2023学年完整公开课版人教版unit4

人教版必修3unit4第一课时Teachinggoals教学目标1.Targetlanguage目标语言重点词语：theory,atom,billion,globe,violent,carbon,atmosphere,fundamental,harmful,acid,multiply,oxygen,exist,prevent,dioxide2.Abilitygoals能力目标a.EnableSstotalkaboutthescienceofthestars,thedevelopmentoflifeandspacetravelandgravity.Wheredowecomefrom?Howdidtheuniversebegin?Whyistheuniversethewayitwas?Howwillitend?Howmuchdoyouknowaboutuniverse?Doyouwanttohaveaspacetravel?Doyouknowsomethingaboutgravity?b.Understandthetextandanswerthefollowingquestions:Whatwasthereontheearthbeforelifecouldbegin?Whydoscientiststhinktherehasneverbeenlifeonthemoon?Whydidanimalsfirstappearintheseas?Whydidgreenplantshelplifetodevelop?Whyweremammalsdifferentfromotheranimals?c.EnabletheSstounderstandthedetailsaboutthepassage,choosingthecorrectansweraccordingtothetextandputtheorderofdevelopmentoflifeintoatimelineandanswerquestions.d.Retellthepassageusingkeysentences.3.Learningabilitygoals学能目标EnableSstolearnhowtotalkaboutthebeginningoflifeontheearth.Teachingimportantpoints教学重点a.Talkaboutthebeginningoflifeontheearth.Whydidanimalsfirstappearintheseas?Whydidgreenplantshelplifetodevelop?b.Discusstheorderofdevelopmentoflife.Teachingdifficultpoints教学难点a.Understandthebeginningoflifeontheearth.b.Discussthequestions:Whatwillourfuturebeiftheearthmaybecometoohotforthelivesonit?Whyarehumansthecleverestanimalsontheearth?Teachingmethods教学方法a.Skimmingandscanning.b.Asking-and-answeringactivitytochecktheSs’understandingofthetext.c.Individual,pairorgroupworktofinisheachtask.d.Discussion.Teachingaids教具准备Arecorder,acomputerandaprojector.Teachingprocedures&ways教学过程与方式

StepIPresentationT:Hello,everyone!Todaywe’llcometoUnit4Astronomy.BeforethatIhaveaquestion:Wheredowecomefrom?Orwecansay:Whoareourancestors?S1:Monkeys!S2:BeijingRenwholivedmanyyearsago.S3:Reptiles.S4:Mammals.S5:Amphibians.S6:Dinosaurs.T:Verygood!Canyouputtheminrightorder?S7:Amphibians,Reptiles,Dinosaurs,Mammals,BeijingRen.T:Doyouknowwhatitwaslikebeforelifeappearedonearth?S8:Itwasfullofwater,perhaps.T:Beforethat,whatwasitlike?S9:Sorry,Idon’tknow.T:Doyouwanttogetmoreinformation?Todaywe’lllearnsomethingaboutHowLifeBeganontheEarth.TurntoPage25.Let’scometoWarmingupfirst.

StepIIWarmingup1.Readthethreequestions,whilethestudentslistenandfollow.2.GivetheSsseveralminutestodiscussthequestions.3.Collectanswersfromthewholeclass.4.Checktheanswerswhilediscussing.T:I’llreadthethreequestionsforyou.Youshouldlistentomecarefully.(Ifstudentsdon’tknowhowtodiscuss,showthemanexample.)Forexample,medicine.Whensomeonegetsseriousillness,hewillgotothehospital.Thedoctorwillexaminehim.Hewilltakehistemperature,measurehisbloodpressureandgivehimanX-ray,oraCT.Forthewholeprocessoftheexamination,whatkindofsciencehasbeenused?S1:Biology.S2:Chemistry.T:Sowecansaymedicinecombinesbiologyandchemistry.Whataboutbiochemistryandgeophysics?S3:Ithinkbiochemistrycombinesbiologyandchemistry.S4:Geophysicscombinesgeologyandphysics.T:Whataboutastronomy?S5:Physics.S6:Mathematics.T:Verygood.Weshouldknowthatastronomyisamultidisciplinarysubjectandifwewanttodosomeresearchonit,weshouldknowmanysciencesubjectsrelatedtoit.Nowdiscussthesecondquestion:Whatdowemeanwhenwesaywearestudyingasubjectscientifically?Orwhat’sthecorrectattitudetowardsscience?S7:Weshouldbeobjective,notsuperstitious.T:What’sthecorrectwaytoproveascientificidea?S8:Weshoulddesignexperimentstotestitforseveraltimes.S9:Thenwecananalyzetheresultsanddrawaconclusionatlast.T:Let’ssumuptheanswers.Tostudyasubjectscientifically,wemusttrytobeobjective.Inordertotestouridea,weshoulddesignexperiments,thenanalyzetheresultsanddrawaconclusion.Nowlet’stalkaboutthethirdquestion.Whatarethemostimportantskillsweneedtoberealscientists?S10:Weshouldbeverycareful.S11:Beobjectiveandlogical.S12:Weshouldbewiseenoughtodesignanexperimentandwritethereportsclearly.S13:Weshouldbeabletodrawconclusionsfromtheexperimentsandnotimposeconclusionsonthedata.T:Ithinkyouhavedonegreatwork.Fromthediscussionweknowthatit’snoteasytobeascientist.Soyoushouldworkharderifyouwanttobeascientist.

StepⅢPre-readingGettheSstodiscussthequestionsonPage25withtheirpartners.ThenasktheSstotelltheirstories.EncouragetheSstotelldifferentstories.Iftheydon’tknowany,tellthemsome.T:Nowpleaselookattheslideshow.Anddiscussthesequestionswithyourpartners.ThenI’llasksomestudentstotellustheirstories.Areyouclear?Ss:Yes,Sir/Madam.1.Doyouknoweachreligionorculturehasitsownideasaboutthebeginningoftheuniverse?Pleasegiveanexampleifyouknow.2.Doyouknowwhatascientificideais?AftertheSs’discussion,teachersaysthefollowing.T:Nowwho’dliketotellusastory?Volunteer!S1:Letmetry.InChina,weallknowthatPanguseparatestheskyfromtheearth.T:Canyoudescribethestoryindetails?S1:Sorry,Ican’trememberclearly.T:Whocan?Nobody?NowI’lltellyou.Lookatthescreen.Panguseparatestheskyfromtheearth

Theskyandtheearthwereatfirstoneblurredentitylikeanegg.Panguwasbornintoit.Theseparationoftheskyandtheearthtook18,000years-theYangwhichwaslightandpurerosetobecomethesky,andtheYinwhichwasheavyandmurkysanktoformtheearth.BetweenthemwasPangu,whowentthroughninechangeseveryday,hiswisdom,greaterthanthatoftheskyandhisabilitygreaterthanthatoftheearth.Everydaytheskyrosetenfeethigher,theearthbecametenfeetthicker,andPangugrewtenfeettaller.Another18,000yearspassed,andtherewasanextremelyhighsky,anextremelythickearth,andanextremelytallPangu.ThencametheThreeEmperors(theEmperoroftheSky,theEmperoroftheEarth,andtheEmperoroftheMen.)

Sothesenumberscameintoexistenceandevolvelikethis.Thenumberbeginswithone,becomesestablishedatthree,iscompletedatfive,prospersatseven,andendsinnine.Sotheskyisninetythousandlifromtheearth.OtherlegendsaboutthebeginningofuniverseTheBiblicalAccount

“InthebeginningGodcreatedtheheavensandtheearth.Theearthwasformlessandempty,darknesswasoverthesurfaceofthedeep,andthespiritofGodwashoveringoverthewaters.AndGodsaid”Day1:GodspokeandseparatedlightfromdarknesscreatingDayandNightDay2:GodspokeandseparatedthewatercreatingskyandoceanDay3:GodspokeandcreateddrylandDay4:Godspokeandcreatedthesun,moonandstarsDay5:GodspokeandcreatedlivingcreaturesintheairandseaDay6:GodspokeandcreatedthelandanimalsandmanDay7:GodrestedandblessedthisdaycallingitHoly

India

Brahmahascreatedtheworldmanytimes.Thiscreationisrepeatedeveryfouragesoryugas.Therearefouryugasinoneeonorkalpa.Inthebeginningofeachkalpatheworldisawaterychaos.

AsBrahmathoughtbeingswerecreated.Thedemonswerecreatedbyawindfromhisrectum.Aftercreatingthedemonshediscardedhisbodywhichbecamenight.Heassumedanewbodyandoutofhismouthcametheshininggodsordevas.Thisbodywasalsodiscardedandbecameday.Withhisnextbodyhecreatedancestorspirits.WithhisfourthbodyBrahmacreatedhumanbeings.Thisdiscardedbodybecamethemoon.WiththefifthbodyBrahmahadastrangethoughtandhecreatedogres,terriblecreaturesthatwantedtodevourtheprimordialseaofchaos.Inshockatwhathehaddonehethencreatedghouls.Finallyheregainedhissensesandcreatedbirds,mammals,plantsandalltheotherlifethatweseetoday.

Japan

Inthebeginningtheworldwaschaosuntiltheheavenandearthseparated.WhenthisseparationoccurredtheThreeHighDeitiescreatedtwoprinciples,thepassive,IzanamiortheFemale,andtheactive,IzanagiortheMale.Itwasthesetwopeoplewhoareourancestors.

Inthebeginningtheheavenandtheearthwereone.TheIn(Yin)andYo(Yang)hadnotbeenseparated.Allthatexistedwaschaosintheformofanegg.Thiseggcontainedtheseedsofthecreation.Heaven,beingmadeofthepurerportionofthesubstanceroseandtheearthbeingheavierdidnot.Astheheavenrose，theislandsbegantobeformed.Laterastrangeplantgrewbetweenheavenandearthwhichbecameagreatmalegod.Twoadditionalmalegodsfollowed.Thesethreewereformedbythewillofheaven.FollowingthissixdeifieswereformedandthenIzanagi(themale)andIzanami(thefemale).IzanagiandIzanamiwerethefirstancestors.Theythrustdownthejeweledspearofheavenintothesea.AstheyliftedthespeartheliquidonthetipformedtheislandsofJapan.EuropeCeltic

Thereweregiantsinthepast.Thesegiantswerethegods.Duringthefirstwinteralargegiantwasmadefromthehoarfrost.Whenthisgiantwasexposedtofirehenaturallymelted.Thebodyofthisgiantbecametheworld.Hishairbecametheforests.Hisskullbecamethesky.Hisbloodproducedthesea.Hisbonesproducedthemountains.Inthemiddleoftheearthonhighmountainslivethegods.SouthAmericaInca

TheIncasworshipedagodnamedPachacamac,alsoknownasViracocha.ThisgodhadoriginallyrisenfromthewaterofLakeTiticacaandcreatedthestars,planetsandthemoon.Pachacamaccreatedeverything,includingpeople,outofclay.Becausehefeltsorryforhumans,Pachacamacsenthisdaughter,themoongod,toteachhumanshowtobuildhouses,growcropsandmakeclothes.ThechildrenofPachacamaclivedatlakeTiticacabutcouldtravel.Whentheytraveledtheywererequiredtostickintothegroundagoldenrodtheyreceivedfromtheirfather,Pachacamac.Eachtimethishappenedthehumanswouldbuildacity.T:Aretheyinteresting?Thoughtheyareinteresting,theyareonlylegends.Weshouldbelieveascientificidea.What’sascientificidea?S2:Itshouldbeanideacomingfromscientifictheory.T:Quiteright.Nowwe’llcometoReading.That’sascientificidea.

StepⅣReadingReadthepassagecarefullyandanalyseitsstructure.Writedownthemainideaforeachparagraph.:AwidelyacceptedtheoryabouttheformationoftheuniversePara2:Theformationoftheearth:Theimportanceofwaterforlife:Thedevelopmentofplantsandanimalsontheearth:Thearrivalofhumansandtheirimpactontheearth

Readingandanswerthequestions.1.Whywastheearthdifferentfromotherplanets?

Thewaterremained.2.Whywaslifeabletodevelopontheearthbutnotonotherplanets?

Thewaterstayedontheearthbutnotonotherplanets.3.Whywasitnecessaryforplantstogrowbeforeanimals?

Plantsprovidedoxygenforanimalstobreathe.4.Whatproblemiscausedbyhumanbeings?

Theycauseglobalwarming.5.Whyisitwronginfilmsandstoriestoshowdinosaursandpeopletogether?

Becausedinosaursdiedoutlongbeforehumanbeingsdevelopedontheearth.6.Whydoyouthinkthathumansarethecleverestanimalsontheearth?

Theyarethecleverestanimalsbecausetheyhavelargerbrainsthananyothercreatureontheearthsofar.7.Whyisitwronginfilmsandstoriestoshowdinosaursandpeopletogether?

Becausedinosaursdiedoutlongbeforehumanbeingsdevelopedontheearth.8.Thereusedtobenineplanetsinthesolarsystem.Recentlyscientistshavedecidedthatoneofthemcannolongerbeconsideredaplanet.Doyouknowthenameofthatplanet?Doyouknowwhytheyremovedit?

Pluto.Scientistsnowthinkitistoosmalltobecalledaplanet.

Analyzehowlifebeganonearth.

ListeningListentothetapeforthestudentstofollowandhavefurtherunderstandingofthepassage.T:Readafterthetape,thenanswermesomequestionswithyourbookclosed.PlaythetapeT:Howdidwatercomeintobeingontheearth?Ifonestudentcan’tanswercompletely,asktwoorthreeormorestudents.Ss:Theexplosionoftheearthproducedwatervapor,whichturnedintowaterwhentheearthcooleddown.T:Whyiswaterimportantontheearth?Ss:Becausewaterallowedtheearthtodissolveharmfulgasesintotheoceansandseas.T:,finishthefollowingform.

1smallplantsinwater

2

3greenplantsonland

4insects(onland)56forests7

8

9

Keytotheexercise:2.shellfishandallsortsoffish

(onlandandinwater)7.reptiles(onland)

(onland)

(onland)T:That’sallforthispassage.Nowlet’sdealwithsomelanguagepoints.

PassageAnalyzingChartofthetextHowlifebeganontheearthwater

1smallplantsinwater

2shellfishandallsortsoffish

3greenplantsonland

4insects(onland)5amphibians(onlandandinwater)

6forests

7reptiles(onland)8dinosaurs(onland)9mammals(onland)

10.smallcleveranimalswithhandsandfeet

11.human

4insects(onland)5amphibians(onlandandinwater)

TextRetelling

Retellthetextusingabout100words.Notes:Usethetwoquestionsandthecharttoretellthepassage;thepossibleversionbelowcanbeusedasamaterialforbothretellinganddictation.Retelling:

Theexplosionoftheearthproducedwatervapour,whichturnedintowaterwhentheearthcooleddown.Waterallowedtheearthtodissolveharmfulgasesintotheoceansandseas.Thatmadeitpossibleforlifetobegintodevelop.Thearrivalofsmallplantsencouragedthedevelopmentofearlyshellfishandallsortsoffish.Manymillionsofyearslaterthefirstgreenplantsbegantoappearonland.Laterlandanimalsappeared.Somewereinsects.Others,callbeginningwithtwoquestionssoasto