人教版+高中英语课件+Book3+ unit1+Warming up and Reading.ppt

Astronomy:thescienceofthestars,Unit4,Warmingupandreading,Howmuchdoyouknowabouttheuniverse?,Whatarethenamesoftheeightplanetsthatcirclethesun?Whatistheirorderfromthesun?,地球_木星_火星_水星_,海王星_土星_天王星_金星_,Earth,Jupiter,Mars,Mercury,Neptune,Saturn,Uranus,Venus,Astronomyisoneoftheoldestsciences.Itisthescientificstudyofcelestialobjects(suchasstars,planets,comets,nebul,starclustersandgalaxies)andphenomenathatoriginateoutsidetheEarthsatmosphere(suchasthecosmicbackgroundradiation).Itisconcernedwiththeevolution,physics,chemistry,meteorology,andmotionofcelestialobjects,aswellastheformationanddevelopmentoftheuniverse.Astronomyisamultidisciplinarysubjectandusesknowledgefrombothmathandphysics.,1.Howoldistheuniverse?2.Howoldistheearth?3.Whichwerethefirstcreatureorplantsonearth?4.Doyouknowwhattheorderforthedevelopmentofplantsandanimalsis?,Severalbillionyearsago.,Between4.5and3.8millionyearsago.,Verysmallair-breathingcreatures.,FreeTalk,Eachreligionorculturehasitsownideasaboutthebeginningoftheuniverse.Whatdoyouknow?,Godcreatedtheuniverse.,PanKuseparatedheavenandearth.,Fastreading,Readthepassagequicklyandfindthemainidea.,Abriefintroductiononhowtheuniversedevelopedandhowlifebeganontheearth.,Carefulreading,Para1:,Para2:Para3:Para4:,Para5:,Awidelyacceptedtheoryabouttheformationoftheuniverse.,Theformationoftheearth.,Theimportanceofwaterforlife.,Thedevelopmentofplantsandanimalsontheearth.,Thearrivalofhumansandtheirimpactontheearth.,Readthepassagecarefullyandanalyseitsstructure.,earth,atmosphereandwater,lifedevelopment,humanbeings,1.Whatistheoriginalearthsatmospheremadeupof?2.Whydidscientistsbelievewaterisfundamentaltothedevelopmentoflife?3.Howdidwatercomeintobeingontheearth?4.Whichkindoflife-beingfirstappearedontheearth,plantsoranimals?Why?5.Whyweremammalsdifferentfromalllifeformsinthepast?,Answerthefollowingquestions.,Carbon,nitrogen,watervapour,andothergases.,2.Whydidscientistbelievewaterisfundamentaltothedevelopmentoflife?,Becausewaterallowedtheearthtodissolveharmfulgasesandacidsintotheoceansandseastoensureafollowingchainreaction,whichmadeitpossibleforlifetodevelop.,Whatistheoriginalearthsatmospheremadeupof?,3.Howdidwatercomeintobeingontheearth?,Theexplosionoftheearthproducedwatervapor,whichturnedintowaterwhentheearthcooleddown.,4.Whichkindoflife-beingfirstappearedontheearth,plantsoranimals?Why?,Atfirst,smallplantsbegantoappearonthesurfaceofthewater,theyproducedoxygen,whichencouragedthelaterdevelopmentofearlyshellfishandallsortsoffish.,5.Whyweremammalsdifferentfromalllifeformsinthepast?,Theyweredifferentbecausetheyproducedtheiryoungfromwithintheirbodiesandproducemilktofeedthem.,Postreading,Discussthefollowingquestions.,1.Whywastheearthdifferentfromtheotherplanets?,3.Whyisitwrongtoshowfilmswithdinosaursandpeopletogether?,2.Whydidtheplantsgrowbeforetheanimalscame?,Becausethewaterremainedontheearth.,Becausedinosaursdiedoutlongbeforehumanbeingsdevelopedontheearth.,Becauseplantsprovidedoxygenforanimalstobreathe.,4.Thereusedtobenineplanetsinthesolarsystem.Recentlyscientistshavedecidedthatoneofthemcannolongerbeconsideredaplanet.Doyouknowthenameofit?Doyouknowwhytheyremovedit?,5.Whatproblemiscausedbyhumanbeings?,ItsnameisPluto.Scientistsnowthinkitistoosmalltobecalledaplanet.,Globalwarming.,CanyoufindtheirEnglishinthereading?1.随后它会变成什么一直无法确定,直到约45亿至38亿年,这团尘埃最终变成一个固体圆球。2.地球变得如此激烈动荡,以致于不知道这个形状是否会继续存在下去。3.更重要的事，随着地球的冷却，地球的表面就开始出现了水。4.很多科学家相信,水的继续存在使地球得以把有害气体和酸的物质溶解到海洋里。,Letsreviewtheevolutionoflifeontheearth.,Afterthe“BigBang”,theearthwasfullofwater.,Originalcellsappearedintheocean.,Thecellsinthewaterbegantoseparate.Marineanimalscameintobeing.,Someanimals(amphibianonly