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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’sabiltyoflisteningandreading
2.Learningabilitygoals学能目标EnableSstogetknowledgeofgreatscientistsandscienceTeachingimportantpoints教学重点a.thethreescientists’differentideasandtheresultoftheirworkb.theexperienceofLiYaping’svisittothemoonTeachingdifficultpoints教学难点Understandthelisteningtext.Teachingaids教具准备Arecorderaputerandaprojector.Teachingproceduresways教学过程与方式StepILeadinT:WehavelearntalotaboutastronomyhaveyougotinterestedinitIfyouaregoingtostudyastronomywhatproblemwillyoufacemostS2:Gravity.T:WhatisgravityS3:Everythingwillfallbacktotheearthifitisdroppedorthrownaway.Thepulloftheearthiscalledgravity.T:Quiteright.WhofirstgottheideaofgravityS4:IsaacNewton.T:HowdidhegettheideaS5:Onedayhewassittingunderthetree.Hesawanapplefallwhichmadehimgettheidea.BesidesNewtonarethereanyotherscientistswhomadeagreatcontributiontotheideaofgravityS6:AlbertEinsteinStephenHawking.T:HowdideachofthemthinkofgravityOrdidtheysharethesameideaofgravityeonthetapewilltellyou.StepIIListening
1.ListentothetapeandchoosethebestmainideaofthelisteningpassageEx.2P
30.Mainidea:AThetextisabouthowthreescientistswantedtofindoutaboutthebeginningoftheuniverse.BThetextisabouthowtheideaofgravityhasdevelopedoveralongperiodoftime.CThetextisabouttheimportanceofthreescientistsandtheirworkThebestanswer:SummaryBiscorrectbecauseitgivesaclearideaofwhatthelisteningpassageisabout.ListentothetapeagainandfillinthechartinEx.3onP
30.IsaacNewtonAlbertEinsteinStephenHawkingIdeaLargebodieshaveaforcewhichpullsthingstowardsthem.Inspacelargeobjectsmakespaceandtimebend;thelargertheobjectthefurtherspaceandtimebend.Blackholeshaveaverylargemassandpullthingstowardsthem.DevelopmentThebiggertheobjectthestrongerthegravity.Timegoesslowerinverystronggravity.Ifyougoovertheedgeyoucannotgetout;butifyoudonotyoumaybeabletoescape.Note:Astronomersandscientiststhinkthatablackholeisaregionofspacenotathingintowhichmatterhasfallenandfromwhichnothingcanescape—notevenlight.Sowecan’tseeablackhole.Ablackholeexertsastronggravitationalpullandyetithasnomatter.Itisonlyspace-orsowethink.StepIII Reading
1.passageunderstandingT:AllthethreegreatscientistsNewtonEinsteinandHawkingplayedanimportantroleinthedevelopmentofideasofgravity.WouldyouliketoknowmoreaboutgravitySs:Yes.T:Isthemoon’sgravitythesameasthatoftheearthS1:No.T:ReadthepassageandthendescribethethreewaysinwhichgravitychangedforLiYanpingandhowhisweightchanged.Ss:
1.Thepullofgravitybecameverystronghelefttheearth’satmosphere.Hisweightisnormal.
2.Itdisappearedwhenhewasinspace.Heisweightless.
3.Itwasverylightwhenhewasonthemoon.Heweighslessthanonearth.
2.Languagepoints
1....“walkingdoesneedabitofpracticenowthatgravityhaschanged.”......既然引力改变了,走路也的确需要练一练了nowthat同since相似,语气较弱,强调人们已知的事实
2.Wewatchedamazedasfirebrokeoutontheoutsideofthespaceshipastheearth’sgravityincreased.breakout它与happentakeplaceeout等词的用法一样,是不及物动词,不能带宾语,不能用于被动语态1战争爆发e.g.TheAmericanCivilWarbrokeoutin
1861.美国内战爆发于1861年2发生争吵e.g.Aquarrelbrokeoutbetweenthem.他们之间发生了争吵3火灾发生 e.g.A fire broke out in his house last night. 昨晚他家里失火了[考点]breakout通常指战争、疾病、灾害等的爆发不及物动词短语,不能用于被动语态与break相关的短语:breakdown打破;毁掉;破除;坍塌;坏掉breakin破门而入;打断breakawayfrom脱离;打破陈规breakthrough突围;突破;冲垮;克服breakup打碎;拆散;分裂;分解breakone’sword/promise食言;说话不算数StepIVHomeworkCollectpassagesaboutgravity.Prepareforspeaking.。