高中英语优秀教案：Unit 4 Astronomy the science of the stars Period 1　Warming up and reading（新人教版必修3）

学必求其心得，业必贵于专精学必求其心得，业必贵于专精学必求其心得，业必贵于专精Unit4Astronomy：thescienceofthestars单元要览类别课程标准要求掌握的项目话题Scienceofthestars;thedevelopmentoflife；spacetravelandgravity词汇astronomyn。天文学existvi.存在；生存systemn。系统；体系;制度thusadv.因此;于是religionn.宗教；宗教信仰dioxiden.二氧化物theoryn。学说；理论biologyn。生物学atomn.原子biologistn。生物学家billionpron.＆n.＆adj.(英）万亿;(美)十亿puzzlen.迷;难题vt.＆vi。（使)迷惑；(使)为难globen。球体；地球仪;地球gravityn.万有引力；重力violentadj。猛烈的；激烈的；强暴的floatvt.＆vi.（使）浮动;（使）漂浮n.漂浮物carbonn。碳gentleadj。温和的；文雅的atmospheren。大气层;气氛physicistn。物理学家unlikeprep.不同；不像climaten.气候fundamentaladj.基本的;基础的crashvt.＆vi.碰撞;坠落harmfuladj.有害的spaceshipn。宇宙飞船acidn.酸pulln.＆vt.拉；拖;牵引力chainn。链子;连锁；锁链satelliten.卫星；人造卫星multiplyvt。＆vi.乘;增加massn。质量;团；块；大量oxygenn.氧exhaustvt.用尽;耗尽短语solarsystem太阳系blockout挡住（光线）intime及时;终于cheerup感到高兴;感到振奋layeggs下蛋nowthat既然givebirthto产生;分娩breakout突发;爆发inone'sturn轮到某人;接着watchout密切注视；当心;提防carbondioxide二氧化碳prevent。。.from阻止;制止重要句型1.Whatitwastobecomewasuncertainuntilbetween4。5and3。8billionyearsagowhenthedustsettledintoasolidglobe.(betodo;what—clauseasthesubject）2。Theearthbecamesoviolentthatitwasnotclearwhethertheshapewouldlastornot.（so。..that；itis/wasnot+adj。+whether-clause)3.Whatisevenmoreimportantisthatastheearthcooleddown，waterbegantoappearonitssurface.（what—clauseasthesubject;that-clauseasthepredicative)4.Itwasnotimmediatelyobviousthatwaterwastobefundamentaltothedevelopmentoflife。\[itis/was(not)+adj.+that\］5。Sowhetherlifewillcontinueontheearthformillionsofyearstocomewilldependonwhetherthisproblemcanbesolved。(whether-clauseasthesubject；dependon+whether—clauseastheobject）功能Instructions：Pleasepayattentionto...Pleasecheckthat..。.Youneed。..Don’tforgetto.。. Makesurethat。。.. Watchoutfor。.。You'dbetter。。。 Youmust/mustn’t... Pleaselookat..。语法NounclausesasthesubjectWhatitwastobecomewasuncertain.。.。..itwasnotclearwhetherthesolidshapewastolastornot.教学重点1.Getstudentstolearnaboutthedevelopmentoftheearthandmakingaspacetrip.2.HavestudentslearnsomeusefulnewwordsandexpressionsandletthemlearneffectivewaystorememberEnglishvocabulary。3。Enablestudentstousetheexpressionsofinstructionscorrectlyindailylife。4.Letstudentslearnthenewgrammaritem：nounclausesasthesubject。5.Developstudents’listening，speaking,readingandwritingabilities。教学难点1。Enablestudentstomastertheuseofnounclausesasthesubject.2.Letstudentslearntowriteashortarticletoshowtheirproblemsandthewaystoovercomethem。3。Developstudents’integrativeskills.课时安排Periodsneeded:7Period1WarmingupandreadingPeriod2Learningaboutlanguage:ImportantlanguagepointsPeriod3Learningaboutlanguage：GrammarPeriod4Usinglanguage:ListeningandspeakingPeriod5Usinglanguage：ExtensivereadingPeriod6Usinglanguage:SpeakingandwritingPeriod7Revision：SummingupandlearningtipPeriod1Warmingupandreading整体设计教材分析Thisisthefirstteachingperiodofthisunit。Atthebeginningoftheclass,theteachercanleadinthetopicoftheunitbyhavingafreetalkwithstudentsaboutsomefamousscientistsandwhattheyhavediscovered。ThenturntoWarmingUp.Itisintendedtohavestudentsthinkaboutandthendiscussthesetwogroupsofquestions：1。Inoursolarsystemeightplanetscirclearoundthesun.Whatarethey?Canyoumatchthenameswiththeplanets?2。Whatinterestsyouinastronomy?Doyouknowanyquestionsthatastronomersareinterestedin?Pre—readingistoremindstudentsthattheoriginoflifeontheearthisaquestionthatinterestsastronomersandeachreligionandculturehasitsownideasabouthowlifebeganontheearth.TheteachershouldaskstudentswhattheyknowabouttheseandthenletthempredictwhatkindofinformationwillbeintroducedinthenextpartReading。ThereadingpassagetitledHOWLIFEBEGANONTHEEARTHprovidesstudentsabriefintroductiononhowtheuniversedevelopedandhowlifebeganontheearth。Itprovidesascientificbackgroundtoanyinvestigationintospaceanditisfactual.Studentsareencouragedtopreviewthetextandfindouttheusefulnewwords,expressionsandstructuresthemselves.Theyshouldtrytoworkoutthemeaningsofthenewwordsthroughthecontext.Thenifnecessary，theycanlookthemupinthedictionaryorturntotheteacherforhelp.Alsoencouragethemtolookatthepicturesandreadthetitletoguesswhatthetextmightbeabout.Thenletthemskimforthegeneralidea,andscanforfurtherunderstanding。Inordernottoletthemfeelmuchdifficult，theteachershoulddealwithanylanguageproblemswhiletheyarereading。Afterreading,studentsarerequiredtodothefiveexercisesintheComprehendingtoseehowmuchtheyhaveunderstoodthereadingpassage.Theteachercanfirstletthemworkinpairsoringroupstofindtheanswerscooperatively,andthenchecktheiranswerswiththewholeclass.Toconsolidatethecontentsofthereadingpassage，studentsshouldberequiredtoretellthepassage。Inordertoarousethestudents’interest，theteachercanholdacompetition.教学重点1.Letstudentsreadthepassageandlearnaboutthedevelopmentoftheearth。2。Getstudentstolearndifferentreadingskills，especiallythereadingabilityofunderstandingimpliedmeaningoftheauthor。教学难点1。Enablestudentstounderstandthepassageandknowaboutthedevelopmentoftheearth。2。Letstudentslearnhowtousedifferentreadingskillsfordifferentreadingpurposes.三维目标知识目标1。Getstudentstolearntheusefulnewwordsandexpressionsinthispart:astronomy,system,religion，theory,atom,billion，globe，violent，carbon,atmosphere，unlike，fundamental，harmful，acid，chain,multiply，oxygen，exist，thus,dioxide，puzzle,solarsystem，intime，layeggs，givebirthto,inone’sturn，carbondioxide,prevent.。。from2。Letstudentslearnaboutthedevelopmentoftheearth。能力目标1.Developstudents'readingabilityandletthemlearndifferentreadingskills。2。Enablestudentstoknowaboutthedevelopmentoftheearth.情感目标1。Trainstudents’interestinscienceandstimulatetheirloveforastronomy。2.Developstudents’senseofcooperativelearning。教学过程设计方案（一）→Step1PresentationHaveafreetalkwithstudents.1。Letstudentsbrainstormthefollowingquestions:Whoareourancestors？Doyouknowwhatitwaslikebeforelifeappearedontheearth?Doyouknowhowlifebeganontheearth？Doyouwanttogetmoreinformation？2.Tellstudents:Todaywewilllearnsomethingabouthowlifebeganontheearth。TurntoPage25.Let'scometoWarmingUpfirst。→Step2WarmingupLetstudentsthinkaboutthefollowingquestionsandthendiscussthemwiththeirpartners.1。Inoursolarsystemeightplanetscirclearoundthesun.Whatarethey？Canyoumatchthenameswiththeplanets？VenusEarthMarsMercuryJupiterNeptuneSaturn2。Whatinterestsyouinastronomy？Doyouknowanyquestionsthatastronomersareinterestedin？→Step3Pre—reading1。Getstudentstodiscussthequestionswiththeirpartners。1)Theoriginoflifeonearthisaquestionthatinterestsastronomers.Whatdoyouknowaboutit？2)Eachreligionandculturehasitsownideasabouthowlifebeganonearth.Whatdoyouknowaboutthem？2。Letthemtelltheirstories.Encouragethemtotelldifferentstories。Iftheydon'tknowany,tellthemsome，forexample,Panguseparatedtheskyfromtheearth，Panguturnedintoamyriadofthings,Nuwamademen，andsoon。3。Askthemtoreadthetitleandlookatthepictures.Predictwhatthereadingwillbeabout.→Step4Reading1.FastreadingGetstudentstoreadthepassagequicklyandthenwritedownthemainideaforeachparagraphandthewholepassageinthefollowingchart.HOWLIFEBEGANONTHEEARTHParagraph1Paragraph2Paragraph3Paragraph4Paragraph5ThepassageLetstudentslookthroughthechartandthenreadthetextsilently.Threeminuteslater，checktheanswerswiththewholeclass。2.IntensivereadingAllowstudentstoreadthepassagecarefullythistimetogettheimportantdetails,andthenfinishthefollowing:1)Puttheorderofdevelopmentoflifeintoatimeline.（1）Insectsandamphibiansappeared.（2)Dinosaursappeared.（3)Theearthbecameasolidball。(4）Smallplantsgrowonthewater。(5）Reptilesappeared。（6）Plantsbegintogrowondryland.(7）Theearthwasacloudofdust。(8）Waterappearedontheearth.（9)Shellfishandotherfishappeared。（10)Theuniversebeganwitha“BigBang".(11）Cleveranimalswithhandsandfeetappeared.(12）Mammalsappeared。2）Choosethebestanswertoeachquestionaccordingtothetext。(1）Whatisimportantforthebeginningoflife？A.Thewaterontheearth。B.Theearth’satmosphere.C.Theformofforests。D.Dissolvingharmfulgases.(2）Whichofthefollowingappearedontheearthfirst？A.Insects。B.Reptiles。C.Amphibians.D。Shellfishandfish.（3）Whichofthefollowingstatementsistrue?A.WaterstillexistsonMars.B.Theearth’satmosphereismadeupofoxygenandnitrogen.C.Theearthhaddissolvedtheharmfulatmosphereintotheoceansandseas.D。Plantsprovideoxygentotheearth。(4)Whatisthepassagemainlyabout？A.Theappearanceanddevelopmentoflifeontheearth。B。Thebirthoftheearth.C。Whydinosaursdiedout.D。Thefactthathumanbeingscausedglobalwarming。Suggestedanswers:(1)A（2)D（3)D(4）A3。ReadinganddiscussionReadthetextathirdtimeandthenworkinpairstodiscussthefollowingquestions。1）Whywastheearthdifferentfromtheotherplanets？2）Whydidtheplantsgrowbeforetheanimalscame？3)Whyisitwrongtoshowfilmswithdinosaursandpeopletogether？4)Thereusedtobenineplanetsinthesolarsystem。Recentlyscientistshavedecidedthatoneofthemcannolongerbeconsideredaplanet。Doyouknowthenameofthatplanet？Doyouknowwhytheyremovedit?5）Whatproblemiscausedbyhumanbeings？(Letstudentshaveenoughtimetoreadthepassagecarefullyanddiscussthequestionswiththeirpartners。Encouragethemtoexpresstheirownideas。）4。ExplanationHelpstudentsanalyzesomedifficult,longandcomplexsentencesandguessthemeaningofsomenewwords.Encouragethemtotrytodealwiththelanguagepointsinthecontext.Discussthefollowingimportantsentencesandphrasesinthepassage。1)Whatitwastobecomewasuncertainuntilbetween4。5and3。8billionyearsagowhenthedustsettledintoasolidglobe.2)Theearthbecamesoviolentthatitwasnotclearwhethertheshapewouldlastornot.3)Theywereintimetoproducecarbon，nitrogen，watervaporandothergases，whichweretomaketheearth’satmosphere。4)Sowhetherlifewillcontinueontheearthformillionsofyearstocomewilldependonwhetherthisproblemcanbesolved.Suggestedexplanations:1）Whatleadsanounclauseasthesubjectandwhenleadsanattributiveclause。2）Here“whethertheshapewouldlastornot"isanounclauseasthesubject。3）Here“whichweretomaketheearth’satmosphere”isanon-restrictiveattributiveclause。intime:1）soonerorlater;eventually2)intime(forsth。/todosth.）：notlateIwillseehimintime。Shewillbebackintimetopreparedinner。4)Inthissentence，therearetwoclausesledbywhether.Thefirstoneisanounclauseasthesubjectandthesecondastheobject.tocome：servesasattributiveSheisthelastpersontodosuchathing。dependon：somethingmightonlyhappenorbetrueifthecircumstancesarerightforitOursuccessdependsonwhethereveryoneworkshardornot。5。ReadingaloudandunderliningAskstudentstoreadthepassagealoudtothetapeandletthempayattentiontothepronunciationofeachnewwordandthepauseswithineachsentence。Tellthemtopickoutalltheusefulexpressionsorcollocationsfromthepassagewhilereadingandcopythemtothenotebooksafterclassashomework.Collocations：ontheearth，accordingto，acloudofdust,so。.。that,whether...ornot,intime，watervapor，cooldown,onone’ssurface，allow.。.todo。。。,achainreaction，millionsof,onthesurfaceof,beableto，aswellas，bydoing.。.。,layeggs，bedifferentfrom，givebirthto,spreadallovertheearth，inone'sturn，prevent。..from，asaresultof，too。。.to。.。，dependon→Step5DiscussionAfterreadingthepassage,letstudentsdiscussthefollowingquestions.1。Whydoyouthinkthathumansarethecleverestanimalsontheearth?2。Doyoubelievethatthereislifeonotherplanets?Whyorwhynot?3。Doyouthinkitispossiblethatonedaypeoplewillmovetheirhousestootherplanets？→Step6ConsolidationAskstudentstoretellthepassagewiththehelpofthefollowing.acloudofdust→asolidball→presenceofwater→smallplantsgrowonthewater→shellfishandotherfishappear→plantsbegintogrowondryland→insectsandamphibiansappear→retilesappear→dinosaursappear→mammalsappear→Step7Homework1.Learntheusefulnewwordsandexpressionsinthispartbyheart。2。Readthereadingpassageagainandtrytotalkabouthowlifebeganontheearthinyourownwords。设计方案(二）→Step1LeadinginthetopicShowstudentsapictureaboutsolarsystem.Letthemmatchthenameswiththeplanets.→Step2WarmingupEachreligionandculturehasitsownideasabouttheoriginoflifeontheearth.Letstudentstelldifferentstoriesthattheyknow.→Step3Predictingbylookinganddiscussing1。Lookatthepicturesandtitleofthereadingpassageanddiscussinpairswhatthepassagemightbeabout.2.Twoorthreestudentswillgivetheiropinions.3.Letthemreadthepassagequicklytoseeiftheyareright.→Step4Reading1。Givestudents3minutes，andaskthemtoskimthepassagetogetthegeneralideaforeachparagraphandthepassage。2。Givestudents5minutestoreadthepassagecarefully，andthenanswerthefollowingquestions.1)Whatwasthereontheearthbeforelifebegan？2）Whydoscientiststhinktherehasneverbeenlifeonthemoon?3)Whydidanimalsfirstappearinthesea?4)Whydogreenplantshelplifetodevelop?5）Whyweremammalsdifferentfromotheranimals?3。Givestudents