人教版必修三unit4-reading.ppt

Unit4Astronomy:thescienceofthestars,人教版英语必修三unit4编者：内蒙古巴彦淖尔市奋斗中学英语组贾魏巍,天文学天文学家太阳系原子猛烈的；激烈的二氧化碳大气层连锁反应氧气水生有壳动物两栖动物恐龙哺乳动物,Astronomy,Astronomer,Solarsystem,Atom,Violent,Carbondioxide,Chainreaction,Amphibian,Oxygen,mammal,Dinosaur,Shellfish,Atmosphere,newwords,TheSolarsystem,eightplanetsmanycometsotherobjects,WarmingUp,Thereusedtobenineplanetsinthesolarsystem.Recentlyscientistshavedecidedthatoneofthemcannolongerbeconsideredaplanet.Doyouknowthenameofthatplanet?Doyouknowwhytheyremovedit?,Pluto.Scientistsnowthinkitistoosmalltobecalledaplanet.,Pluto,sun,Mercury,Venus,Earth,Mars,Jupiter,Saturn,Uranus,Neptune,Pluto,水星,金星,火星,木星,土星,天王星,海王星,冥王星,TheSolarsystem,Eachreligionandculturehasitsownideasabouthowlifebeganonearth.Whatdoyouknow?,Pre-reading,Inchina,Panguseparatedtheskyfromtheearth,TheGoddessNvwamendedtheheavenandcreatedhumanbeings.,Inchina：,Inothercountries：,TheHolyBiblesaysthattheGodcreatedtheworldandthehumanbeings,InIndia：Brahma(梵天)isthecreator(创造者)oftheuniverseandalllivingbeings（生物）,BigBang,WaterAirsun,Wateristheheadspring(源泉)oflife.,?,Whatisthemostimportantthingforalltypesoflifeontheearth?,HowLifeBeganontheEarth,Para.1Theformation(形成)oftheearth.Para.2Theimportanceofwaterforlife.Para.3Awidelyacceptedtheoryabouttheformationoftheuniverse.Para.4Thearrivalofhumansandtheirimpactontheearth.Para.5Thedevelopmentofplantsandanimalsontheearth.,skimminglistentothetapeandmatch,themainideaofeachparagraph,10,7,3,8,4,9,6,1,5,2,12,11,1.Insectsandamphibiansappeared.3.Theearthbecameasolidball.5.Reptilesappeared.7.Theearthwasacloudofdust.9.Shellfishandotherfishappeared.11.Cleveranimalswithhandsandfeetappeared.,2.Dinosaursappeared.4.Smallplantsgrewonthewater.6.Plantsbegantogrowondryland.8.Waterappearedontheearth.10.TheuniversebeganwithaBigBang.12.Mammalsappeared.,scanning,readingfordetails,Readthetextandfillintheblanksinthefollowingform.,Atoms,stars,bodies,QuestionsforPar.1:,Whywastheearthdifferentfromotherplanets?Aitproducedalotofheat.B.Thewaterremained.CWaterdisappeared.D.Itwastheoldestplanet.,Whywaslifeabletodevelopontheearthbutnotonotherplanets?ATheearthhadasolidshape.B.Theearthdidnothaveharmfulgasesinitsatmosphere.CThewaterstayedontheearthbutnotonotherplanets.D.Theearthwasnottoohotandnottoocold.,QuestionsforPara.2,3:,2.water,7.Plantsinthewater,1.Shellfishandfish,8.Plantsonland,QuestionsforPara.4:readthepassageandgivetherighttimeline,3.Insectsandamphibians,4.Reptiles,5.Dinosaurs,6.Mammals,1,2,3,4,5,6,7,8,Manhadevolvedfromapes.,QuestionsforPara.4,Thehumanscameintobeingandspreadallovertheworld.,whatproblemdohumanbeingscause?,A.Theycauseglobalwarming.B.Theyexisteverywhereontheearth.C.Theyfindnewmethodsofgrowingcrops.D.Theyenjoyhuntingandfishing.,QuestionsforPara.5:,Summary,Afterthe“BigBang”,theearthwasjustacloudof_.It_loudlywithfireandrock,whichwereintimetoproduce_,nitrogen,watervapourandothergases.Thensmallplantsgrew.They_andfilledtheoceansandseaswith_,whichencouragedthelaterdevelopmentofearly_andallsortsoffish.Whentheplantsgrewintoforests,_appearedforthefirsttime.Theyproducedyounggenerallyby_eggs.,dust,exploded,carbon,multiplied,oxygen,Shellfish,reptiles,laying,Postreading,Whendinosaursdisappeared,_becamemoreimportant.Smallcleveranimalswith_appearedand_allovertheworld.Astimewentbytheycoveredtheearthandtheyareputtingtoomuchcarbondioxideintothe_,which_heat_escapingfromtheearthintospace.Whetherlifewillcontinueonearthformillionsofyearstocomewill_whetherthisproblemcanbesolved.,handsandfeet,dependon,from,prevent,atmosphere,spread,mammals,Summary,Discussion,Whatcanwedotodealwiththeproblemcausedbyhumanbeings,Youcanusethefollowingwordsandphrasesandsentencestohelpyou:,globalwarmingcarbondioxideatmospherepreventfromharmfulinturndependonasaresultthusWhatwecandoistoWhatwecantdoisto,solarenergy,planttrees,recyclerubbish