高一英语（下）必修三unit 4 period 3-4 教案

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1、Period3-4Usinglanguage$ReadingtaskStep1.LeadinT:Wehavelearntalotaboutastronomy,haveyougotinterestedinit?Ifyouaregoingtostudyastronomy,whatproblemwillyoufacemost?S2:Gravity.T:Whatisgravity?S3:Everythingwillfallbacktotheearthifitisdroppedorthrownaway.Thepulloftheearthiscal

2、ledgravity.T:Quiteright.Whofirstgottheideaofgravity?S4:IsaacNewton.T:Howdidhegettheidea?S5:Onedayhewassittingunderthetree.Hesawanapplefall,whichmadehimgettheidea.BesidesNewton,arethereanyotherscientistswhomadeagreatcontributiontotheideaofgravity?S6:AlbertEinstein,Stephen

3、Hawking.T:Howdideachofthemthinkofgravity?Ordidtheysharethesameideaofgravity?Comeon,thetapewilltellyou.Step2Listening1.Listentothetapeandchoosethebestmainideaofthelisteningpassage(Ex.2P30).Mainidea:①Iheardabouthowthreemenmademistakeswhentheytriedtodescribegravity.②Ihearda

4、bouthowthreemenwantedtofindoutaboutthebeginningoftheuniverse.③Iheardabouthowtheideaofgravityhasdevelopedoveralongperiodoftime.④Iheardaboutthreescientistsandtheirwork.Thebestanswer:③2.ListentothetapeagainandfillinthechartinEx.1onP30.IsaacNewtonAlbertEinsteinStephenHawking

5、Dates1642-17271879-19551942-IdeaEverythingisaffectedbyaforcecalledgravityGravityisconnectedtotimeandspace“Blackholes”“eat”objectsbutalso“spit”themoutOtherinformationItwasonlyabouttheearthItwasabouttheuniverseItwasaboutthingsfoundintheuniversecalled“blackholes”Step3.Readi

6、ng1.FastreadingT:AllthethreegreatscientistsNewton,EinsteinandHawkingplayedanimportantroleinthedevelopmentofideasofgravity.Wouldyouliketoknowmoreaboutgravity?Ss:Yes.T:Isthemoon’sgravitythesameasthatoftheearth?S1:No.T:Readfasttoseehowmanytimeswouldtheforceofgravitychange?单

7、位：湖北省荆门　姓名：李国　E_mail：liguo619@sina.comS2:Three.2.CarefulreadingT:Whatarethethreetimes?Howwouldtheforceofgravitychange?Andhowdidourweightchange?LeavetheearthVerystrongVeryheavyInspaceDisappearedFloatedweightlesslyOnthemoonVerylightThemasswillbeless3.SummaryT:Good!Iamsurey

8、oumustknowmoreaboutthegravity.Supposeyouareaskedtomakeasummaryaboutthetrip,willyoutry?Youonlyneedtofill