杨晓UNIT4导学案

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1、Unit4Astronomy:thescienceofthestars审核：高一英语组班级：姓名：Learningaims1.GetthestudentstoknowbasicknowledgeaboutAstronomy:thescienceofthestars.2.Readthetextandtrytounderstandthemainideaofthetext.Importantanddifficultpoints1.Tounderstandthetextfully,andtherightorderofth

2、edevelopmentoflifeandtheearth.2.Letthestudentsgraspthemainideaandthestructureofthepassage.Instructions1.Reviewthenewwordsandtextinunit4.2.Arousethestudents’interestinastronomy.3Finishtheexercisesbyreferringtoyourtextbooksandtickoutyourdifficultiesbeforeclass.

3、课前热身：Task1.PhraseCheck1.绕…转2.根据3.熟知的理论4.向着四面八方5.及时；终于6.冷却7.对…关键8.连锁反应9.使…可能10.生育11.阻止…做…12.未来的几百万年语篇导读Task2.MatchthemainideaofeachparagraphParagraph1:TheimportanceofwaterforlifeParagraph2:ThedevelopmentofplantsandanimalsontheearthParagraph3:Theformationofthee

4、arthParagraph4:AwidelyacceptedtheoryabouttheformationoftheuniverseParagraph5:ThearrivalofhumansandtheirimpactontheearthTask3.Trueorfalse1.Accordingtoawidelyacceptedtheory,theuniversebeganwitha“BigBang”,afterwhichtheearthwasstillacloudofdustforseveralbillionye

5、ars.()2.Astheearthcooleddown,waterbegantoappearonitssurface.()3.Waterallowedtheearthtodissolveharmfulgasesandacids,anditonlyappearedontheearth.()4.Asformammals,theyproducedyounggenerallybylayingeggs.()5.Cleveranimalswithhandsandfeet,intheirturn,areprotectingt

6、heearthwellinsteadofotherlessimportantanimals.()Task4.Detailedreading.1WhathappenedafterBigBang?2Whathappenedbetween4.5and3.8billionyearsago?3Whatweretomaketheearth’satmosphere?4.Whywaterwasimportantformakingitpossibleforlifetodevelop?5.Didplantsappearfirstor

7、animalscomefirst?Andwhy?6.Whichturnedupfirst:reptiles,mammalsoramphibians?7.What’sthedifferencebetweenmammalsandreptiles?8.Whatarehumanbeingsdoingatpresent?合作探究：WhatwillhappenwhenweputtoomuchCO2intotheatmosphere?课后巩固Puttheorderofdevelopmentoflifeintoatimeline

8、.A.insectsandamphibiansappearB.asolidballC.reptilesappearD.acloudofdustE.shellfishandotherfishappearF.dinosaursappearG.smallplantsgrowonthewaterH.plantsbegintogrowondrylandI.presenceofwat