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1、2019-2020年高中英语Unit4Astronomythescienceofthestars导学案1新人教版必修3【学习目标】1.Throughseriesofactivities,thestudentswillbeableto1.speakouttheChinese1meaningsofthewords&phrasesandpronouncethemcorrectly.2.usethewords&phrasescorrectly【教学重点】Enablethestudentstograsptheusagesof
2、suchimportantnewwordsandexpressionsasvoilent,unlikefundamental,dissolve,multiply,exist,prevent,intime,layeggs,givebirthto,blockoutandsoon.【教学难点】Howtoenablethestudentstograsptheusagesofkeywordsandunderstandsomedifficultandlongsentences.【知识链接】名词性从句——宾语从句、表语从句;非限
3、定定语从句【自主预习】Wordsvoilent,unlikefundamental,dissolve,multiply,exist,preventExpressionsintime,layeggs,givebirthto,blockout,cheerupPatterns1.Itexplodedloudlywithfireandrock,whichwereintimetoproducethewatervapor,carbondioxide,oxygen,nitrogenandothergases,whichweret
4、omaketheearth’satmosphere.2.Nobodyknewthatitwasgoingtobedifferentfromotherplanetsgoingroundthesun.3.Itallowedtheearthtodissolveharmfulgases,whichhadbeepartoftheearth’satmosphere,intotheoceansandseas.4.Thisencouragedthedevelopmentofearlyshellfishandallsortsoffi
5、sh.5.Theyproducedyounggenerallybylayingeggs.【自学检测】Readthetextcarefullyandfillintheblanks:Theearthwasjustacloudof____afterthe“BigBang”.Theearth______loudlywithfireandrock.Theywerein_____toproducemanythings,whichweretomaketheearth’satmosphere.Astheearthcooleddow
6、n,waterbegantoappearonitssurface.Itallowedtheearthtodissolve______gases.Thenlifebegantodevelop.Thefirstsmallplants______andfilledtheoceansandseaswithoxygen.Thisencouragedthe_______ofearlyshellfishandfish.Landanimalssuchasinsects,reptilesanddinosaursandsononapp
7、earedaftergreenplantsappeared.Smallcleveranimals__allovertheearth.Theyareputtingtoo___carbondioxideintotheatmosphere,which___heatfromtheearthintospace.Whetherlifewillcontinueontheearthformillionsofyearstoewill_____onwhetherthisproblemcanbesolved.【预习疑问】【课堂探究】Ta
8、sk1Readthetextaloudandthenuseownwordstoretellit.Task2Thefollowingaresomeimportantwordsandphrases.Trytobeclearabouttheirmeaningsandreadthemcorrectly.Permit;account;stare;patiencevoi
