高考资源网（www.ks5u.com），您身边的高考专家欢迎广大教师踊跃来稿，稿酬丰厚。www.ks5u.com高考资源网（www.ks5u.com），您身边的高考专家欢迎广大教师踊跃来稿，稿酬丰厚。www.ks5u.comUnit4Astronomy:thescienceofthestars-reading学案HowLifeBeganonTheEarth学习目标：1.Tolearnabouttheoriginoflifeontheearth.2.Tomastertheusagesofsomekeylanguagepoints.3.Todevelopthefeelingoftreasuringtheearthandlife.学习重点：1.Words:①explode②multiply③spread2.Expressions:①whether…ornot②intimetodosth③allow…todo④inone’sturn⑤prevent…from学习
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：自主探究；小组研讨学习过程：Ⅰ.KnowledgelinkInoursolarsystemeightplanetscirclearoundthesun.Doyouknowthem?Ⅱ.Reading1.Fast-readingMainideaofeachparagraphParagraph1TheimportanceofwaterforlifeParagraph2ThedevelopmentofplantsandanimalsontheearthParagraph3TheformationoftheearthParagraph4AwidelyacceptedtheoryabouttheformationoftheuniverseParagraph5Thearrivalofhumansandtheirimpactontheearth2.Careful-readingReadthepassagecarefullyandthenputtheorderofdevelopmentoflifeintoatimeline.A.InsectsandamphibiansappearedB.DinosaursappearedC.TheearthwasacloudofdustD.WaterappearedontheearthE.Theuniversebeganwitha“BigBang”F.TheearthbecameasolidballG.SmallplantsgrewonthewaterH.MammalsappearedI.CleveranimalswithhandsandfeetappearedJ.ReptilesappeaOrder:_________________________________________________________________________CrazyEnglish:(Readthesentencesloudly)1.Accordingtoawidelyacceptedtheory,theuniversebeganwitha“BigBang”thatthrewmatterinalldirections.2.Theearthbecamesoviolentthatitwasnotclearwhethertheshapewouldlastornot.3.Whatisevenmoreimportantisthatastheearthcooleddown,waterbegantoappearedonitssurface.4.Itwasnotimmediatelyobviousthatwaterwastobefundamentaltothedevelopmentoflife.5.Thisproducedachainreaction,whichmadeitpossibleforlifetodevelop.6.Whytheysuddenlydisappearedstillremainsamystery.Ⅲ.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multiplyvt.:①增加，繁殖Rabbitsmultiplyrapidly.②乘，使相乘5multipliedby4equals20.5乘以4等于20.spreadvt.:伸展；延伸；展开；传播spreadoneself舒展四肢spreadover延续Theywereintimetoproducecarbon,nitrogen.intimetodosth:及时去做…；intimetosth合拍子，按节奏Ⅳ.ExercisecaféHearinghissonhurtbadlybyastranger,theman________withanger.AexploredBexposedCexplodedDexplained2.Knowledgeis_______muchmorequicklyontheInternetthaneverbefore.AspreadingBcarryingCdevelopingDgrowing3.Don’tworry.Shewillbeback_______topreparedinner.AontimeBintimeCattimeDfortime4.A:Ourparentswon’tallowustodrivetheircar.B:Ourparents________us_________________theircar.5.A:You’llfeelsorrysoonerorlaterforwhatyou’vedonetoher.B:You’llfeelsorryforwhatyou’vedonetoher_________________Ⅴ.Consolidation(巩固)Howlifebeganontheearth?1.Smallplantsinwaterwater2.ShellfishandallsortsoffishGreenplantsonland3.Insectsonland4.amphibiansonlandandinwater5.reptiles(onland)6.dinosaurs(onland)7.mammals(onland)smallcleveranimalswithhandsandfeet8.humanforestsManhadevolvedfromapes.Ⅵ.学后反思：Wehaveonlyoneearth!Weshouldtakecareofourearth!Ⅶ.Post-classwork:RecitethesentencesinCrazyEnglish.Completethenextlearning-paper.
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