Astronomy:thescienceofthestars

整理pptTheuniverseismadeupofstars,planets,andothermatterscatteredthroughoutspace.整理ppt

TheMilkyWayisalargespiralgalaxy（螺旋星系）

measuringabout100,000light-yearsacross.Itisabout14billionyearsoldandtakes225millionyearsorsotorotate（旋轉(zhuǎn)）

once.Likeallspirals,itcontainsplentyofgasanddust,fromwhichnewstarsareformed.Thedensenucleus（核心）

istheoldestpartandhasnogasleftfornewstar.整理pptTheSolarsystem1.Mercury(水星)4.Mars（火星）7.Uranus（天王星）2.Venus(金星)5.Jupiter（木星）8.Neptune（海王星）3.Earth(地球)6.Saturn（土星）9.Pluto（冥王星）整理pptOursolarsystemismadeupofthesunandtheobjectsthatorbitit.Theseincludethenineplanets(andprobablymorethannine)andtheirmoons,aswellasasteroids（小行星）,comets,andmeteors（流星）.

Thesunistheneareststartotheearth.Itisaglobeofhotgas,mostlyhydrogen（.氫）,andliesatthecenterofoursolarsystem.Itcontainsnosolidmaterial.Starsarelargeballsofhotgasthatproducelightandheatthroughnuclearreactions.OurSunisanaverageyellowstar,butseemsbrightbecauseitissoclose.

MercuryTheRomangodofmerchantsandtravellers

Venus

TheRomangoddessoflove

Mars

TheRomangodofwar

JupiterThekingoftheRomangods

SaturnTheRomangodofseedsandsowing

UranusTheGreekgodofthesky

NeptuneTheRomangodofthesea

PlutoTheRomangodofthedead整理pptStarsarelargeballsofhotgasthatproducelightandheatthroughnuclearreactions.OurSunisanaverageyellowstar,butseemsbrightbecauseitissoclose.

Planetsarethelargestobjectsthatcirclearoundthestars.Theymayberocky,liketheearth,ormademostlyofgasandliquid,likeJupiter.ThewordplanetisGreekfor"wanderer."Thenamecomesfromthewayplanetsappeartomoveagainstthestarsovertime.Itisthoughtthattheplanetsformedataboutthesametimeasthesun.Astheoriginalcloudofgasanddustcollapsedtoforthesun,somematterwasspunoutintoaflatteneddisk.Overseveralmillionyears,thedustandgasgatheredtogethertoformtheplanetsandmoons.Denserrocksgatherednearthesunandlightergasesfartherout.整理pptOurplanet,theearth,

isalargeballofrocksandmetalscoveredwithwaterandsoil.Itbelongstoagroupofnineplanetsthatmovearoundastarcalledthesun.Itissurroundedbyablanketofgasescalledtheatmosphere,hasonemoon,andasfarasweknow,istheonlyplanetthatsupportslife.整理pptNASA’sMarsdetector（探測器）,Opportunity,succeededinfindingsignsthatwateronceexistedontheplanet.OpportunitylandedonMarsinJanuary.Scientistsnowbelievethattheplanetcouldoncehavesupportedlife.“Althoughwestillcan’tsaythatlifecouldhaveexistedinthisenvironment,itisnowcertainthattherewaswateronMars,”saidoneofthescientistsworkingontheMarsmission.（任務(wù)）整理pptHowLifeBeganontheEarth整理pptDiscussion:1.Lifeisamysterytoourbeings.Scientistsstudytheoriginoflifebyexplodingspace.Doyoureallythinkspacefightsaremeaningful?Discusstheadvantagesanddisadvantagesofspaceflights.2.Whyistheearththeonlyoneofalltheplanetsonwhichlifecansurvive?Haslifestartedinotherstarsexceptontheearth?整理pptRead“HowLifeBeganontheEarth”,thenanswerthefollowingquestions:

1.

What’sthemainideaofthetext?

2.

Howmanypartscanthetextbedividedinto?What’sthemainideaforeachpart?

Twoparts:Part1(para1):Watermadeitpossibleforlifetobegintodevelop.Part2(para2,3,4):Thedevelopmentoflivingthings.Mainidea:Howlifebeginontheearth整理pptReadPart1andanswerquestions:1.Howdidwatercomeintobeingontheearth?2.What’sthesignificanceofthepresenceofwaterontheearth?Itallowedtheearthtodissolveharmfulgasesintooceansandseas.Theexplosionoftheearthproducedwatervapour,whichturnintowaterwhentheearthcooleddown.整理pptReadPart2andanswerquestions:1.Whyweremammalsdifferentfromdinosaurs?Becausetheyproducetheiryoungfromwithintheirbodies.2.Fillinthediagram:

Smallplantsinwater1

2

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2.shellfishandallsortsoffish3.Greenplantsonland4.insects(onland)5.amphibianonlandinwater6.forests7.reptilesonland8.Dinosaursonland9.mammalsonland整理pptRead“HowLifeBeganontheEarth”,fillinthediagramoflife’soriginsandprocess:Harmfulgases1.PlantsintheseasLandplants2.InsectsAmphibiansReptilesDinosaursMammalsincluding3_____________Thehumanbeingswaterlandanimals整理ppt1.TheBigBangisthetermusedtodescribeahugeexplosionthatscientistsbelievehappenedaround15billionyearsago,creatingouruniverse.NobodyknowswhatcausedtheBigBang,sincewecannotlookbacktoatimebeforeit.Butjustaftertheevent,theuniverseisbelievedtohavebeenaknotoftightlypackedparticlesonlyaboutthesizeofapea.Itstemperaturewastenthousandtrillion,trilliondegreeCelsius.整理pptHomework:discussion:1.Whyisthepresenceofplantsimportantforthedevelopmentoflife?2.Istheearthgettingwarmereachyear?Ifso,whateffectswillthishave?What’sthe“greenhouseeffect,”whichsomescientistssaymightdestroyourplant?Willtheburningofcoal,oil,andnaturalgascausetheearthtobecomeadeadplanetlikeVenus?整理ppt整理ppt9、靜夜四無鄰，荒居舊業(yè)貧。。2023/1/12023/1/1Sunday,January1,202310、雨中黃葉樹，燈下白頭人。。2023/1/12023/1/12023/1/11/1/20237:23:52PM11、以我獨(dú)沈久，愧君相見頻。。2023/1/12023/1/12023/1/1Jan-2301-Jan-2312、故人江海別，幾度隔山川。。2023/1/12023/1/12023/1/1Sunday,January1,202313、乍見翻疑夢，相悲各問年。。2023/1/12023/1/12023/1/12023/1/11/1/202314、他鄉(xiāng)生白發(fā)，舊國見青山。。01一月20232023/1/12023/1/12023/1/115、比不了得就不比，得不到的就不要。。。一月232023/1/12023/1/12023/1/11/1/202316、行動出成果，工作出財(cái)富。。2023/1/12023/1/101January202317、做前，能夠環(huán)視四周；做時(shí)，你只能或者最好沿著以腳為起點(diǎn)的射線向前。。2023/1/12023/1/12023/1/12023/1/19、沒有失敗，只有暫時(shí)停止成功！。2023/1/12023/1/1Sunday,January1,202310、很多事情努力了未必有結(jié)果，但是不努力卻什么改變也沒有。。2023/1/12023/1/12023/1/11/1/20237:23:52PM11、成功就是日復(fù)一日那一點(diǎn)點(diǎn)小小努力的積累。。2023/1/12023/1/12023/1/1Jan-2301-Jan-2312、世間成事，不求其絕對圓滿，留一份不足，可得無限完美。。2023/1/12023/1/12023/1/1Sunday,January1,202313、不知香積寺，數(shù)里入云峰。。2023/1/12023/1/12023/1/12023/1/11/1/202314、意志堅(jiān)強(qiáng)的人能把世界放在手中像泥塊一樣任意揉捏。01一月20232023/1/12023/1/12023/1/115、楚塞三湘接，荊門九派通。。。一月232023/1/12023/1/12023/1/11/1/202316、少年十五二十時(shí)，步行奪得胡馬騎。。2023/1/12023/1/101January202317、空山新雨后，天氣晚來秋。。2023/1/12023/1/12023/1/12023/1/19、楊柳