高中英语《Unit4 Astronomy the science of the stars》教案（6）新人教版必修3-新人教版高一必修3英语教案VIP免费

TheSixthperiodUsingLanguageTeachinggoals教学目标1.Abilitygoals能力目标PracticeSs’sabiltyoflisteningandreading2.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Arecorder,acomputerandaprojector.Teachingprocedures&ways教学过程与方式StepILeadinT:Wehavelearntalotaboutastronomy,haveyougotinterestedinit?Ifyouaregoingtostudyastronomy,whatproblemwillyoufacemost?S2:Gravity.T:Whatisgravity?S3:Everythingwillfallbacktotheearthifitisdroppedorthrownaway.Thepulloftheearthiscalledgravity.T:Quiteright.Whofirstgottheideaofgravity?S4:IsaacNewton.T:Howdidhegettheidea?S5:Onedayhewassittingunderthetree.Hesawanapplefall,whichmadehimgettheidea.BesidesNewton,arethereanyotherscientistswhomadeagreatcontributiontotheideaofgravity?S6:AlbertEinstein,StephenHawking.T:Howdideachofthemthinkofgravity?Ordidtheysharethesameideaofgravity?Comeon,thetapewilltellyou.StepIIListening1.Listentothetapeandchoosethebestmainideaofthelisteningpassage(Ex.2P30).Mainidea:AThetextisabouthowthreescientistswantedtofindoutaboutthebeginningoftheuniverse.BThetextisabouthowtheideaofgravityhasdevelopedoveralongperiodoftime.CThetextisabouttheimportanceofthreescientistsandtheirworkThebestanswer:SummaryBiscorrectbecauseitgivesaclearideaofwhatthelisteningpassageisabout.ListentothetapeagainandfillinthechartinEx.3onP30.(Note:Astronomersandscientiststhinkthatablackholeisaregionofspace(notathing)intowhichmatterhasfallenandfromwhichnothingcanescape—notevenlight.Sowecan’tseeablackhole.Ablackholeexertsastronggravitationalpullandyetithasnomatter.Itisonlyspace-orsowethink.)StepIIIReading1.passageunderstandingT:AllthethreegreatscientistsNewton,EinsteinandHawkingplayedanimportantroleinthedevelopmentofideasofgravity.Wouldyouliketoknowmoreaboutgravity?IsaacNewtonAlbertEinsteinStephenHawkingIdeaLargebodieshaveaforcewhichpullsthingstowardsthem.Inspacelargeobjectsmakespaceandtimebend;thelargertheobject,thefurtherspaceandtimebend.Blackholeshaveaverylargemassandpullthingstowardsthem.DevelopmentThebiggertheobjectthestrongerthegravity.Timegoesslowerinverystronggravity.Ifyougoovertheedge,youcannotgetout;butifyoudonot,youmaybeabletoescape.Ss:Yes.T:Isthemoon’sgravitythesameasthatoftheearth?S1:No.T:ReadthepassageandthendescribethethreewaysinwhichgravitychangedforLiYanpingandhowhisweightchanged.Ss:1.Thepullofgravitybecameverystronghelefttheearth’satmosphere.Hisweightisnormal.2.Itdisappearedwhenhewasinspace.Heisweightless.3.Itwasverylightwhenhewasonthemoon.Heweighslessthanonearth.2.Languagepoints1....“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.Wewatched,amazedasfirebrokeoutontheoutsideofthespaceshipastheearth’sgravityincreased.breakout它与happen,takeplace,comeout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.TheAmericanCivilWarbrokeoutin1861.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.Afirebrokeoutinhishouselastnight.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.