人教新课标必修三+unit+4+astronomy-reading[课件]

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1、Unit4Astronomy:thescienceofthestarsReadingReadparagraph1,andanswerthefollowingquestions.1.Howdidwatercomeintobeingontheearth?2.Whatisthesignificanceofthepresenceofwaterontheearth?Theexplosionoftheearthproducedwatervapour,whichturnedintowaterwhentheearthc

2、ooleddown.Itallowedtheearthtodissolveharmfulgasesintooceansandseas.Reading-II----skimming(3m)自主学习Puttheorderofdevelopmentoflifeintoatimeline.insectsandamphibiansappearasolidballreptilesappearacloudofdustshellfishandotherfishappeardinosaursappearsmallplan

3、tsgrowonthewaterplantsbegintogrowondrylandpresenceofwatermammals(includinghumans)appearDBIGEHACFJ反馈练习Stage1:Thedevelopmentoftheearth(1)AftertheBigBang,whatwastheearthlike?acloudofdustasolidglobe合作探究explodedwithfireandrockproducedwatervapourandgases(2)Wha

4、thappenednext?合作探究Waterappeared(4)Whatappearedastheearthcooleddown?waterisimportantforthebeginningoflifeontheearth.合作探究Whyiswatersoimportantforthebeginningoflife?Becausewaterallowedtheearthtodissolveharmfulgasesandacidsintooceansandseas.？合作探究Stage2Thedev

5、elopmentoflifesmallplantsappearsinwater1.Whatlifedevelopedafterwaterappeared?自主学习Shellfishandallsortsoffish2.Whatlifedevelopedinwaternext?自主学习greenplantsbegantogrowonlandinsectsappeared3.Whataboutthelifeonland?自主学习amphibiansonlandandinthewaterforests4.Wh

6、atlifedevelopednextonland?自主学习reptilesappeareddinosaurdeveloped5.Whatlifedevelopedafterforestsappeared?自主学习mammalsonland6.Whatlifedevelopedafterdinosaurs?自主学习smallcleveranimals7.Whatlifedevelopedaftermammals?自主学习Whataretheydoingontheearth?合作探究Becausethey

7、areputtingtoomuchcarbondioxideintotheatmosphere,whichpreventsheatfromescapingfromtheearthintospace.Theearthmaybecometoohottoliveon.1.Insectsandamphibiansappeared.3.Theearthbecameasolidball.5.Reptilesappeared.7.Theearthwasacloudofdust9.Shellfishandotherfi

8、shappeared.11.Cleveranimalswithhandsandfeetappeared2.Dinosaursappeared.4.Smallplantsgrewonthewater.6.Plantsbegantogrowondryland.8.Waterappearedontheearth10.Theuniversebeganwitha“BigBand”.12.Mammalsappeared.831091151741262C