2021年高中英语人教版必修3《Unit 4 Astronomy the science of the stars》教学

人教版高中英语Unit4Astronomy:thescienceofthestarsStep1LeadinTheBigBangThedevelopmentoflifeAcloudofdustAsolidglobeExplodeatmospherewaterCellsseparatePlantsinthewaterEarlyshellfishandfishPlantsonlandoxygenInsectsandamphibiansReptilesDinosaursMammalsManhadevolvedfromapes.Forthefirsttime,thechinesegointotheouterspaceTheSolarsystemStep2WarmingupDoyouknowhowmanyplanetscirclearoundthesuninoursolarsystem?Whatarethey?Canyoumatchthenameswiththeplanets?JupiterUranusNeptuneSaturnMercuryMarsEarthVenus水星金星地球火星木星土星天王星海王星AblackholeStep3Pre-readingEachreligionandculturehasitsownideasabouthowlifebeganonearth.Whatdoyouknow?InChina,weallknowthatPanGuseparatestheskyfromtheearth.TheGoddessNvwamendedtheheavenandcreatedhumanbeings.上帝造人Inwesternculture,Godcreatedtheworldinsixdays.Whatisthepassageabout?Step4ReadingTask1.ScanningReadingskill:Readthepassagequicklyandmatchthemainideaforeachparagraph.Don’tworryaboutthelanguage.TheimportanceofwaterforlifeThedevelopmentofplantsandanimalsontheearthTheformationoftheearthd.Awidelyacceptedtheoryabouttheformationoftheuniversedcabe.ThearrivalofhumansandtheirimpactontheearthParagraph5:Paragrap1:Paragrap2:Paragrap3:Paragrap4:eReadingskill:Gothroughthetextforspecificinformation.Don’treadsentencebysentence.Puttheorderofdevelopmentoflifeintoatimeline.Insectsandamphibiansappeared.Theearthbecameasolidball.Reptilesappeared.Theearthwasacloudofdust.ShellfishandotherfishappearedDinosaursappeared.Smallplantsgrewonthewater.Plantsbegantogrowondryland.Waterappearedontheearth.Mammals(includinghumans)appeared.DBIGEHACFJAblackholeThinkaboutwhatyouhavereadandmakechoices.1.Whywastheearthdifferentfromotherplanets?2.Whywaslifeabletodevelopontheearthbutnotonotherplanets?3.Whydidtheplantsgrowbeforeanimalscame?4.Whatproblemiscausedbyhumanbeings?Whywastheearthdifferentfromotherplanets?AItproducedalotofheat.B.Thewaterremained.CWaterdisappeared.D.Itwastheoldestplanet.Whywaslifeabletodevelopontheearthbutnotonotherplanets?ATheearthhadasolidshape.B.Theearthdidnothaveharmfulgasesinitsatmosphere.CThewaterstayedontheearthbutnotonotherplanets.D.Theearthwasnottoohotandnottoocold.Whydidtheplantsgrowbeforeanimalscame?AAnimalsneededplantstoprotectthemfromthesun.BPlantsprovidedoxygenforanimalstobreathe.CAnimalscouldhidefromhuntersinforest.DItwaseasierforplantstogrow.Whatproblemiscausedbyhumanbeings?ATheyexisteverywhereontheearth.BTheycauseglobalwarming.CTheyfindnewmethodsofgrowingcrops.DTheyenjoyhuntingandfishing.ks5u精品课件AcloudofdustCombineintoasolidballExplode…withfire&rock(produceH2O,CO2,O2,N2,othergases)atmosphereCooldownwaterappeareddissolveharmfulgasesinto…LifebeganLifedevelopedThedevelopmentoflifesmallplantsgrowonthewaterappearshellfish&otherfishplantsbegintogrowondrylandinsectsandamphibiansappearrdinosaursappearmammalsappear→→→→→reptilesAsastudent,whatlittlethingscanwedofortheearth?topreventtheearthfromgettinghotterandhottertoslowdowntheproblemgettingworse……early_________andallsortsoffishhugeanimals(dinosaurs)theriseof__________shellfishmammalsWhetherlifewillcontinueontheearthdependsonhumanbeings.Onlyifwecarewillwehelp,onlyifwehelpshallallbesaved!Step5Homework1.Readaloudthereadingpassageandunderlinetheusefulphrasesandsentencepatterns.2.FinishoffEx1andEx2onP.28.Readthetextcarefullyandfillintheblanksinthefollowingform.TimeWhathappenedBigBang______begantoformandcombinetocreatestarsandotherbodies.AtomsBetween4.5and3.8billionyearsago●Dustsettledintoasolidand______globe.●Theearthexplodedtoproduceits___________.●Thecontinued________ofwaterallowedtheearthtodissolveharmfulgasesand_____intotheoceansandseas.violentatmospherepresenceacidsManymillionsofyearslater●Thefirstsmallplantsonthesurfaceofthewaterproduced_______.●Early_______andallsortsoffishappeared.●Greenplantsbegantogrowonland.●Insectsand___________appeared.oxygenshellfishamphibiansManymillionsofyearslater●________appearedandtheylaideggs.●Dinosaursdeveloped,laideggsand_______formorethan140millionyears.●Mammalsroseand____________babies.ReptilesexistedgavebirthtoAbout2.6millionyearsago●Somesmall______animalswithhandsandfeetappearedandspreadallovertheearth.NowHumansproducetoomuchcarbon_______,makingtheearthtoohot.cleverdioxide1073849615212111.Insectsandamphibiansappeared.3.Theearthbecameasolidball.5.Reptilesappeared.7.Theearthwasacloudofdust.9.Shellfishandotherfishappeared.11.Cleveranimalswithhandsandfeetappeared.2.Dinosaursappeared.4.Smallplantsgrewonthewater.6.Plantsbegantogrowondryland.8.Waterappearedontheearth.10.Theuniversebeganwitha"BigBang".12.Mammalsappeared.early_________andallsortsoffishgreenplantsonlandlandanimalsinsectsamphibians___________hugeanimals(dinosaurs)theriseof__________humanbeingsshellfishreptilesmammalsHowlifebeganonearthisoneofthebiggestpuzzlesthatscientistsfoundhardtosolve.Whatotherpuzzlesarehiddeninthepassage?Findthemoutanddosomeresearch.Howlifebeganontheearth“BigBang”otherbodies________starsEarth:acloudof_____atomsdustSummaryasolid_____theearth’s_____________other4._____Water:____________tothedevelopmentoflifewatervapournitrogencarbonextremelysmall_______onthesurfaceofthewaterglobegasesatmospherefundamentalplantsTheimportanceofwaterforlifeThedevelopmentofplantsandanimalsontheearthTheformationoftheearthd.Awidelyacceptedtheoryabouttheformationoftheuniversedcabe.ThearrivalofhumansandtheirimpactontheearthParagraph5:Paragrap1:Paragrap2:Paragrap3:Paragrap4:eStep5SummingupHowlifebeganontheearth1.smallplantsinwater2.shellfishandallsortsoffish3.greenplantsonland4.Insects(onland)5.amphibians(onlandandinwater)6.forests7.Reptiles(onland)8.Dinosaurs(onland)9.Mammals(onland)10.smallcleveranimalswithhandsandfeet11.humans1.Whywastheearthdifferentfromtheotherplanets?Becausewaterremainedontheearth.2.Whydidtheplantsgrowbeforetheanimalscame?Becauseplantsprovidedoxygenforanimalstobreathe.Zxxk3.Whyisitwrongtoshowfilmswithdinosaursandpeopletogether?Becausedinosaursdiedoutlongbeforehumanbeingsdevelopedontheearth.4.Thereusedtobenineplanetsinthesolarsystem.Recentlyscientistshavedecidedthatoneofthemcannolongerbeconsideredaplanet.Doyouknowthenameofthatplanet?ZxxkDoyouknowwhytheyremovedit?ThenameisPluto.Scientistsnowthinkitistoosmalltobecalledaplanet.5.Whatproblemiscausedbyhumanbeings?Humanbeingscauseglobalwarming.Whatisthepassageabout?Step4ReadingHowlifebeganontheearth.While-readingReadthepassagequicklyandmatchthemainideaforeachparagraph.Step1LeadinLookattwopictures,trytogiveasmuchinformationaspossible.Step2WarmingupDoyouknowhowmanyplanetscirclearoundthesuninoursolarsystem?Whatarethey?Canyoumatchthenameswiththeplanets?While-readingThinkaboutwhatyouhavereadandmakechoices.海王星Neptune水星Mercury金星Venus地球Earth火星Mars木星Jupiter土星Saturn天王星UranusReadingHowlifebeganontheearth?Workinpairs.Puttheorderofdevelopmentoflifeintoatimelinefirstaccordingtoyourcommonsense,andthenaccordingtothereadingpassage.ScanningSkimmingI.Readthepassagequicklyandmatchthemainideawitheachparagraph.zxxkWorkinpairs.Puttheorderofdevelopmentoflifeintoatimelineaccordingtothereadingpassage.forspecificinformation.Don’treadsentencebysentence.onthewater→shellfish&otherfish→plantsbegintogrowondryland→insectsandamphibiansappear→retilesappear→dinosaursappear→mammalsappearAcloudofdust→asolidball→presenceofwater→Astronomyisthescientificstudyoftheuniverseandtheheavenbodies(suchasthesun,themoon,andstars),gas,anddustwithinit.astronomer人教版高中英语THANKS