英语一轮人教版必修3教案：Unit4《Astronomy_thescienceofthestars》period1warmingupandreading

1、Unit4Astronomythescieneeofthestars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.存有；生存systemn.系统；体系；thusadv.所以；于是制度religionn.宗教；宗教信dioxiden.二氧化物仰theoryn.学说；理论biologyn.生物学atomn.原子biologistn.生物学家billionpron.&n.&adj.puzzlen.迷；难题（英）万亿；（美）vt.&vi.（使）

2、十亿迷惑;（使）为难globen.球体；地球仪；gravityn.万有引力；重地球力violentadj.猛烈的；激floatvt.&vi.（使）烈的；强暴的浮动;（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crashvt.&vi.碰撞；础的坠落harmfuladj.有害的spaceshipn.宇宙飞船acidn.酸pulln.&vt.拉；拖;牵引力chainn.链子；连锁；satelliten.卫星；人造卫

3、锁链星multiplyvt.&vi.乘；增massn.质量；团；oxygenn.氧exhaustvt.用尽;耗尽短语solarsystem太阳系blockout挡住（光线）intime即时；终于cheerup感到咼兴；感到振奋layeggs下蛋nowthat既然givebirthto产生；分娩breakout突发；爆发inonesturn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. Whatitwastobecomewasuncertainuntilbetween4.5and3.8billionyearsag

4、owhenthedustsettledintoasolidglobe.(betodo;what-clauseasthesubject)2. Theearthbecamesoviolentthatitwasnotclearwhethertheshapewouldlastornot.(so.that;itis/wasnot+adj.+whether-clause)3. Whatisevenmoreimportantisthatastheearthcooleddown,waterbegantoappearonitssurface.(what-clauseasthesubject;that-claus

5、easthepredicative)4. Itwasnotimmediatelyobviousthatwaterwastobefundamentaltothedevelopmentoflife.itis/was(not)+adj.+that5. Sowhetherlifewillcontinueontheearthformillionsofyearstocomewilldependonwhetherthisproblemcanbesolved.(whether-clauseasthesubject;dependon+whether-clauseastheobject)功能Instruction

6、sPleasepayattentionto.Pleasecheckthat.Youneed.Dontforgetto.Youdbetter.语法NounclausesasthesubjectWhatitwastobecomewasuncertain.itwasnotclearwhetherthesolidshapewastolastornot.教学重点1. Getstudentstolearnaboutthedevelopmentoftheearthandmakingaspacetrip.2. Havestudentslearnsomeusefulnewwordsandexpressionsa

7、ndletthemlearneffectivewaystorememberEnglishvocabulary.3. Enablestudentstousetheexpressionsofinstructionscorrectlyindailylife.4. Letstudentslearnthenewgrammaritem:nounclausesasthesubject.5.Developstudentslistening,speaking,readingandwritingabilities.教学难点1. Enablestudentstomastertheuseofnounclausesas

8、thesubject.2. Letstudentslearntowriteashortarticletoshowtheirproblemsandthewaystoovercomethem.3.Developstudentsintegrativeskills.课时安排Periodsneeded:7Period1WarmingupandreadingPeriod2LearningaboutIanguage:ImportantIanguagepointsPeriod3LearningaboutIanguage:GrammarPeriod4UsingIanguage:Listeningandspeak

9、ingPeriod5UsingIanguage:ExtensivereadingPeriod6UsingIanguage:SpeakingandwritingPeriod7Revision:SummingupandlearningtipPeriod1Warmingupandreading整体设计教材分析Thisisthefirstteachingperiodofthisunit.Atthebeginningoftheclass,theteachercanleadinthetopicoftheunitbyhavingafreetalkwithstudentsaboutsomefamousscie

10、ntistsandwhattheyhavediscovered.ThenturntoWarmingUp.Itisintendedtohavestudentsthinkaboutandthendiscussthesetwogroupsofquestions:1. Inoursolarsystemeightplanetscirclearoundthesun.Whatarethey?Canyoumatchthenameswiththeplanets?2. Whatinterestsyouinastronomy?Doyouknowanyquestionsthatastronomersareintere

11、stedin?Pre-readingistoremindstudentsthattheoriginoflifeontheearthisaquestionthatinterestsastronomersandeachreligionandculturehasitsownideasabouthowlifebeganontheearth.TheteachershouldaskstudentswhattheyknowabouttheseandthenletthempredictwhatkindofinformationwillbeintroducedinthenextpartReading.There

12、adingpassagetitledHOWLIFEBEGANONTHEEARTHprovidesstudentsabriefintroductiononhowtheuniversedevelopedandhowlifebeganontheearth.Itprovidesascientificbackgroundtoanyinvestigationintospaceanditisfactual.Studentsareencouragedtopreviewthetextandfindouttheusefulnewwords,expressionsandstructuresthemselves.Th

13、eyshouldtrytoworkoutthemeaningsofthenewwordsthroughthecontext.Thenifnecessary,theycanlookthemupinthedictionaryorturntotheteacherforhelp.Alsoencouragethemtolookatthepicturesandreadthetitletoguesswhatthetextmightbeabout.Thenletthemskimforthegeneralidea,andscanforfurtherunderstanding.Inordernottoletthe

14、mfeelmuchdifficult,theteachershoulddealwithanylanguageproblemswhiletheyarereading.Afterreading,studentsarerequiredtodothefiveexercisesintheComprehendingtoseehowmuchtheyhaveunderstoodthereadingpassage.Theteachercanfirstletthemworkinpairsoringroupstofindtheanswerscooperatively,andthenchecktheiranswers

15、withthewholeclass.Toconsolidatethecontentsofthereadingpassage,studentsshouldberequiredtoretellthepassage.Inordertoarousethestudentsinterest,theteachercanholdacompetition.教学重点1. Letstudentsreadthepassageandlearnaboutthedevelopmentoftheearth.2. Getstudentstolearndifferentreadingskills,especiallytherea

16、dingabilityofunderstandingimpliedmeaningoftheauthor.教学难点1.Enablestudentstounderstandthepassageandknowaboutthedevelopmentoftheearth.2.Letstudentslearnhowtousedifferentreadingskillsfordifferentreadingpurposes.三维目标知识目标1. Getstudentstolearntheusefulnewwordsandexpressionsinthispart：astronomy,system,relig

17、ion,theory,atom,billion,globe,violent,carbon,atmosphere,unlike,fundamental,harmful,acid,chain,multiply,oxygen,exist,thus,dioxide,puzzle,solarsystem,intime,layeggs,givebirthto,inonesturn,carbondioxide,prevent.from2. Letstudentslearnaboutthedevelopmentoftheearth.水平目标1. Developstudentsreadingabilityand

18、letthemlearndifferentreadingskills.2. Enablestudentstoknowaboutthedevelopmentoftheearth.情感目标1. Trainstudentsinterestinscienceandstimulatetheirloveforastronomy.2. Developstudentssenseofcooperativelearning.教学过程设计方案（一）tStep1PresentationHaveafreetalkwithstudents.1. Letstudentsbrainstormthefollowingquest

19、ions：Whoareourancestors?Doyouknowwhatitwaslikebeforelifeappearedontheearth?Doyouknowhowlifebeganontheearth?Doyouwanttogetmoreinformation?2. Tellstudents：Todaywewilllearnsomethingabouthowlifebeganontheearth.TurntoPage25.LetscometoWarmingUpfirst.tStep2WarmingupLetstudentsthinkaboutthefollowingquestion

20、sandthendiscussthemwiththeirpartners.1. Inoursolarsystemeightplanetscirclearoundthesun.Whatarethey?Canyoumatchthenameswiththeplanets?VenusEarthMarsMercuryJupiterNeptuneSaturn2. Whatinterestsyouinastronomy?Doyouknowanyquestionsthatastronomersareinterestedin?tStep3Pre-reading1. Getstudentstodiscussthe

21、questionswiththeirpartners.1) Theoriginoflifeonearthisaquestionthatinterestsastronomers.Whatdoyouknowaboutit?2) Eachreligionandculturehasitsownideasabouthowlifebeganonearth.Whatdoyouknowaboutthem?2. Letthemtelltheirstories.Encouragethemtotelldifferentstories.Iftheydontknowany,tellthemsome,forexample

22、,Panguseparatedtheskyfromtheearth,Panguturnedintoamyriadofthings,Nuwamademen,andsoon.3. Askthemtoreadthetitleandlookatthepictures.Predictwhatthereadingwillbeabout.tStep4Reading1. FastreadingGetstudentstoreadthepassagequicklyandthenwritedownthemainideaforeachparagraphandthewholepassageinthefollowingc

23、hart.HOWLIFEBEGANONTHEEARTHParagraph1Paragraph2Paragraph3Paragraph4Paragraph5ThepassageLetstudentslookthroughthechartandthenreadthetextsilently.Threeminuteslater,checktheanswerswiththewholeclass.2. IntensivereadingAllowstudentstoreadthepassagecarefullythistimetogettheimportantdetails,andthenfinishth

24、efollowing1) Puttheorderofdevelopmentoflifeintoatimeline.(1) Insectsandamphibiansappeared.(2) Dinosaursappeared.(3) Theearthbecameasolidball.(4) Smallplantsgrowonthewater.(5) Reptilesappeared.(6) Plantsbegintogrowondryland.(7) Theearthwasacloudofdust.(8) Waterappearedontheearth.(9) Shellfishandother

25、fishappeared.(10) Theuniversebeganwitha“BigBang.(11) Cleveranimalswithhandsandfeetappeared.(12) Mammalsappeared.2) Choosethebestanswertoeachquestionaccordingtothetext.(1) Whatisimportantforthebeginningoflife?A. Thewaterontheearth.B. Theearthsatmosphere.C. Theformofforests.D. Dissolvingharmfulgases.(

26、2) Whichofthefollowingappearedontheearthfirst?A. Insects.B. Reptiles.C. Amphibians.D. Shellfishandfish.(3) Whichofthefollowingstatementsistrue?A. WaterstillexistsonMars.B. Theearthsatmosphereismadeupofoxygenandnitrogen.C. Theearthhaddissolvedtheharmfulatmosphereintotheoceansandseas.D. Plantsprovideo

27、xygentotheearth.(4) Whatisthepassagemainlyabout?A. Theappearanceanddevelopmentoflifeontheearth.B. Thebirthoftheearth.C. Whydinosaursdiedout.D. Thefactthathumanbeingscausedglobalwarming.Suggestedanswers：(1)A(2)D(3)D(4)A3. ReadinganddiscussionReadthetextathirdtimeandthenworkinpairstodiscussthefollowin

28、gquestions.1) Whywastheearthdifferentfromtheotherplanets?2) Whydidtheplantsgrowbeforetheanimalscame?3) Whyisitwrongtoshowfilmswithdinosaursandpeopletogether?4) Thereusedtobenineplanetsinthesolarsystem.Recentlyscientistshavedecidedthatoneofthemcannolongerbeconsideredaplanet.Doyouknowthenameofthatplan

29、et?Doyouknowwhytheyremovedit?5) Whatproblemiscausedbyhumanbeings?(Letstudentshaveenoughtimetoreadthepassagecarefullyanddiscussthequestionswiththeirpartners.Encouragethemtoexpresstheirownideas.)4. ExplanationHelpstudentsanalyzesomedifficult,longandcomplexsentencesandguessthemeaningofsomenewwords.Enco

30、uragethemtotrytodealwiththelanguagepointsinthecontext.Discussthefollowingimportantsentencesandphrasesinthepassage.1) Whatitwastobecomewasuncertainuntilbetween4.5and3.8billionyearsagowhenthedustsettledintoasolidglobe.2) Theearthbecamesoviolentthatitwasnotclearwhethertheshapewouldlastornot.3) Theywere

31、intimetoproducecarbon,nitrogen,watervaporandothergases,whichweretomaketheearthsatmosphere.4) Sowhetherlifewillcontinueontheearthformillionsofyearstocomewilldependonwhetherthisproblemcanbesolved.Suggestedexplanations：1)Whatleadsanounclauseasthesubjectandwhenleadsanattributiveclause.2)Here“whetherthes

32、hapewouldlastornot”isanounclauseasthesubject.3) Here“whichweretomaketheearthsatmosphere”ime：1)soonerorlater;eventually2)intime(forsth./todosth.)：notlateIwillseehimintime.Shewillbebackintimetopreparedinner.4) Inthissentence,therearetwoclausesledbywhether.Thefirs

33、toneisanounclauseasthesubjectandthesecondastheobject.tocome：servesasattributiveSheisthelastpersontodosuchathing.dependon：somethingmightonlyhappenorbetrueifthecircumstancesarerightforitOursuccessdependsonwhethereveryoneworkshardornot.5. ReadingaloudandunderliningAskstudentstoreadthepassagealoudtothet

34、apeandletthempayattentiontothepronunciationofeachnewwordandthepauseswithineachsentence.Tellthemtopickoutalltheusefulexpressionsorcollocationsfromthepassagewhilereadingandcopythemtothenotebooksafterclassashomework.Collocations：ontheearth,accordingto,acloudofdust,so.that,whether.ornot,intime,watervapo

35、r,cooldown,ononessurface,allow.todo.,achainreaction,millionsof,onthesurfaceof,beableto,aswellas,bydoing.layeggs,bedifferentfrom,givebirthto,spreadallovertheearth,inonesturn,prevent.from,asaresultof,too.to.,dependontStep5DiscussionAfterreadingthepassage,letstudentsdiscussthefollowingquestions.1. Whyd

36、oyouthinkthathumansarethecleverestanimalsontheearth?2. Doyoubelievethatthereislifeonotherplanets?Whyorwhynot?3. Doyouthinkitispossiblethatonedaypeoplewillmovetheirhousestootherplanets?tStep6ConsolidationAskstudentstoretellthepassagewiththehelpofthefollowing.acloudofdusttasolidballtpresenceofwatertsm

37、allplantsgrowonthewatertshellfishandotherfishappeartplantsbegintogrowondrylandtinsectsandamphibiansappeartretilesappeartdinosaursappeartmammalsappeartStep7Homework1. Learntheusefulnewwordsandexpressionsinthispartbyheart.2. Readthereadingpassageagainandtrytotalkabouthowlifebeganontheearthinyourownwor

38、ds.设计方案（二）tStep1LeadinginthetopicShowstudentsapictureaboutsolarsystem.Letthemmatchthenameswiththeplanets.tStep2WarmingupEachreligionandculturehasitsownideasabouttheoriginoflifeontheearth.Letstudentstelldifferentstoriesthattheyknow.tStep3Predictingbylookinganddiscussing1. Lookatthepicturesandtitleoft

39、hereadingpassageanddiscussinpairswhatthepassagemightbeabout.2. Twoorthreestudentswillgivetheiropinions.3. Letthemreadthepassagequicklytoseeiftheyareright.tStep4Reading1. Givestudents3minutes,andaskthemtoskimthepassagetogetthegeneralideaforeachparagraphandthepassage.2. Givestudents5minutestoreadthepassagecarefully,andthenanswerthefollowingquestions.1) Whatwasthereontheearthbeforelifebegan?2) Whydoscientiststhinktherehasneverbeenlifeonthemoon?3) Whydidanimalsfirstappearinthesea?4) Whydogreenplantshelplifetodevelop?5) Whyweremammalsdifferentfromotheranimals?3. Givestud