Unit 4 Astronomy_ the science of the stars教案教学设计精品08（人教版高中英语必修三)13页

Unit4Astronomy:thescienceofthestarsTeachingaims:1.Enablestudentstoimprovetheirlisteningskillsandreadingability.2.Enablestudentstounderstandthedevelopmentofgravityandhowgravityaffectsusindifferenttimesandplaces.3.Arousestudents’interesttosearchforthemysteryofspace.Emphasis:1.Wordsandexpressions:gravity,float,cheerup,nowthat,breakout,etc2.Astronomicknowledgelikegravityandblackhole.Difficulties:1.Helpthestudentstounderstandthedevelopmentofgravity.2.Helpthestudentstoknowhowgravityinfluencesus.Teachingmethods:skimming,scanning,discussing.Teachingaids:ataperecorder,aprojectorandacomputer.Teachingprocedures:PeriodoneReadingStep1.PresentationT:Hello,everyone!Todaywe’llcometoUnit4Astronomy.BeforethatIhaveaquestion:Wheredowecomefrom?Orwecansay:Whoareourancestors?S1:Monkeys!S2:BeijingRenwholivedmanyyearsago.S3:Reptiles.S4:Mammals.S5:Amphibians.S6:Dinosaurs.T:Verygood!Canyouputtheminrightorder? S7:Amphibians,Reptiles,Dinosaurs,Mammals,BeijingRen.T:Doyouknowwhatitwaslikebeforelifeappearedonearth?S8:Itwasfullofwater,perhaps.T:Beforethat,whatwasitlike?S9:Sorry,Idon’tknow.T:Doyouwanttogetmoreinformation?Todaywe’lllearnsomethingaboutHowLifeBeganontheEarth.TurntoPage25.Let’scometoWarmingupfirst.Step2.Warmingup1.Readthethreequestions,whilethestudentslistenandfollow.2.GivetheSsseveralminutestodiscussthequestions.3.Collectanswersfromthewholeclass.4.Checktheanswerswhilediscussing.T:I’llreadthethreequestionsforyou.Youshouldlistentomecarefully.(Ifstudentsdon’tknowhowtodiscuss,showthemanexample.)Forexample,medicine.Whensomeonegetsseriousillness,hewillgotothehospital.Thedoctorwillexaminehim.Hewilltakehistemperature,measurehisbloodpressureandgivehimanX-ray,oraCT.Forthewholeprocessoftheexamination,whatkindofsciencehasbeenused?S1:Biology.S2:Chemistry.T:Sowecansaymedicinecombinesbiologyandchemistry.Whataboutbiochemistryandgeophysics?S3:Ithinkbiochemistrycombinesbiologyandchemistry.S4:Geophysicscombinesgeologyandphysics.T:Whataboutastronomy?S5:Physics.S6:Mathematics.T:Verygood.Weshouldknowthatastronomyisamultidisciplinarysubjectandifwewanttodosomeresearchonit,weshouldknowmanysciencesubjectsrelatedtoit.Nowdiscussthesecondquestion: Whatdowemeanwhenwesaywearestudyingasubjectscientifically?Orwhat’sthecorrectattitudetowardsscience?S7:Weshouldbeobjective,notsuperstitious.T:What’sthecorrectwaytoproveascientificidea?S8:Weshoulddesignexperimentstotestitforseveraltimes.S9:Thenwecananalyzetheresultsanddrawaconclusionatlast.T:Let’ssumuptheanswers.Tostudyasubjectscientifically,wemusttrytobeobjective.Inordertotestouridea,weshoulddesignexperiments,thenanalyzetheresultsanddrawaconclusion.Nowlet’stalkaboutthethirdquestion.Whatarethemostimportantskillsweneedtoberealscientists?S10:Weshouldbeverycareful.S11:Beobjectiveandlogical.S12:Weshouldbewiseenoughtodesignanexperimentandwritethereportsclearly.S13:Weshouldbeabletodrawconclusionsfromtheexperimentsandnotimposeconclusionsonthedata.T:Ithinkyouhavedonegreatwork.Fromthediscussionweknowthatit’snoteasytobeascientist.Soyoushouldworkharderifyouwanttobeascientist.Step3.Pre-readingGettheSstodiscussthequestionsonPage25withtheirpartners.ThenasktheSstotelltheirstories.EncouragetheSstotelldifferentstories.Iftheydon’tknowany,tellthemsome.T:Nowpleaselookattheslideshow.Anddiscussthesequestionswithyourpartners.ThenI’llasksomestudentstotellustheirstories.Areyouclear?Ss:Yes,Sir/Madam.1.Doyouknoweachreligionorculturehasitsownideasaboutthebeginningoftheuniverse?Pleasegiveanexampleifyouknow.2.Doyouknowwhatascientificideais?AftertheSs’discussion,teachersaysthefollowing. T:Nowwho’dliketotellusastory?Volunteer!S1:Letmetry.InChina,weallknowthatPanguseparatestheskyfromtheearth.T:Canyoudescribethestoryindetails?S1:Sorry,Ican’trememberclearly.T:Whocan?Nobody?NowI’lltellyou.Lookatthescreen.Step4.ReadingScanningGettheSstoreadthepassagequicklyandaccuratelyandmeanwhilehelptheSstoformagoodhabitofreading.TeachergivestheSsacoupleofminutestolookthroughthewholepassage.TelltheSstoreadthetextsilentlyandthenasksomedetailedquestionsaboutthetextontheslideshowwiththeirpartners.TeachershouldencouragetheSstoexpresstheirideas.T:We’regoingtolearnapassageabouthowlifebeganontheearth.Nowlet’slookattheslideshow.Readthetextquicklyandfindanswerstothefollowingquestions.Showthequestionsonthescreen.1.Whatwasthereontheearthbeforelifecouldbegin?2.Whydoscientiststhinktherehasneverbeenlifeonthemoon?3.Whydidanimalsfirstappearintheseas?4.Whydidgreenplantshelplifetodevelop?5.Whyweremammalsdifferentfromotheranimals?T:Nowwhocananswerthefirstone?S1:Watervapour,carbondioxide,oxygen,nitrogenandothergases.T:Whataboutthesecondone?S2:Becausethereisnowateronthemoon.T:Whataboutthethirdone?S3:Becausewaterallowedtheearthtodissolveharmfulgasesintotheoceansandseas.T:Thefourthone? S4:Becausegreenplantscantakecarbondioxidefromtheatmosphereandfilltheairwithoxygen.T:Whataboutthelastone?S5:Theyweredifferentbecausetheyproducedtheiryoungfromwithintheirbodies.T:Welldone!NowturntoPage26Comprehending1,Ithinkyoumaycontinuetoreaditagaintogetmoredetails.SkimmingInthispart,SswillreadthetextagainandthenfinishPart1,2and3.T:NowpleaseskimthepassagefasttofinishPart1.Thenwewillchecktheanswer.KeytoPart1:BCBBT:SkimParagraph2,3and4,andfinishPart2and3.Key:DBIGEHACFJT:ForPart3,discussthemwithyourpartner.T:Whyisitwronginfilmsandstoriestoshowdinosaursandpeopletogether?S:Becausedinosaursdiedoutlongbeforehumanbeingsdevelopedontheearth.T:Doyouagreewithhim?S:Yes.T:Whatabouttheanswertothesecondquestion?S:Theyarethecleverestanimalsbecausetheyhavelargerbrainsthananyothercreaturesontheearthsofar.T:Excellentjob!I’llcheckhowmuchyouhavelearnedaboutthepassage.Step5.ListeningListentothetapeforthestudentstofollowandhavefurtherunderstandingofthepassage.T:Readafterthetape,thenanswermesomequestionswithyourbookclosed.PlaythetapeT:Howdidwatercomeintobeingontheearth? Ifonestudentcan’tanswercompletely,asktwoorthreeormorestudents.Ss:Theexplosionoftheearthproducedwatervapor,whichturnedintowaterwhentheearthcooleddown.T:Whyiswaterimportantontheearth?Ss:Becausewaterallowedtheearthtodissolveharmfulgasesintotheoceansandseas.T:No.3,finishthefollowingform.21smallplantsinwater3greenplantsonland4insects(onland)57896forestsKeytotheexercise:2.shellfishandallsortsoffish5.amphibian(onlandandinwater)7.reptiles(onland)8.dinosaurs(onland)9.mammals(onland)T:That’sallforthispassage.Nowlet’sdealwithsomelanguagepoints.ExplanationT:TurntoPage25.Let’slookatthesentences:1.Itexplodedloudlywithfireandrock,whichwereintimetoproducethewatervapour.whichleadsnon-restrictiveattributiveclause.intime:soonerorlater;eventuallyI’llseehimintime.intime(forsth./todosth.):notlateShewillbebackintimetopreparedinner. in/outoftime:in/notinthecorrecttimeTheaudienceclappedintimetothemusic.2.Nobodyknewthatitwasgoingtobedifferentfromotherplanetsgoingaroundthesun.bedifferentfrom:notlikesomeoneorsomethingelseinoneormorewaysNote:Wecanusevery,much,quite,entirely,totallytomodifydifferentCitylifeisquitedifferentfromcountrylife.goingaroundthesunis-ingformthatservesasattributive.Menbreakingthelawwillbepunished.Canyouseethegirldancingwithyourboyfriend?3.Whetherlifewillcontinueontheearthformillionsofyearstocomewilldependonwhetherthisproblemcanbesolved.tocome:servesasattributiveSheisthelastpersontodosuchathing.dependon:somethingmightonlyhappenorbetrueifthecircumstancesarerightforitOursuccessdependsonwhethereveryoneworkshardornot.4.Walkingdoesneedabitofpracticenowthatgravityhaschanged.nowthat:becauseofthefactthatNowthatI’mfree,Icanenjoymusicforawhile.Nowthatyou’vegrownupyoucandecideityourself.PassageAnalyzingChartofthetextHowlifebeganontheearthwater1smallplantsinwater2shellfishandallsortsoffish3greenplantsonland6forests4insects(onland)5amphibians(onlandandinwater) 7reptiles(onland)8dinosaurs(onland)9mammals(onland)10.smallcleveranimalswithhandsandfeet11.human4insects(onland)5amphibians(onlandandinwater)TextRetellingRetellthetextusingabout100words.Step6.HomeworkRetellthepassageaccordingtotheform.Rememberimportantlanguagepoints.PeriodtwoExtensivereadingStep1ShowsomepicturesoftheastronautsinthespaceStep2ReadthepassageandfillintheformStep3Languagepoints1.LastmonthIwasluckyenoughtohaveachancetomakeatripintospacewithmyfriendLiYanping,anastronomer.Enough:pronadjadvTheboyisoldenoughtodotoschool.Hecouldn’trunquicklyenoughtocatchupwiththecat.2.Thenwewereoff.beoff=setoffIamofftoday.Weareofftoday.3getcloseto靠近，接近，指动态变化becloseto距......近，指状态Theschoolisclosetothepostoffice 4.ButwhenItriedtostepforwardIfoundIwascarriedtwiceasfarasontheearthandfellover.1).“A+be+倍数+as+形容词原级+as+B”.Thistreeisthreetimesastallasthatone.Hisfatheristwiceasoldashe.2).“A+be+倍数+形容词比较级+than+B”TheYangtzeRiverisalmosttwicelongerthanthePearlRiver.Thenumberofstudentsinourschoolisthreetimeslargerthanthatintheirs.3).“A+be+倍数+the+名词(size,length,amount)+of+B”Thenewlybroadenedsquareisfourtimesthesizeofthepreviousone.6.Wewatched,amazedasfirebrokeoutontheoutsideofthespaceshipastheearth’sgravityincreased.breakout1)战争爆发2)发生争吵3)(火灾)发生7.cheerup;cheersb.up感到高兴振奋8.massesof许多，大量9.getthehangof熟悉,掌握,理解10.exhausting(sth);exhausted(sb)Step4HomeworkCollectpassagesaboutgravity.Prepareforspeaking.PeriodthreeLanguageStudyStep1.RevisionTranslatethefollowingsentences1.你迟早会成功的。You’llsucceedintime. 2.我的车与你的不一样。Mycarisdifferentfromyours.3.站在门旁边的那个人是谁？Whoisthepersonstandingbythedoor?4.他总是第一个来，最后一个离开。He’salwaysthefirsttocomeandthelasttoleave.5.既然你已经长大了，你自己决定吧。Nowthatyouhavegrownupyoucandecideityourself.Step2.Checktheexercisesinthispart.Step3.GrammarWhatpartdoestheunderlinedpartserveasineachsentence?Atreehasfallenacrosstheroad.Youareastudent.Tofindyourwaycanbeaproblem.Smokingisbadforyou.“Howdoyoudo?”isagreeting.Whatshesaidisnotyetknown.Thatweshallbelateiscertain.Itiscertainthatweshallbelate.Wecanseefromthesesentencesthatasentenceservesassubject,sowecallitSubjectClause1.NounClausesastheSubjectTotellwhatitisandtheimportancewithsomeexamplesWhattheteachersaidtodaywasquiteright. Thattheyarebadlyinneedofhelpisquiteclear.Whethertheywillsellthehouseisnotyetdecided.Whateverwassaidheremustbekeptsecret.2it作形式主语Itisapitythatshehasmadesuchamistake. 1)Itis+adj./n.+从句　Itisapity/shamethat...遗憾的是……　Itispossiblethat...很可能……　Itisunlikelythat...不可能……2)It+不及物动词+从句　Itseems/appearsthat...似乎……　Ithappenedthat...碰巧……3)It+be+过去分词+从句　　Itissaidthat...据说……　　Itisknowntoallthat...众所周知……　　Itisreportedthat...据报道……　　Itisbelievedthat...据信……;人们相信……　　Itissuggestedthat...有人建议……1.AskthestudentstodosomeexercisesStep4.HomeworkFinishtheexercisesaboutNounClausesastheSubjectPeriodfourListeningStep1.Pre-listeningIntroduceIsaacNewtonandAlbertEinsteinStep2.Listening1.Listentothetapeandfilltheform2.Handoutthelisteningmaterialsandlistentothetapeagain,thenfillthebracketwiththerightanswers.AtlastasksomestudentstoreadthepassageStep3.ListeningonP621.Discussthefollowingquestions1)_.Who’sYangLiwei? He’sourherowhotraveledintospaceonOctober15,2003.2).What’sthenameofthespaceship?ShenzhouV.3).Doyouknowwhateducationandexperienceyouneedtobecomeanastronaut?No.2.Listentothetapeandanswersometrueorfalsequestions1.GivethestudentslisteningmaterialandaskthemtocompletethepassagewhilelisteningStep4.HomeworkAfterclass,youshouldlistentothemagainandsumupwhatyouhavelearntfromthem.Forthehomework,thinkaboutonequestion:Whatneedstobeanastronaut?PeriodfiveSpeakingandWritingStep1.Speaking1.Spacewalkisdifficultanddangerous.Whatshouldanastronauttakewithhim?Oxygencan,spacesuit,gravityboots,watersystem,specialfood,specialropes.2.Haveaninterviewwiththefollowingtwoheroes.1).Howdoyoufeelwhenyouhavejustcomebackfromouterspace?2)Whatisthemostexcitingexperiencewhenyouareinouterspace?3)Whataboutthemostterriblething?4)Whatdifficultieshaveyougonethrough?3Speakoneortwosentencesforeachequipmentyoushouldtake.Step2.TalkingonPage621.Showtheusefulexpressions:Pleaselookat/listento...Pleasecheckthat... Youneed...Pleasepayattentionto...Don’tforgetto...You’dbetter...Makesureyou...Watchoutfor...Youmustn’t...2.GivetheSampledialogueStep3.Discussion1.Ifyouaregoingoffonaholiday,whatwillyoutake?Iwilltakeclothes,shoes,foodandmanyotherthings.2.Butforspacetravel,youneedspecializedequipment.Whatequipmentshouldyoutake?Writedownthedangersandthewaytosolvethem.Step4.WritingTask1.Haveyoueverremembered16thOct,2003?Whathappenedonthatday?2.Howmanypreparationshavetheymadeforthisspacetravel?3.Supposeyouarethescientistwhovisitsthemooninthefuture,pleasetellusyourplan.Forexample,youcanthinkaboutthesequestionsandwritedownyourplan.1).Whatpreparationsshouldyoumake?2).Whatwillyouseeduringyourspacetravel?3).Whatwillyoudoonthemoon?4.showaSamplearticletothestudentsStep4.HomeworkSumupthewholeunit.Collectthematerialsaboutstars,spacetravelanddifferentideasaboutthebeginningoflife.