Unit4Reading（Howlifebeganontheearth）导学案- 高中英语人教新课标必修三

PAGEPAGE3M2U4Warmingup--Reading:HowLifeBeganOnTheEarth学案内容课前预习:Pleaseturnto27,andfinishthefollowingtasks.自主学习:I.Lead-in&.Pre-readingFreetalk（Don`tbeshy大胆说出口！）(查阅下列词汇,并正确读出来)Mercury,Venus,Mars,Jupiter,Saturn,Uranus,Neptune,theory,atoms,billlion,globe,carbondioxide,atmosphere,fundamental,acids,chain,oxygen,amphibians,reptiles,dinosaurs,mammalsII.While-Reading(p26)（阅读文章完成下列任务）FastReading:Task1:(回答以下问题)1.Thepassageisdevelopedby()A.timeB.placeC.space2.Thetextmainlytellsusthe________oftheearthandthe__________oflifeonit.Task2:Matching（匹配每个段落大意）Para.1A.Theformationoftheearth.Para.2B.Theimportanceofwaterforlife.Para.3C.Awidelyacceptedtheoryabouttheformationoftheuniverse.Para.4D.Thearrivalofhumansandtheirimpactontheearth.Para.5E.Thedevelopmentofplantsandanimalsontheearth.把课文分成俩部分该怎么分？Part1:Part2:Task3:Supportingdetails.1.Whatbegantoappearontheearth’ssurfacewhenitcooleddown?A.Water.B.Gases.C.Heat.D.Carbon.2.Howdidtheatmosphereontheearthappear?A.Itcamefromspace.B.Itcamefromtheexplosion.C.Itcamefromtheoceans.D.Itcamefromtheforests.3.Whywastheearthdifferentfromotherplanets?A.Itproducedalotofheat.B.Thewaterremained.C.Waterdisappeared.D.Itwastheoldestplanet.4.Whywasitnecessaryforplantstogrowbeforeanimals?A.Animalsneededplantstoprotectthemfromthesun.B.Plantsprovidedoxygenforanimalstobreathe.C.Animalscouldhidefromhuntersintheforest.D.Itwaseasierforplantstogrow.5.Accordingtothepassagewecanknow____A.onlytheearthhaslifeonitinspaceB.oxygenistheatmosphereontheearthcamefromthe“BigBang”C.humansarethecleverestanimalsontheearthD.plantsplayedanimportantpartintheappearanceoftheanimalsCarefulReading:Task1:Readpara1-3andfillintheblanks.(3mins)Howdidtheearthcomeintobeing(产生)?BigBang→acloudof①→asolid②→explodedloudlywith③and④→theearth`s⑤→theearth⑥→waterTask2:Readpart2andfinishtheflowchart.(3mins)Small⑦inwater→⑧andallsortsoffish→greenplantson⑨→⑩onlandandamphibians→Forests→⑾,dinosaurs,⑿,smallcleveranimals.Groupwork:Workwithyourgroupmatesandputtheeventsintoatimeline.(和队友根据时间线排序)(3mins)1.Insectsandamphibiansappeared.2.Dinosaursappeared.3.Theearthbecameasolidball.4.Smallplantsgrewonthewater.5.Reptilesappeared.6.Plantsbegantogrowondryland.7.Theearthwasacloudofdust.8.Waterappearedontheearth.9.Shellfishandotherfishappeared.10.Theuniversebeganwitha“BigBang”.11.Cleveranimalswithhandsandfeetappeared.12.Mammalsappeared.SummaryTheearthwasjust1._____cloudofdustafterthe“BigBang”.Theearthexplodedloudlywithfireandrock.Theywere2._____timetoproducemanythings,whichweretomaketheearth'satmosphere.Astheearthcooleddown,waterbegantoappearonitssurface.Itallowedtheearth3___________(dissolve)4._______(harm)gases.Thenlifebegantodevelop.Thefirstsmallplantsmultipliedandfilledtheoceansandseaswithoxygen.Thisencouragedthe5._____________(develop)ofearlyshellfishandfish.Landanimalssuchasinsects,reptilesanddinosaursappearedaftergreenplants6._________(appear).Smallcleveranimalsspreadallovertheearth.Theyareputtingtoomuchcarbondioxideintotheatmosphere,7.______preventsheatfrom8.__________(escape)fromtheearthintospace.9.__________lifewillcontinueontheearthformillionsofyearstocomewilldependonwhetherthisproblemcan10.__________(solve)Post-Reading:Whatproblemiscausedbyhumanbeings?(Lastparagraph）Discuss:Whatcanwedotoprotecttheearthandmakeitabetterplacetoliveon?(5个为一组，选取组长上台做个小报告)线索：solarenergy,air,land,forest,transportation,waterV.Conclusion.Onlyifwecarewillwehelp;only