英语课件：人教版必修三Unit4SectionⅠ

Unit4Astronomy：thescienceofthestars,SectionWarmingUp&ReadingPreparing,预习多维感知,Section,预习多维感知,StepOne：AskandDiscussion1Doyouknowhowmanyplanetscirclearoundthesuninoursolarsystem?_答案：Venus(金星)；Earth(地球)；Mars(火星)；Mercury(水星)；Jupiter(木星)；Saturn(土星)；Uranus(天王星)；Neptune(海王星),2Eachreligionandculturehasitsownideasabouthowlifebeganonearth.Whatdoyouknow?_答案：InChina，weallknowthatPanguseparatestheskyfromtheearth.Inwesternculture，Godcreatedtheworldinsixdays.Manyscientistsbelievethattheuniversebeganwithahugeexplosioncalledthe“BigBang”,StepTwo：FastReadingScanthetextandthenchoosethebestansweraccordingtothetext.1Whatisthecorrectorderaccordingtothetext?Thecleveranimalswithhandsandfeetappearedandspreadallovertheearth.The“BigBang.”Smallplantsbegantoappearonthesurfaceofthewater.,65millionyearsago，theageofthedinosaursended.ABCD答案：D,2Howdidtheatmosphereontheearthappear?AItcamefromspace.BItcamefromtheexplosion.CItcamefromtheoceans.DItcamefromtheforests.答案：B,3Inoursolarsystem，whydoeslifeonlyexistontheearth?ABecauseitisverywarmontheearth.BBecauseitiscoolenoughontheearth.CBecausethereisplentyofwaterontheearth.DBecauseitisbigenough.答案：C,4Whydidplantsappearearlierthananimals?ABecauseplantscouldproduceoxygen，whichwasimportantforanimals.BBecauseplantsweremoreadvancedthananimals.CBecauseanimalsneededmorewater.DBecauseplantsneededmorewater.答案：A,5Accordingtothepassagewecanknow_.AonlytheearthhaslifeonitinspaceBoxygenintheatmosphereontheearthcamefromthe“BigBang”ChumansarethecleverestanimalsoftheearthDplantsplayedanimportantpartintheappearanceofanimals答案：D,StepThree：CarefulReading1Readthetextcarefullyandthenanswerthefollowingquestions.(1)Whywastheearthdifferentfromotherplanets?_答案：Becausethewaterremainedontheearth.,(2)Whydidtheplantsgrowbeforetheanimalscame?_答案：Becauseplantsprovidedoxygenforanimalstobreathe.(3)Whyisitwronginfilmsandstoriestoshowdinosaursandpeopletogether?_答案：Becausedinosaursdiedoutlongbeforehumanbeingsdevelopedontheearth.,2Readthetextandmatcheachparagraphwithitsmainidea.Paragraph1()A.Howhumansappearedandwhateffectstheyhavecausedtotheearth.Paragraph2()B.Waterisveryimportantforlifeontheearth.Paragraph3()C.Howtheearthformed.Paragraph4()D.Howtheplantsandanimalsontheearthdeveloped.,Paragraph5()E.Itiswidelyacceptedthattheuniversebeganwitha“BigBang”答案：ECBDA3Readthetextandwritedownthemainideaofit.Thetextmainlytellsusthe_oftheearthandthe_oflifeonit.答案：formation；development,StepFour：SummaryReadthetextcarefullyandfillintheblanks.Theearthwasjustacloudof1._afterthe“BigBang”Theearth2._loudlywithfireandrock.Theywerein3._toproducemanythings，whichweretomaketheearthsatmosphere.Astheearthcooleddown，waterbegantoappearonitssurface.Itallowedtheearthtodissolve4._gases.Thenlifebegantodevelop.,Thefirstsmallplants5._andfilledtheoceansandseaswithoxygen.Thisencouragedthe6._ofearlyshellfishandfish.Landanimalssuchasinsects，reptilesanddinosaursandsoonappearedaftergreenplantsappeared.Smallcleveranimals7._allovertheearth.Theyareputtingtoo8._carbondioxideintotheatmosphere，which9._heatfromtheearthintospace.,Whetherlifewillcontinueontheearthformillionsofyearstocomewill10._onwhetherthisproblemcanbesolved.答案：1.dust2.exploded3.time4.harmful5.multiplied6.development7.spread8.much9.p