人教新課標(biāo)必修三+unit+4+astronomy-reading[課件]

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

2、ooleddown.Itallowedtheearthtodissolveharmfulgasesintooceansandseas.Reading-II----skimming(3m)自主學(xué)習(xí)Puttheorderofdevelopmentoflifeintoatimeline.insectsandamphibiansappearasolidballreptilesappearacloudofdustshellfishandotherfishappeardinosaursappearsmallplan

3、tsgrowonthewaterplantsbegintogrowondrylandpresenceofwatermammals(includinghumans)appearDBIGEHACFJ反饋練習(xí)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?自主學(xué)習(xí)Shellfishandallsortsoffish2.Whatlifedevelopedinwaternext?自主學(xué)習(xí)greenplantsbegantogrowonlandinsectsappeared3.Whataboutthelifeonland?自主學(xué)習(xí)amphibiansonlandandinthewaterforests4.Wh

6、atlifedevelopednextonland?自主學(xué)習(xí)reptilesappeareddinosaurdeveloped5.Whatlifedevelopedafterforestsappeared?自主學(xué)習(xí)mammalsonland6.Whatlifedevelopedafterdinosaurs?自主學(xué)習(xí)smallcleveranimals7.Whatlifedevelopedaftermammals?自主學(xué)習(xí)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