高一英语（下）必修三Unit 4 Para 1-3.ppt

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1、Unit4Astronomy--thescienceofthestarsThedevelopmentoflifeHaveyouheardofanyancientstoryaboutthebeginningoflife?PanguseparatestheskyfromtheearthTheGoddessNuwamendedtheheavenandcreatedhumanbeingsGodcreatedtheworldinsevendaystheBigBangreligiousorscientific

2、religiousscientificHOWLIFEBEGANONTHEEARTHAccordingtothetitle,whichofthefollowingwordsdoyouthinkwillappearinthereadingpassage?Why?atmosphereplanetmammalindependentfestivaloxygendisappointedharmfulreligiousdevelopmentcustomdietListentothetapeandcheckyou

3、rguessing.atmosphereplanetmammaloxygenharmfuldevelopmentHowmanypartscanthispassagebedividedinto?Whatdoeseachpartmainlytalkabout?Part1(Para1)Part2(Para2-4)WateranditsimportanceThedevelopmentoflivesPara2-3livesbeforehumansPara4humansacloudofdustaviolent

4、solidballDetailedreadingPara11.Whatwasimportantforthebeginningoflifeontheearth?Andhowdiditcomeintobeing?WaterTheexplosionoftheearthproducedwatervapour,whichturnedintowaterwhentheearthcooleddown.explodedwithfireandrockproducedwatervapourandgasestheeart

5、h’satmosphereWaterappeared–importantforthebeginningoflifeontheearthWhy?Becauseitallowedtheearthtodissolveharmfulgasesintotheoceansandseas.1.Whywastheearthdifferentfromotherplanets?Aitproducedalotofheat.B.Thewaterremained.CWaterdisappeared.D.Itwastheol

6、destplanet.2.Whywaslifeabletodevelopontheearthbutnotonotherplanets?ATheearthhadasolidshape.B.Theearthdidnothaveharmfulgasesinitsatmosphere.CThewaterstayedontheearthbutnotonotherplanets.D.Theearthwasnottoohotandnottoocold.Overoftheearth’ssurfaceiscover

7、edbywater70%Para2&3Findoutthelivesfromthispart.1smallplantsinthewater2shellfishandotherfish3greenplantsonland4landanimalsinsectsamphibians5reptiles6dinosaurs7mammalsSmallplantsinwaterShellfishandallsortsoffishGreenplantsonland____________and____theoce

8、ansandseaswith_________.multipliedfilledoxygenencouragedmanymillionsyearslaterappearedTakingfromtheatmosphereandfillingthewithoxygenlifetodevelop.carbondioxideairhelpedlaterlandanimalsInsects(onland)Amphibians(onlandandinwater)encouragedThepla