最新人教版高中英语必修3Unit4--reading公开课课件幻灯片.ppt

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1、人教版高中英语必修3Unit4--reading公开课课件PanguseparatestheskyfromtheearthTheGoddessNuwamendedtheheavenandcreatedhumanbeingsfromtheclay(粘土).explodedwithfireandrockproducedwatervapourandgases(2)Whathappenednext?(3)Whatdidthewatervapourandgasesform?theearth’satmosphereW

2、aterappeared(4)Whatappearedastheearthcooleddown?waterisimportantforthebeginningoflifeontheearth.Whyiswatersoimportantforthebeginningoflife?Becausewaterallowedtheearthtodissolveharmfulgasesintooceansandseas.？Stage2Thedevelopmentoflifesmallplantsappearsinwa

3、ter1.Whatlifedevelopedafterwaterappeared?Shellfishandallsortsoffish2.Whatlifedevelopedinwaternext?greenplantsbegantogrowonlandinsectsappeared3.Whataboutthelifeonland?amphibiansonlandandinthewaterforests4.Whatlifedevelopednextonland?reptilesappeareddinosau

4、rdeveloped5.Whatlifedevelopedafterforestsappeared?mammalsonland6.Whatlifedevelopedafterdinosaurs?smallcleveranimals7.Whatlifedevelopedaftermammals?1.Whoarethesmallcleveranimalswithhandsandfeet?2.Aretheytakingcareoftheearthwell?Why?Becausetheyareputtingtoo

5、muchcarbondioxideintotheatmosphere,whichpreventsheatfromescapingfromtheearthintospace.Theearthmaybecometoohottoliveon.Canyoufillintheblanks?23456789101smallplantsinwatersellfishandallsortsoffishinsectsreptilesamphibiansmammalsdinosaurshumansplantsanimalsG

6、reenplantsonlandforests1.Insectsandamphibiansappeared.3.Theearthbecameasolidball.5.Reptilesappeared.7.Theearthwasacloudofdust9.Shellfishandotherfishappeared.11.Cleveranimalswithhandsandfeetappeared2.Dinosaursappeared.4.Smallplantsgrewonthewater.6.Plantsbe

7、gantogrowondryland.8.Waterappearedontheearth10.Theuniversebeganwitha“BigBand”.12.Mammalsappeared.831091151741262Canyouputtheorderofdevelopmentoflifeintoatimeline?Groupwork:describethevideoTheearthisbecominghotterandhotterDiscussionWhatcanwedotopreventthee

8、arthfrombecominghotterandhotter?Eg.Whatwecandoistosaveenergy.Whatwecandoisto…summaryAfterthe“bigbang”,theearthwasstilljustacloudof_______,it_______loudlywithfireandrock,whichwere_____toproducethe_________,watervapou