人教版新课标高中英语必修三Unit-4《Astronomy-the-science-of-the-stars》(Reading)课件

Unit4Astronomy:thescienceofthestars

ReadingReadparagraph1,andanswerthefollowingquestions.1.Howdidwatercomeintobeingontheearth?2.Whatisthesignificanceofthepresenceofwaterontheearth?Theexplosionoftheearthproducedwatervapour,whichturnedintowaterwhentheearthcooleddown.Itallowedtheearthtodissolveharmfulgasesintooceansandseas.Reading-IIskimming(3m)自主学习Puttheorderofdevelopmentoflifeintoatimeline.insectsandamphibiansappearasolidballreptilesappearacloudofdustshellfishandotherfishappeardinosaursappearsmallplantsgrowonthewaterplantsbegintogrowondrylandpresenceofwatermammals(includinghumans)appearDBIGEHACFJ反馈练习Stage1:Thedevelopmentoftheearth(1)AftertheBigBang,whatwastheearthlike?

acloudofdust

asolidglobe合作探究explodedwithfireandrock

producedwatervapourandgases(2)Whathappenednext?合作探究Waterappeared(4)Whatappearedastheearthcooleddown?waterisimportantforthebeginningoflifeontheearth.

合作探究

Whyiswatersoimportantforthebeginningoflife?

Becausewaterallowedtheearthtodissolveharmfulgasesandacidsintooceansandseas.？合作探究Stage2Thedevelopmentoflifesmallplantsappearsinwater1.Whatlifedevelopedafterwaterappeared?自主学习Shellfishandallsortsoffish2.Whatlifedevelopedinwaternext?自主学习

greenplantsbegantogrowonland

insectsappeared3.Whataboutthelifeonland?自主学习amphibiansonlandandinthewaterforests4.Whatlifedevelopednextonland?自主学习

reptilesappeared

dinosaurdeveloped5.Whatlifedevelopedafterforestsappeared?自主学习mammalsonland6.Whatlifedevelopedafterdinosaurs?自主学习smallcleveranimals7.Whatlifedevelopedaftermammals?自主学习Whataretheydoingontheearth?合作探究

Becausetheyareputtingtoomuchcarbondioxideintotheatmosphere,whichpreventsheatfromescapingfromtheearthintospace.Theearthmaybecometoohottoliveon.Canyouputtheorderofdevelopmentoflifeintoatimeline?直击高考1.Insectsandamphibiansappeared.3.Theearthbecameasolidball.5.Reptilesappeared.7.Theearthwasacloudofdust9.Shellfishandotherfishappeared.11.Cleveranimalswithhandsandfeetappeared2.Dinosaursappeared.

4.Smallplantsgrewonthewater.6.Plantsbegantogrowondryland.8.Waterappearedontheearth10.Theuniversebeganwitha“BigBand”.12.Mammalsappeared.831091151741262Ex.2onP277.Concludethemainideaofeachparagraph.1)Awidely______aboutthe_____oftheuniverse.2)Theformationofthe______.3)The__________ofwaterforlife.4)Thedevelopmentof______and_______ontheearth.5)Thearrivalof_______andtheir_____ontheearth.Thetextmainlytellsusthe_________oftheearthandthe___________oflifeonit.8.ThemainideaofReading1.Ex.1onP27theoryoriginearthimportanceplantsanimalshumansinfluence/effectformationdevelopment直击高考Howlifebeganonearthisoneofthebiggestpuzzlesthatscientistsfoundhardtosolve.Whatotherpuzzlesarehiddeninthepassage?DiscussionEx.5onP27Howdoestheuniverse(earth)form?Whydidtheearthcooldown?Whydidwaterdisappearon