2013人教版必修三unit 4《astronomy the science of the stars》word学案

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1、Book3Unit4　Astronomy：thescienceofthestars　Ⅰ.关键词汇1．Thehenwasoldanditstopped____________(下蛋)eggs.2.Theidea____________(存在)onlyinthemindsofusyoungpeople.3．Doyouthinkoureducation____________(制度)needsimproving?4．The____________(气候)ofsouthernFloridaattractsthousandso

2、ftouristseachwinter.5．Withoutpracticetherewouldbeno____________(理论)．6．ProfessorLihassolvedthe____________(难题)andeveryoneischeering.7．Mars’__________(万有引力)isonlyabout38%ofEarth’s.8．Raisingyourchildtotellthedifferencebetweenrightandwrongisoneofthef____________tas

3、ksofparenthood.9．用harm的适当形式填空(1)Airpollutionwillgetworseandthiswillbe____topeople，forexample，itcancausecancer.(2)Rubbishcanbechangedinto____________things.(3)Don’t____________youreyesbyreadinginthedimlight.10.Lastnightwehadadiscussion，whichbecamemoreandmore____

4、________.Finallywereachedanagreementthatwewillneveruse____________whateverhappens.(violent)关键短语1．________________下蛋2．________________　　及时，终于3．________________产生；分娩4．________________轮到某人；接着5．________________阻止；制止6．________________挡住(光线)7．________________感到高兴；感到振

5、奋8．________________既然9．________________突发；爆发10．________________密切注视；当心；提防重点句式1．________________wasuncertainuntilbetween4.5and3.8billionyearsagowhenthedustsettledintoasolidglobe.随后它会变成什么没有人知道，直到38～45亿年前，这团尘埃才慢慢地形成一个固体的球状物。2．Theearthbecame____________itwasnotclea

6、rwhethertheshapewouldlastornot.地球变得如此猛烈，以至于它的形状能否持久还不清楚。3．Thisproducedachainreaction，which__________________.这就产生了一系列的反应，使得生命有可能发展了。4．Wewatched，________________ontheoutsideofthespaceshipastheearth’sgravityincreased.我们惊奇地看着，随着地球引力的增加，宇宙飞船的外层燃烧起火。5．ButwhenItriedt

7、ostepforward，IfoundIwascarried_________ontheearthandfellover.而当我试着向前迈步时，我发觉我被送出很远，步子的跨度竟是在地球上的两倍，因而我摔倒了。6．“...walkingdoesneedabitofpractice________________gravityhaschanged.”“……既然重力改变了，走路也确实需要练一练了。”Ⅱ.知识详解1.exist　vi.　存在，生存(回归课本P26)Theylaideggstooandexistedonthee

8、arthformorethan140millionyears.它们也生蛋，在地球上生存了一亿四千多万年。[例句探源]①Theycan’texistonthemoneyhe’searning.______________________________________________________②Thereexistsagoodwaytoso