《Astronomy：thescienceofthestars》学案5（新人教版必修3）

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1、Unit4Astronomy:thescienceofthestars-reading学案HowLifeBeganonTheEarth学习目标：1.Tolearnabouttheoriginoflifeontheearth.2.Tomastertheusagesofsomekeylanguagepoints.3・Todevelopthefeelingoftreasuringtheearthandlife・学习重点：1.Words:①explode©multiply③spread2.Expressions:①whether…ornot②intimetodosth©allow...todo@

2、inone'sturn©prevent.・・from学习方法：自主探究；小组研讨学习过程：I・KnowledgelinkInoursolarsystemeightplanetscirclearoundthesun.

3、Doyouknowthem?II.ReadingLFast-readingMainideaofeachparagraphParagraph1TheimportanceofwaterforlifeParagraph2ThedevelopmentofplantsandanimalsontheearthParagraph3TheformationoftheearthParagrap

4、h4AwidelyacceptedtheoryabouttheformationoftheuniverseParagraph5Thearrivalofhumansandtheirimpactontheearth2.Careful-readingReadthepassagecarefullyandthenputtheorderofdevelopmentoflifeintoatimeline.B.DinosaursappearedA.InsectsandamphibiansappearedC-TheearthwasacloudofdustD.WaterappearedontheearthF.

5、TheearthbecameasolidballH.MammalsappearedJ.ReptilesappeaE.Theuniversebeganwitha"BigBang，'G.SmallplantsgrewonthewaterI.CleveranimalswithhandsandfeetappearedOrder:CrazyEnglish:(Readthesentencesloudly)1.Accordingtoawidelyacceptedtheoiytheuniversebeganwitha"BigBang^thatthrewmatterinalldirections.2.Th

6、eecirthbecamesoviolentthatitwasnotclearwhethertheshapewouldlastornot.3・Whatisevenmoreimportantisthatastheearthcooleddown,waterbegantoappearedonitssurface.4.1twasnotimmediatelyobviousthatwaterwastobefundamentaltothedevelopmentoflife.5.Thisproducedachainreaction,whichmadeitpossibleforlifetodevelop・

7、6・Whytheysuddenlydisappearedstillremainsamystery.II.Learningaboutlanguage1.explodevt.:使爆炸爆发；破除(迷信等)，戳穿，驳倒explorevt.:探究探索，钻研考察1.multiplyvt.:①增加,繁殖Rabbitsmultiplyrapidly.②乘，使相乘5multipliedby4equals20.5乘以4等于20.2.spreadvt.:伸展；延伸；展开；传播spreadoneself舒展四肢spreadover延续3.Theywereintimetoproducecarbon,nitroge

8、n.intimetodosth:及时去做…；intimetosth合拍子,按节奏III.Exercisecafe1.Hearinghissonhurtbadlybyastranger,themanwithanger.AexploredBexposedCexplodedDexplained1.KnowledgeismuchmorequicklyontheInternetthaneverbefore.AspreadingBcarryin