人教版高中英语必修三第四单元课件PPT.ppt

ModuleIIIUnit4Astronomy 玉树二高2014级高一十四班 I Warmingup What sthemeaningoftheword Astronomy 2 Doyouknowthefollowingterms star planet thesun moon earth solarsystem 3 Howmanyplanetsareinthesolarsystem I Warmingup 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 ScientistsnowthinkPlutoistoosmalltobecalledaplanet 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 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 lllearnsomethingmorescientific 1 What sthetitleofthetext howlifebeganontheearth2 Fromthetitle wecanpredictthatthetextmaytellustheoriginoflifeontheearth Doyouknowsomestoriesaboutit Panguseparatestheskyfromtheearth Nvwamadehumans Readthepassagequicklyandanswerthequestions 1 Whendidthe BigBang happen 2 Whatformwastheearthafterthe BigBang 3 Whatmadeuptheearth satmosphere 4 Howdidwatercomeintobeingontheearth 5 What sthesignificanceofthepresenceofwaterontheearth 6 Whatwasimportanttothedevelopmentoffish 7 Whatmadepossibletheriseofmammalsontheearth 8 Whyaremammalsdifferentfromalllifeformsinthepast 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 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 Scanning Readthepassagequicklyandanswerthequestions 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 Closereading I 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 F F T T Summary 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 Theuniversebeganwitha BigBang 11 Cleveranimalswithhandsandfeetappeared 12 12 Mammalsappeared discussing Whatshouldwedoforourearth Youcanusethefollowingwordsorphrasestohelpyo