人教版高中英语必修三第四单元课件PPT

ModuleIIIUnit4Astronomy玉树二高2014级高一十四班I.Warmingup1.What'sthemeaningoftheword“Astronomy”?2.Doyouknowthefollowingterms?star（）planet（）thesun/moon/earth（）solarsystem（）3.Howmanyplanetsareinthesolarsystem?I.Warmingup1.What'sthemeaningoftheword“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ScientistsnowthinkPlutoistoosmalltobecalledaplanetThenamesofeightplanets1)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UranusInthisunit,we’lllearnsomethingmorescientific1.What’sthetitleofthetext?howlifebeganontheearth2.Fromthetitle,wecanpredictthatthetextmaytellustheoriginoflifeontheearth.Doyouknowsomestoriesaboutit?PanguseparatestheskyfromtheearthNvwamadehumansReadthepassagequicklyandanswerthequestions1.Whendidthe“BigBang”happen?2.Whatformwastheearthafterthe“BigBang”?3.Whatmadeuptheearth’satmosphere？4.Howdidwatercomeintobeingontheearth?5.What’sthesignificanceofthepresenceofwaterontheearth?6.Whatwasimportanttothedevelopmentoffish?7.Whatmadepossibletheriseofmammalsontheearth?8.Whyaremammalsdifferentfromalllifeformsinthepast?PhrasesandUsefulExpressions1.circlearound绕…转2.accordingto…根据3.awidelyacceptedtheory熟知的理论4.inalldirections向着四面八方5.intime及时；终于6.cooldown冷却7.befundamentalto…对…关键8.achainaction连锁反应9.…makeitpossiblefor…todo…使…可能10.givebirthto…生育11.prevent…from阻止…做…12.millionsofyearstocome未来的几百万年1.Whendidthe“BigBang”happen?Ithappenedseveralbillionyearsago.ScanningReadthepassagequicklyandanswerthequestions2.Whatformwastheearthafterthe“BigBang”?Theearthwasstilljustacloudofdust.3.Whatmadeuptheearth’satmosphereaftertheearthexploded?Carbon,nitrogen,watervapourandothergases.4.Howdidwatercomeintobeingontheearth?Astheearthcooleddownafteritexploded,watercameintobeing.5.What’sthesignificanceofthepresenceofwaterontheearth?Itallowedtheearthtodissolveharmfulgasesandacidsintotheoceansandseas.6.Whatwasimportanttothedevelopmentoffish?oxygen.7.Whatmadepossibletheriseofmammalsontheearth?Thedisappearanceofdinosaursmadethepossibletheriseofmammalsontheearth.8.Whyaremammalsdifferentfromalllifeformsinthepast?Theygavebirthtoyoungbabyanimalsandproducedmilktofeedthem.ClosereadingI.Readthepassagecarefullyandmatchthemainideawitheachparagraph.Para.1A.Theformation(形成)oftheearth.Para.2B.Theimportanceofwaterforlife.Para.3C.Awidelyacceptedtheoryabouttheformationoftheuniverse.Para.4D.Thearrivalofhumansandtheirimpactontheearth.Para.5E.Thedevelopmentofplantsandanimalsontheearth.True(T)orFalse(F).1.TheearthappearedbeforetheBigBanghappened.2.Theoriginalatmosphereconsistedofnitrogenandoxygen.3.Themaindifferencebetweentheearthandotherplanetsisthatthereiswaterontheearth.4.Lifebeganinwaterandthenonland.FFTTSummaryWhatdowelearntoday?SummaryHowlifebeganontheearth.Puttheorderofdevelopmentoflifeintoatimeline.Usethereadingpassagetohelpyou.1.Insectsandamphibiansappeared.(10)2.Dinosaursappeared.()3.Theearthbecameasolidball.()4.Smallplantsgrewonthewater.(8)5.Reptilesappeared.()6.Plantsbegantogrowondryland.()7.Theearthwasacloudofdust.()8.Waterappearedontheearth.(1)9.Shellfishandotherfishappeared.()10.TheuniversebeganwithaBigBang.()11.Cleveranimalswithhandsandfeetappeared.(12)12.Mammalsappeared.()discussingWhatshouldwedoforourearth?Youcanusethefollowingwordsorphrasestohelpyou:prevent…from…/harmfulglobalwarming/carbondioxide/dependonasaresult/inturn……Homework1.Findthedifficultiesinthepassage.2.FinishLearningaboutLanguagepartonPage28.EndThankyou