人教版高中英语必修三第四单元完整ppt课件

.,1,ModuleIIIUnit4Astronomy,玉树二高2014级高一十四班,.,2,I.Warmingup,Whatsthemeaningoftheword“Astronomy”?2.Doyouknowthefollowingterms?star（）planet（）thesun/moon/earth（）solarsystem（）3.Howmanyplanetsareinthesolarsystem?,.,3,I.Warmingup,Whatsthemeaningoftheword“Astronomy”?thescienceofstars;2.Doyouknowthefollowingterms?star（恒星）planet（行星）thesun/moon/earth（太阳、月亮、地球）solarsystem（太阳系）3.Howmanyplanetsarethereinthesolarsystem?8,.,4,ScientistsnowthinkPlutoistoosmalltobecalledaplanet,.,5,Thenamesofeightplanets,1)水星Mercury2)金星Venus3)地球Earth4)火星Mars5)木星Jupiter6)土星Saturn7)天王星Uranus8)海王星Neptune,.,6,海王星Neptune,水星Mercury,金星Venus,地球Earth,火星Mars,木星Jupiter,土星Saturn,天王星Uranus,.,7,Inthisunit,welllearnsomethingmorescientific,1.Whatsthetitleofthetext?howlifebeganontheearth2.Fromthetitle,wecanpredictthatthetextmaytellustheoriginoflifeontheearth.Doyouknowsomestoriesaboutit?,.,8,Panguseparatestheskyfromtheearth,.,9,Nvwamadehumans,.,10,Readthepassagequicklyandanswerthequestions,1.Whendidthe“BigBang”happen?2.Whatformwastheearthafterthe“BigBang”?3.Whatmadeuptheearthsatmosphere？4.Howdidwatercomeintobeingontheearth?5.Whatsthesignificanceofthepresenceofwaterontheearth?6.Whatwasimportanttothedevelopmentoffish?7.Whatmadepossibletheriseofmammalsontheearth?8.Whyaremammalsdifferentfromalllifeformsinthepast?,.,11,PhrasesandUsefulExpressions,circlearound绕转accordingto根据awidelyacceptedtheory熟知的理论inalldirections向着四面八方intime及时；终于cooldown冷却befundamentalto对关键achainaction连锁反应makeitpossiblefortodo使可能givebirthto生育11.preventfrom阻止做12.millionsofyearstocome未来的几百万年,.,12,1.Whendidthe“BigBang”happen?Ithappenedseveralbillionyearsago.,Scanning,Readthepassagequicklyandanswerthequestions,.,13,2.Whatformwastheearthafterthe“BigBang”?Theearthwasstilljustacloudofdust.3.Whatmadeuptheearthsatmosphereaftertheearthexploded?Carbon,nitrogen,watervapourandothergases.,.,14,4.Howdidwatercomeintobeingontheearth?Astheearthcooleddownafteritexploded,watercameintobeing.,.,15,5.Whatsthesignificanceofthepresenceofwaterontheearth?Itallowedtheearthtodissolveharmfulgasesandacidsintotheoceansandseas.,.,16,6.Whatwasimportanttothedevelopmentoffish?oxygen.7.Whatmadepossibletheriseofmammalsontheearth?Thedisappearanceofdinosaursmadethepossibletheriseofmammalsontheearth.,.,17,8.Whyaremammalsdifferentfromalllifeformsinthepast?Theygavebirthtoyoungbabyanimalsandproducedmilktofeedthem.,.,18,Closereading,I.Readthepassagecarefullyandmatchthemainideawitheachparagraph.,.,19,Para.1A.Theformation(形成)oftheearth.Para.2B.Theimportanceofwaterforlife.Para.3C.Awidelyacceptedtheoryabouttheformationoftheuniverse.Para.4D.Thearrivalofhumansandtheirimpactontheearth.Para.5E.Thedevelopmentofplantsandanimalsontheearth.,.,20,True(T)orFalse(F).1.TheearthappearedbeforetheBigBanghappened.2.Theoriginalatmosphereconsistedofnitrogenandoxygen.3.Themaindifferencebetweentheearthandotherplanetsisthatthereiswaterontheearth.4.Lifebeganinwaterandthenonland.,F,F,T,T,.,21,Summary,Whatdowelearntoday?,.,22,Summary,Howlifebeganontheearth.,.,23,Puttheorderofdevelopmentoflifeintoatimeline.Usethereadingpassagetohelpyou.,1.Insectsandamphibiansappeared.(10)2.Dinosaursappeared.()3.Theearthbecameasolidball.()4.Smallplantsgrewonthewater.(8)5.Reptilesappeared.()6.Plantsbegantogrowondryland.(),.,24,7.Theearthwasacloudofdust.()8.Waterappearedontheearth.(1)9.Shellfishandotherfishappeared.()10.TheuniversebeganwithaBigBang.()11.Cleveranimalswithhandsandfeetappeared.(12)12.Mammalsappeared.(),.,25,discussing,Whatshouldwedoforourearth?,.,26,Youcanusethefollowingwordsorphrasestohelpyou