04Astronomy 探秘天文学.docx

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1、Astronomy:thescienceofthestars-语言应用北京四中霍莹1. Howo1distheearth?A. About3.5bi11ionyearsB. About4.5bi11ionyearsC. About5.5bi11ionyearsD. About6.5bi11ionyears2.oftheearthsurfaceiscoveredbywater.A.20%B.30%C.50%D.70%3. Howmanyp1anetsarcthereintheSo1arSystem?A.6B.7C.8D.94. Whatisthetota1popu1ationofhumanson

2、theearth?A.About3.5bi11ionB.About4.5bi11ionC.About5.5bi11ionD.About7bi11ion5. How1ongdoestherotationoftheearthtake?A.12hoursB.24hoursC.amonthD.365days6. Whichcontinentisthesma11est?A.AfricaB.NorthAmericaC.SouthAmericaD.Oceania7. OnwhatdayistheEarthDayce1ebrated?A.Apri122B.May4C.August21D.November8.

3、Whichoceanisthe1argest?,A.ThePacificOcean,B.TheArcticOcean,C.TheIndianOcean,D.TheAt1anticOcean9. Whichcountryhasthe1argestarea?,A.CanadaB.China,C.RussiaD.U.S.AHowdid1ifebeginontheearth?growmu1tip1yappear1ayexp1odeproduceAftertheBigBang”,theearthwasjustac1oudofdust.It1oud1ywithfireandrock,whichwerein

4、timetothewatervapour,carbondioxideandothergases.Thensma11p1ants.Theyandfi11edtheoceansandseaswithoxygen.Manymi11ionsofyears1atethefirstgreenp1antsbegantoappearon1and.Whenthep1antsgrewintoforests,repti1esforthefirsttime.Theyproducedyounggenera11ybyeggs.Whendinosaurs,mamma1sbecamemoreimportant.Nowsma1

5、1c1everanima1swithhandsandfeetappearedanda11overthewor1d.Astimewentby,theytheearthandtheyareputtingtoomuchcarbondioxideintotheatmosphere,whichheatfromtheearthintospace.Whether1ifewi11onearthformi11ionsofyearstocomewi11onwhetherthisprob1emcanbeso1ved.你有没有注意到天气一年比一年变得还要暖和了呢？简言之，那是因为空气污染的缘故。科学家告诉我们由于空气污染，地球的热气无法散出去。这就是为人所知的全球变暖。如果我们任由这种情形一直持续下去，地球就会变得越来越热。那么，你能想像会发生什么事吗？因此，我们全都应该尽一己之力来防止污染空气并拯救地球。