人教课标版英语必修三Unit4 Astronomy-Warming up and reading.ppt课件.ppt

ModuleIIIUnit4,Astronomy,Whatsthemeaningoftheword“Astronomy”?,I.Warmingup,thescienceofstars;thescientificstudyofstarsandplanets.,2.Whatwordswillyouthinkofwhenwetalkaboutthistopic?,star,planet,thesun/moon/earth,solarsystem,恒星行星太阳月球地球太阳系,3.Howmanyplanetsareinthesolarsystem?,8,Pluto,ScientistsnowthinkPlutoistoosmalltobecalledaplanet.,4.Doyouknowthecorrectorderoftheirdistancetothesun?,nearesttothesun?,farthesttothesun?,5.Thenamesofeightplanets.,MercuryVenusEarthMarsJupiterSaturnUranusNeptune,1)水星2)金星3)地球4)火星5)木星6)土星7)天王星8)海王星,Mercury,Venus,Earth,Mars,Jupiter,Uranus,Saturn,Neptune,6.PutthemincorrectorderonP25.,Doyouknowtheirorigin?,II.Pre-reading,Haveyoueveraskedyourmother,“Mom,wheredoIcomefrom”?,2.Nearlyeverybodyhasthisorthatpuzzles:Howdohumanbeingscomeintobeing?Howdoestheearthcomeintobeing?,3.InChina,therearetwolegendsaboutthesepuzzles.Doyouknowthenames?,盘古开天辟地女娲补天造人,4.Inthewesternculture,whocreateseverythingintheworld?,TheGod,III.Fast-reading,Doyoubelieveinsuchstories?Aretheybasedonscience?,2.Inthisunit,welllearnsomethingmorescientific.3.Whatsthetitleofthetext?,4.Fromthetitle,wecanpredictthatthetextmaytellustheoriginoflifeontheearth.,Howlifebeganontheearth,5.Whichquestionareyouinterestedininthistext?,1)Howoldistheearth?2)Howdoestheuniversebegin?3)IsthereanywaterintheMars?4)Whendiddinosaursdisappear?5)Whichanimalisthemostimportantoneontheearth?,6.Doyouknowwhichparagraphyoucanfindouttheanswer?,Para.4,Para.2,Para.3,Para.5,Para.1,7.Concludethemainideaofeachparagraph.1)Awidely_aboutthe_oftheuniverse.2)Theformationofthe_.3)The_ofwaterforlife.4)Thedevelopmentof_and_ontheearth.5)Thearrivalof_andtheir_ontheearth.Thetextmainlytellsusthe_oftheearthandthe_oflifeonit.,8.ThemainideaofReading1.,Ex.1onP27,theory,origin,earth,importance,plants,animals,humans,influence/effect,formation,development,DetailedreadingThistextcanmainlydividedintotwostages,Stage1:ThedevelopmentoftheearthStage2:Thedevelopmentoflife,(para13),(para45),Stage1:Thedevelopmentoftheearth,(1)AftertheBigBang,whatwastheearthlike?,acloudofdust,asolidglobe,explodedwithfireandrock,producedwatervapourandgases,(2)Whathappenednext?,(3)Whatdidthewatervapourandgasesform?,theearthsatmosphere,Waterappeared,(4)Whatappearedastheearthcooleddown?,waterisimportantforthebeginningoflifeontheearth.,Whyiswatersoimportantforthebeginningoflife?Becausewaterallowedtheearthtodissolveharmfulgasesintooceansandseas.,？,Stage2Thedevelopmentoflife,smallplantsappearsinwater,1.Whatlifedevelopedafterwaterappeared?,Shellfishandallsortsoffish,2.Whatlifedevelopedinwaternext?,greenplantsbegantogrowonland,insectsappeared,3.Whataboutthelifeonland?,amphibiansonlandandinthewater,forests,4.Whatlifedevelopednextonland?,reptilesappeared,dinosaurdeveloped,5.Whatlifedevelopedafterforestsappeared?,mammalsonland,6.Whatlifedevelopedafterdinosaurs?,smallcleveranimals,7.Whatlifedevelopedaftermammals?,1.Whoarethesmallcleveranimalswithhandsandfeet?2.Aretheytakingcareoftheearthwell?Why?,?,Becausetheyareputtingtoomuchcarbondioxideintotheatmosphere,whichpreventsheatfromescapingfromtheearthintospace.,Theearthmaybecometoohottoliveon.,Canyoufillintheblanks?,2,3,45,6,78910,1smallplantsinwater,shellfishandallsortsoffish,insects,reptiles,amphibians,mammals,dinosaurs,humans,plants,animals,Greenplantsonland,forests,1.Insectsandamphibiansappeared.3.Theearthbecameasolidball.5.Reptilesappeared.7.Theearthwasacloudofdust9.Shellfishandotherfishappeared.11.Cleveranimalswithhandsandfeetappeared,2.Dinosaursappeared.4.Smallplantsgrewonthewater.6.Plantsbegantogrowondryland.8.Waterappearedontheearth10.Theuniversebeganwitha“BigBand”.12.Mammalsappeared.,8,3,10,9,11,5,1,7,4,12,6,2,Canyouputtheorderofdevelopmentoflifeintoatimeline?,Ex.2onP27,Howlifebeganonearthisoneofthebiggestpuzzlesthatscientistsfoundhardtosolve.Whatotherpuzzlesarehiddeninthepassage?,Discussion,Ex.5onP27,Howdoestheuniverse(earth)form?Whydidtheearthcooldown?Whydidwaterdisappearonotherplanet?Howdidthedinosaurdisappear?,summary,Afterthe“bigbang”,theearthwasstilljustacloudof_,it_loudlywithfireandrock,whichwere_toproducethe_,watervapourandothergases.Then_begantoappearedontheearth.,dust,exploded,intime,carbon,water,_inwaterareconsideredtobetheearliestlivesontheearth.TheO2theysuppliedencouragedthelivesof_.Slowlygreenplantsgrewonland,whichwerefollowedby_likeinsects&_.Whentheplantsgrewinto_,_appeared.Then_developedbutdisappearedlater,whichmadetheriseofatotallydifferentanimal,_,pos