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1Book3Unit4Astronomy:thescienceofthestars导学案Warmingup-Reading第一课时学习目标：1.了解宇宙科学、地球生命的起源，了解万有引力、黑洞和太空旅行等天文学知识，培养学生对科学的兴趣，激发学生探求科学的热情。2.了解作者的写作特点，培养学生的创造性思维，为学生开拓广阔的想象空间。3.掌握本单元的词汇和习惯用法。4.学会在日常生活中正确运用指示语。5.掌握名词性从句中主语从句的用法。语篇解读：I.FirstreadingReadthepassagecarefullyandanalyzeitsstructure(结构).Writedownthemainideaforeachparagraph.MainideaParagraph1:_______________________theoryabouttheformation（形成）______________Paragraph2:_________________________oftheearthParagraph3:Theimportanceof_________________________________Paragraph4:Thedevelopmentof________________________________Paragraph5:Thearrivalof__________and________________________II.SecondreadingReadthepassagecarefullyandthenchoosethecorrectanswer.1.Whatmadeitpossibleforlifetobeginanddevelopontheearthaccordingtothepassage?A.HarmfulgasesB.WaterC.CarbondioxideD.Oxygen2.Whichisthecorrectorderofthefollowinganimals'appearanceontheearth?a.fishesb.mammalsc.reptilesd.insectse.dinosaursA.a-d-c-e-bB.a-d-b-c-eC.d-a-c-e-bD.c-d-a-e-b3.WhichofthefollowingisNOTtrueaboutthedinosaurs?A.Theyproducedtheiryoungbylayingeggs.B.Someofthemwereveryhuge.C.Theyproducedtheiryoungwithintheirbodies.D.Theyoncelivedontheearthformillionsofyears.4.Whatisthemainproblemtobesolvedforlifetocontinueontheearth?A.FoodB.WaterC.AidsD.GlobalwarmingIII.ThirdreadingPuttherightorderofdevelopmentoflifeintoatimeline.Usethereadingpassagetohelpyou.()1Insectsandamphibiansappeared.()2Dinosaursappeared.()3Theearthbecameasolidball.()4Smallplantsgrewonthewater.()5Reptilesappeared.()6Plantsbegantogrowondryland.()7Theearthwasacloudofdust.()8Waterappearedontheearth.()9Shellfishandotherfishappeared.()10Theuniversebeganwitha“BigBang”.()11Cleveranimalswithhandsandfeetappeared.()12Mammalsappeared.IV.AnalyzethesesentencesandtranslatethemintoChinese.21.①Theearthbecamesoviolentthatitwasnotclearwhethertheshapewouldlastornot.在此句中it作__________,whether引导_____________.so...that在句中引导____________________________.②Itwasnotimmediatelyobviousthatwaterwastobefundamentaltothedevelopmentoflife.在此句中it作__________,that引导______________.befundamentalto...是……的基础2.①.Whatitwastobecomewasuncertainuntilbetween4.5and3.8billionyearsagowhenthedustsettledintoasolidglobewhat在句中引导_____________________.when在句中引导_______________,在句中修饰_______________.settleinto/to…①安顿下来；②习惯于（新居）；③适应（新工作）②.Whatisevenmoreimportantisthatastheearthcooleddown,waterbegantoappearonitssurface.what在句中引导_____________________.that在句中引导_____________________.cooldown①变冷;冷却下来②镇静下来③.Whytheysuddenlydisappearedstillremainsamystery.why在句中引导_____________________.remain________________④.Sowhetherlifewillcontinueontheearthformillionsofyearstocomewilldependonwhetherthisproblemcanbesolved.第一个whether在句中引导________________.第二个whether在句中引导_______________.tocome在句中作____________,表示_________________.3.①However,accordingtoawidelyacceptedtheory,theuniversebeganwitha“BigBang”thatthrewmatterinalldirections.that在句中引导_______________,用来修饰____________.inalldirections=ineverydirection向四面八方②Thisproducedachainreaction,whichmadeitpossibleforlifetodevelop.which在句中引导_______________,用来修饰_____________________.it在句中作_______________,todevelop在句中作______________.3Book3Unit4Astronomy:thescienceofthestars导学案Warmingup-Reading第二课时学习目标：1.了解宇宙科学、地球生命的起源，了解万有引力、黑洞和太空旅行等天文学知识，培养学生对科学的兴趣，激发学生探求科学的热情。2.了解作者的写作特点，培养学生的创造性思维，为学生开拓广阔的想象空间。3.掌握本单元的词汇和习惯用法。4.学会在日常生活中正确运用指示语。5.掌握名词性从句中主语从句的用法。知识导航：1.课本原句：However,accordingto___________________________________(一种普遍为人们所接受的理论),theuniverse_______________(起源)a“BigBang”thatthrewmatter_____________________(四面八方)。①begin/startwith以……开始在句子中作谓语。反义词组：endupwith...以……结束e.g.Thespeechendedupwithafamouspoem.②tobegin/startwith首先；第一这两个词组可以单独使用，在句中做时间状语。Tobegin/startwith,Icouldn’tunderstandeveryword.起初，我一句也没弄明白。2.课本原句:Theywere____________________________(最终产生)carbon,nitrogen,watervapourandothergases,____________________________theearth'satmosphere.(从而形成了地球的大气层)intime及时；终于联系有关time的短语①_____________立刻，马上②aheadoftime提前③forthetimebeing暂时；眼下④在任何时候都不，绝不________________/bynomeans/innoway(放在句首，引起部分倒装)⑤takeone’stime从容不迫；慢慢来（强调时间上不紧，不用紧张）区别：takeiteasy轻松；不紧张；从容（强调精神上不紧张，从容）atmospheren.大气层；气氛在友好的气氛中__________________________“be+不定式”结构在此处表示注定会发生的事。例如：Hewastoregretthatdecisionfortherestofhislife.(=Hedidregretit.)另外，“be+不定式”结构还可以表示：①必须或应该做某事②按计划或安排做某事③用于条件句中，表示“想要”①Hereisamessageforyoufromyourheadteacher:youaretogotoherofficeafterclass.②TheyaretobemarriedinJune.③Insuchdryweather,theflowerswillhavetobewaterediftheyaretosurvive.3.课本原句:Theyproducedyoung__________________________________.（它们一般是通过孵蛋而繁衍后代的。）lie,lie,lay在很多时候容易混淆，它们的区别如下：动词原形第三人称单数过去式过去分词现在分词中文释义lie撒谎；谎话lielay44.课本原句:Theylaideggstooand_______________________________(在地球上生存)formorethan140millionyears.existvi.存在；生存n.existence存在comeintoexistence产生；成立句型“Thereexist+主语+地点状语”表示某处有某物。可用的动词还有lie,stand,live,follow,remain.例如：There_______________________infrontofourteachingbuilding.在我们教学楼前有一棵高树。5.课本原句:____________________________stillremainsamystery.它们为什么会突然灭绝至今还是个谜。remain①link.V.（继续）保存，仍然，仍然处于（某种状态）结构：remain+adj./n./v-ing/-ed如：依然沉默/站着/坐着_______________________________________②vi.