高中英语 必修三 unit4 reading 课件 19页

Unit4Astronomy:thescienceofthestars\nPara.1Para.2Para.3Para.4Para.5A________abouthowtheuniversewasformedThe__________oftheearthTheimportanceof______forlifeThe_______________ofplantsandanimalsThearrivalof_________andtheireffectsontheearththeoryformationwaterdevelopmenthumansHowlifebeganontheearthBeforelifeappeared.Differentlivesdeveloped.\nPart1(para1~3)BeforelifeappearedAccordingtoawidelyacceptedtheory,howdidthestarsform?Howdidtheearth’satmosphereform?Whywastheearthdifferentfromtheotherplanets?Whatarolethewaterplayedinthedevelopmentoflife?\n1.Accordingtoawidelyacceptedtheory,howdidthestarsform?2.Howdidtheearth’satmosphereform?Theuniversebeganwitha“BigBang”thatthrewmatterinalldirections,thenatomsbegantoformandcombinetocreatestars.Theearthwassoviolent.Itexplodedloudlywithforeandrocktoproducecarbon,nitrogen,watervaporandothergases,whichweretomaketheatmosphere.\n3.Whywastheearthdifferentfromtheotherplanets?4.Whatarolethewaterplayedinthedevelopmentoflife?Becausethewateronotherplanetshaddisappearedlater.Thepresenceofwaterallowedtheearthtodissolveharmfulgasesandacidsintotheoceansandseas.Thisproduceachainreactionwhichmadeitpossibleforlifetodevelop\nTheearthwasjustacloudofdustwhosefutureis_________afterthe“BigBang”.Thenthedustbegantosettleintoa_______ballwhichisso________and_______loudlywithfireandrock,tobeintimetoproducemanythings,whichmaketheearth’s___________.Astheearthcooleddown,________begantoappearandpeoplethinkitisimportantforthebeginningoflife.Itallowedtheearthtodissolve________gases.Thenlifebegantodevelop.uncertainsolidviolentexplodedatmospherewaterharmful︶︶︵Ifeltlonelyandlifewasdullatthattime.\nPart2(para4~5)Howthelifedeveloped1.Makeatimelineofthedevelopmentoflife2.Whydidtheplantsgrowbeforetheanimalscame?3.Whyisitwronginfilmsandstoriestoshowdinosaursandpeopletogether?\n1.2.3.4.5.6.smallplantsOnsurfaceofwaterEarlyshellfishandallsortsoffishgreenplantsonlandlandanimalsinsects(onland)amphibian(onlandandinwater)Mammals---cleveranimalsforestsreptiles(hugeanimal--dinosaurs)\n3.Whyisitwronginfilmsandstoriestoshowdinosaursandpeopletogether?2.Whydidtheplantsgrowbeforetheanimalscame?Becauseplantsprovideoxygenforanimalstobreathe.Becausedinosaursdiedoutlongbeforehumanbeingsdevelopedontheearth.\n︵︵︶Nobodyunderstoodplantswerethestartofchanges.They___________andfilledthefirstoceansandseaswithoxygen.Thisencouragedthe_____________ofearlyshellfishandfish.Landanimalssuchasinsects,amphibians,reptilesanddinosaursandsoon_________afterthefirstgreenplantsappeared.Dinosaursdisappeared,whichmadepossibletheriseof_____________ontheearth.Thensmallcleveranimals____________allovertheearth.multiplieddevelopmentspreadWithsomanyfriendsonme,Iwashappy.followedmammals\nHumansdevelopednew________ofgrowing,huntingandmovingaround.Astimewentbytheycoveredtheearth.Now_______carbondioxidehasbeenputtingintothe__________,which________heat_____escapingfromtheearthintospace.Asaresult,theproblemof______________occurs.Whetherlifewillcontinueontheearthformillionsofyearstocomewill___________whetherthisproblemcanbesolved.meansfrompreventsNow,I’mworriedaboutthefutureofmyselfandhumans…dependon︹toomuchatmosphereglobalwarming\nAccordingtothepictures,haveatrytoretellthedevelopmentoflife.\n\n\n\nSupposeyouweretheearth,whatwouldyouadvisehumanstodo?Writealettertothehumanbeing.\nPara11awidelyacceptedtheory2beginwith3inalldirectionsPara2Whatitwastobecomewasuncertainuntilbetween4.5and3.8billionyearsagowhenthedustsettledintoasolidglobe.Theearthbecamesoviolentthatitwasnotclearwhethertheshapewouldlastornot.Whatisevenmoreimportantisthatastheearthcooleddown,waterbegantoappearonitssurface.\nPara3Itwasnotimmediatelyobviousthatwaterwastobefundamentaltothedevelopmentoflife.Whatmanyscientistsbelieveisthatthecontinuedpresenceofwaterallowedtheearthtodissolveharmfulgasesandacidintotheoceansandseas.3makeitpossibleforlifetodevelopPara41onthesurfaceofthewater2filltheoceansandseaswithoxygen3liveonlandaswellasinthewater4produceyoungbylayingeggs5theageofthedinosaurs6remainamystery7.Thisdisappearancemadepossibletheriseofmammalsontheearth.\nPara51spread2.Theyareputtingtoomuchcarbondioxideintotheatmosphere,whichpreventsheatfromescapingfromtheearthintospace.3.Asaresultofthis,manyscientistsbelievetheearthmaybecometoohottoliveon.4.Whetherlifewillcontinueontheearthformillionsofyearstocomewilldependonwhetherthisproblemcanbesolved.