人教版高中英语必修三第四单元课件PPT.ppt 28页

'ModuleIIIUnit4Astronomy玉树二高2014级高一十四班 I.WarmingupWhat"sthemeaningoftheword“Astronomy”?2.Doyouknowthefollowingterms?star（）planet（）thesun/moon/earth（）solarsystem（）3.Howmanyplanetsareinthesolarsystem? I.WarmingupWhat"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 ScientistsnowthinkPlutoistoosmalltobecalledaplanet Thenamesofeightplanets1)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Uranus Inthisunit,we’lllearnsomethingmorescientific1.What’sthetitleofthetext?howlifebeganontheearth2.Fromthetitle,wecanpredictthatthetextmaytellustheoriginoflifeontheearth.Doyouknowsomestoriesaboutit? Panguseparatestheskyfromtheearth Nvwamadehumans Readthepassagequicklyandanswerthequestions1.Whendidthe“BigBang”happen?2.Whatformwastheearthafterthe“BigBang”?3.Whatmadeuptheearth’satmosphere？4.Howdidwatercomeintobeingontheearth?5.What’sthesignificanceofthepresenceofwaterontheearth?6.Whatwasimportanttothedevelopmentoffish?7.Whatmadepossibletheriseofmammalsontheearth?8.Whyaremammalsdifferentfromalllifeformsinthepast? PhrasesandUsefulExpressionscirclearound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…makeitpossiblefor…todo…使…可能givebirthto…生育11.prevent…from阻止…做…12.millionsofyearstocome未来的几百万年 1.Whendidthe“BigBang”happen?Ithappenedseveralbillionyearsago.ScanningReadthepassagequicklyandanswerthequestions 2.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.FFTT SummaryWhatdowelearntoday? SummaryHowlifebeganontheearth. Puttheorderofdevelopmentoflifeintoatimeline.Usethereadingpassagetohelpyou.1.Insectsandamphibiansappeared.(10)2.Dinosaursappeared.()3.Theearthbecameasolidball.()4.Smallplantsgrewonthewater.(8)5.Reptilesappeared.()6.Plantsbegantogrowondryland.() 7.Theearthwasacloudofdust.()8.Waterappearedontheearth.(1)9.Shellfishandotherfishappeared.()10.Theuniversebeganwitha"BigBang".()11.Cleveranimalswithhandsandfeetappeared.(12)12.Mammalsappeared.() discussingWhatshouldwedoforourearth? Youcanusethefollowingwordsorphrasestohelpyou:prevent…from…/harmfulglobalwarming/carbondioxide/dependonasaresult/inturn…… Homework1.Findthedifficultiesinthepassage.2.Finish"LearningaboutLanguage"partonPage28. EndThankyou'