高中英语-必修三-unit4-reading-课件

Unit4Astronomy:thescienceofthestarsPara.1Para.2Para.3Para.4Para.5A________abouthowtheuniversewasformedThe__________oftheearthTheimportanceof______forlifeThe_______________ofplantsandanimalsThearrivalof_________andtheireffectsontheearththeoryformationwaterdevelopmenthumansHowlifebeganontheearthBeforelifeappeared.Differentlivesdeveloped.Part1(para1~3)Beforelifeappeared•Accordingtoawidelyacceptedtheory,howdidthestarsform?•Howdidtheearth’satmosphereform?•Whywastheearthdifferentfromtheotherplanets?•Whatarolethewaterplayedinthedevelopmentoflife?1.Accordingtoawidelyacceptedtheory,howdidthestarsform?2.Howdidtheearth’satmosphereform?Theuniversebeganwitha“BigBang”thatthrewmatterinalldirections,thenatomsbegantoformandcombinetocreatestars.Theearthwassoviolent.Itexplodedloudlywithforeandrocktoproducecarbon,nitrogen,watervaporandothergases,whichweretomaketheatmosphere.3.Whywastheearthdifferentfromtheotherplanets?4.Whatarolethewaterplayedinthedevelopmentoflife?Becausethewateronotherplanetshaddisappearedlater.Thepresenceofwaterallowedtheearthtodissolveharmfulgasesandacidsintotheoceansandseas.ThisproduceachainreactionwhichmadeitpossibleforlifetodevelopTheearthwasjustacloudofdustwhosefutureis_________afterthe“BigBang”.Thenthedustbegantosettleintoa_______ballwhichisso________and_______loudlywithfireandrock,tobeintimetoproducemanythings,whichmaketheearth’s___________.Astheearthcooleddown,________begantoappearandpeoplethinkitisimportantforthebeginningoflife.Itallowedtheearthtodissolve________gases.Thenlifebegantodevelop.uncertainsolidviolentexplodedatmospherewaterharmful︶︶︵Ifeltlonelyandlifewasdullatthattime.Part2(para4~5)Howthelifedeveloped1.Makeatimelineofthedevelopmentoflife2.Whydidtheplantsgrowbeforetheanimalscame?3.Whyisitwronginfilmsandstoriestoshowdinosaursandpeopletogether?1.2.3.4.5.6.smallplantsOnsurfaceofwaterEarlyshellfishandallsortsoffishgreenplantsonlandlandanimalsinsects(onland)amphibian(onlandandinwater)Mammals---cleveranimalsforestsreptiles(hugeanimal--dinosaurs)3.Whyisitwronginfilmsandstoriestoshowdinosaursandpeopletogether?2.Whydidtheplantsgrowbeforetheanimalscame?Becauseplantsprovideoxygenforanimalstobreathe.Becausedinosaursdiedoutlongbeforehumanbeingsdevelopedontheearth.︵︵︶Nobodyunderstoodplantswerethestartofchanges.They___________andfilledthefirstoceansandseaswithoxygen.Thisencouragedthe_____________ofearlyshellfishandfish.Landanimalssuchasinsects,amphibians,reptilesanddinosaursandsoon_________afterthefirstgreenplantsappeared.Dinosaursdisappeared,whichmadepossibletheriseof_____________ontheearth.Thensmallcleveranimals____________allovertheearth.multiplieddevelopmentspreadWithsomanyfriendsonme,Iwashappy.followedmammalsHumansdevelopednew________ofgrowing,huntingandmovingaround.Astimewentbytheycoveredtheearth.Now_______carbondioxidehasbeenputtingintothe__________,which________heat_____escapingfromtheearthintospace.Asaresult,theproblemof______________occurs.Whetherlifewillcontinueontheearthformillionsofyearstocomewill___________whetherthisproblemcanbesolved.meansfrompreventsNow,I’mworriedaboutthefutureofmyselfandhumans…dependon︹toomuchatmosphereglobalwarmingAccordingtothepictures,haveatrytoretellthedevelopmentoflife.Supposeyouweretheearth,whatwouldyouadvisehumanstodo?Writealettertothehumanbeing.Para11awidelyacceptedtheory2beginwith3inalldirectionsPara21.Whatitwastobecomewasuncertainuntilbetween4.5and3.8billionyearsagowhenthedustsettledintoasolidglobe.2.Theearthbecamesoviolentthatitwasnotclearwhethertheshapewouldlastornot.3.Whatisevenmoreimportantisthatastheearthcooleddown,waterbegantoappearonitssurface.Para31.Itwasnotimmediatelyobviousthatwaterwastobefundamentaltothedevelopmentoflife.2.Whatmanyscientistsbelieveisthatthecontinuedpresenceofwaterallowedtheearthtodissolveharmfulgasesandacidintotheoceansandseas.3makeitpossibleforlifetodevelopPara41onthesurfaceofthewater2filltheoceansandseaswithoxygen3liveonlandaswellasinthewater4produceyoungbylayingeggs5theageofthedinosaurs6remainamystery7.Thisdisappearancemadepossibletheriseofmammalsontheearth.Para51spread2.Theyareputtingtoomuchcarbondioxideintotheatmosphere,whichpreventsheatfromescapingfromtheearthintospace.3.Asaresultofthis,manyscientistsbelievetheearthmaybecometoohottoliveon.4.Whetherlifewillcontinueontheearthformillionsofyearstocomewilldependonwhetherthisproblemcanbesolved.