Uint 4 How Life Began on the Earth

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1、Unit4Reading——Astronomy：thescienceofthestars主讲人：洪敏班级：高一（11）班日期：2012-05-07学习目标:1.学习课文中关于动物种类的相关词汇。2.阅读课文，理清地球生命的起源和发展历程。3.增强环保意识。WarmingupWeliveontheearth,andtherearekindsofanimals.Q：Whatkindsofanimalsarethey?insectamphibian——liveonlandandinthewaterreptiledi

2、nosaurmammalinsectamphibianmammalQ.Howdidtheseanimalsbeginontheearth?Pre-readingWhile-readingReadthepassagequicklyandanswerquestions.Task1:skimmingQ1:Doesanyoneknowhowtheearthbegan?Q2:Howdidtheuniversebegin,accordingtothewidelyacceptedtheory?Q3:Thispassagei

3、sabout.ThedevelopmentoflifeontheearthB.AnimalsC.PlantsD.waterNo,nooneknowsthatexactly.Itbeganwitha“BigBang”.Mainideaofeachparagrapha.Theimportanceofwaterforlifeb.Thedevelopmentofplantsandanimalsontheearthc.Theformationoftheearthd.Awidelyacceptedtheory,“BigB

4、ang”,abouttheuniversee.ThearrivalofhumansandtheirimpactontheearthPara5:Para1:Para2:Para3:Para4:Readthepassageagaincarefullyandunderlinethedevelopmentoflifeintoatimeline.Task2:scanningBigBangwatersmallplantsfishesPlantsonlandInsectsamphibiansforestsreptilesd

5、inosaursmammalshumansPuttheorderofthedevelopmentoflifeintoatimeline1.Insectsandamphibiansappeared.2.Dinosaursappeared.3.Plantsgrewonthewater.4.Reptilesappeared.5.Plantsgrewonland.6.Waterappearedontheearth.7.Theuniversebeganwitha"BigBang".8.Humansappeared.9.

6、Mammalsappeared.835972461Let’shaveatry!1.Wecanlearnthedevelopmentoflifefromthepassage.2.Theanimalscameaftertheplantsgrow.3.Humanbeingsgetalongwellwiththeearth.TrueorfalseTTFAfter-reading（Discussion）Q:Whatproblemarehumanscausing?Greenhouseeffectputtingcarbon

7、dioxideintotheatmospheretheearthmaybecometoo.Asaresultofthat…hottoliveonpollutewatercutdownsomanytreesInordertoprotecttheearth,weshould…planttreessavewaterrecyclerubbishInordertoprotecttheearth,weshould…Whatshouldwelearnfromthispassage?Wordsandexpressionsab

8、outanimals.Theoriginoftheearthandthedevelopmentoflife.Consciousnessofenvironmentprotection.summaryHomework以“environmentprotection”为主题，写一篇100字左右的作文。