人教版高中英语必修三第四单元课件PPT.ppt

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1、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.Doyouknowthefoll

2、owingterms?star（恒星）planet（行星）thesun/moon/earth（太阳、月亮、地球）solarsystem（太阳系）3.Howmanyplanetsarethereinthesolarsystem?8ScientistsnowthinkPlutoistoosmalltobecalledaplanetThenamesofeightplanets1)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M

3、ercury金星Venus地球Earth火星Mars木星Jupiter土星Saturn天王星UranusInthisunit,we’lllearnsomethingmorescientific1.What’sthetitleofthetext?howlifebeganontheearth2.Fromthetitle,wecanpredictthatthetextmaytellustheoriginoflifeontheearth.Doyouknowsomestoriesaboutit?PanguseparatestheskyfromtheearthNvw

4、amadehumansReadthepassagequicklyandanswerthequestions1.Whendidthe“BigBang”happen?2.Whatformwastheearthafterthe“BigBang”?3.Whatmadeuptheearth’satmosphere？4.Howdidwatercomeintobeingontheearth?5.What’sthesignificanceofthepresenceofwaterontheearth?6.Whatwasimportanttothedevelopmentof

5、fish?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…t

6、odo…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.ScanningReadthepassagequicklyandanswerthequestions2.Whatformwastheearthafterthe“BigBang”?Theearthwasstilljustacloudofdust.3.Whatmadeuptheearth’sat

7、mosphereaftertheearthexploded?Carbon,nitrogen,watervapourandothergases.4.Howdidwatercomeintobeingontheearth?Astheearthcooleddownafteritexploded,watercameintobeing.5.What’sthesignificanceofthepresenceofwaterontheearth?Itallowedtheearthtodissolveharmfulgasesandacidsintotheoceansand

8、seas.6.Whatwasimportanttothedevelopmento