2019-2020年高中英语Unit4Astronomythescienceofthestars第5课时导学案新人教必修3.doc

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1、2019-2020年高中英语Unit4Astronomythescienceofthestars（第5课时）导学案新人教必修3第5课时第17周周二Teachinggoals学习目标1.Abilitygoals能力目标PracticeSs’sabiltyoflisteningandreading2.Learningabilitygoals学能目标EnableSstogetknowledgeofgreatscientistsandscienceTeachingimportantpoints教学重点a.thethreesc

2、ientists’differentideasandtheresultoftheirworkb.theexperienceofLiYaping’svisittothemoonTeachingdifficultpoints教学难点Understandthelisteningtext.Teachingaids教具准备Arecorder,aputerandaprojector.Teachingprocedures&ways教学过程与方式StepILeadinT:Wehavelearntalotaboutastronomy,

3、haveyougotinterestedinit?Ifyouaregoingtostudyastronomy,whatproblemwillyoufacemost?S2:Gravity.T:Whatisgravity?S3:Everythingwillfallbacktotheearthifitisdroppedorthrownaway.Thepulloftheearthiscalledgravity.T:Quiteright.Whofirstgottheideaofgravity?S4:IsaacNewton.T:

4、Howdidhegettheidea?S5:Onedayhewassittingunderthetree.Hesawanapplefall,whichmadehimgettheidea.BesidesNewton,arethereanyotherscientistswhomadeagreatcontributiontotheideaofgravity?S6:AlbertEinstein,StephenHawking.T:Howdideachofthemthinkofgravity?Ordidtheysharethes

5、ameideaofgravity?eon,thetapewilltellyou.StepIIListening1.Listentothetapeandchoosethebestmainideaofthelisteningpassage(Ex.2P30).Mainidea:AThetextisabouthowthreescientistswantedtofindoutaboutthebeginningoftheuniverse.BThetextisabouthowtheideaofgravityhasdeveloped

6、overalongperiodoftime.CThetextisabouttheimportanceofthreescientistsandtheirworkThebestanswer:SummaryBiscorrectbecauseitgivesaclearideaofwhatthelisteningpassageisabout.ListentothetapeagainandfillinthechartinEx.3onP30.IsaacNewtonAlbertEinsteinStephenHawkingIdeaLa

7、rgebodieshaveaforcewhichpullsthingstowardsthem.Inspacelargeobjectsmakespaceandtimebend;thelargertheobject,thefurtherspaceandtimebend.Blackholeshaveaverylargemassandpullthingstowardsthem.DevelopmentThebiggertheobjectthestrongerthegravity.Timegoesslowerinverystro

8、nggravity.Ifyougoovertheedge,youcannotgetout;butifyoudonot,youmaybeabletoescape.(Note:Astronomersandscientiststhinkthatablackholeisaregionofspace(notathing)intowhichmatterha