged,theirwalkdidntneedalotofpractice.(),F,F,F,.,verystrong,disappeared,verylight,Detailreading:ReadPara2carefullyandunderline3sentencesthatareaboutthechangesoftheforceofthegravity.(asheleft,inspace,onthemoon),Step3,.,Onthemoon,Thechangeofgravity,Inspace,Verystrong,Veryheavy,Disappeared,Floatedweightlessly,Verylight,Leavetheearth,Scanning,.,Listening:Listentothetapeandanswerthefollowingquestions:1.Howmanytimeswouldtheforceofgravitychange?2.Wasthatleavingthemoonsgravityaspainfulasleavingtheearths?,.,Summary:,LastmonthIvisitedthemoonwithmyfriend.Beforeweleft,Iwastoldtheforceofg_wouldchangethreetimesonourjourney.Thenwetookoff.Aswelefttheearth,Ibecameveryh_.graduallytheweightl_.whenIwasinspace,itd_.wef_weightlesslyinthecabinandIc_.wheniwasonthemoon,Iwassurprisedtofindoutevenwalkingneedslotsofpracticen_gravitychanged.Thereturningoftheearthwasveryf_.wewereamazedtowatchfireb_ontheoutsideoftheship.,gravity,heavy,lessened,disappeared,floated,cheeredup,nowthat,frightening,breakout,Step5,.,Summary:,LastmonthIvisitedthemoonwithmyfriend.Beforeweleft,Iwastoldtheforceofg_wouldchangethreetimesonourjourney.Thenwetookoff.Aswelefttheearth,Ibecameveryh_.graduallytheweightl_.whenIwasinspace,itd_.wef_weightlesslyi