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Unit4Astronomy:thescienceofthestarsTeachinggoals教学目标1.Targetlanguage目标语言a重点词汇和短语astronomy,atmosphere,system,violent,solid,explode,carbon,dioxide,oxygen,surface,planet,harmful,development,spread,method,depend,solarsystem,intime,prevent…from,dependonb重点句子1.Whatitwastobecomewasamysteryuntilthedustbegantoslowlycombineintoaballmovingaroundthesun.P252.It’sexplodedloudlywithfireandrock,whichwereintimetoproducethewatervapour,carbondioxide,oxygen,nitrogenandothergases,whichweretomaketheearth’satmosphere.P253.Itallowedtheearthtodissolveharmfulgases,whichhadbecomepartoftheearth’satmosphere,intotheoceansandseas.P254.Whetherlifewillcontinueontheearthformillionsofyearstocomewilldependonwhetherthisproblemcanbesolved.P262.Abilitygoals能力目标a.EnableSstotalkaboutthescienceofthestars,thedevelopmentoflifeandspacetravelandgravityWheredowecomefrom?Howdidtheuniversebegin?Whyistheuniversethewayitwas?Howwillitend?Howmuchdoyouknowaboutuniverse?Doyouwanttohaveaspacetravel?Doyouknowsomethingaboutgravity?b.Understandthetextandanswerthefollowingquestions:1.Whatwasthereontheearthbeforelifecouldbegin?2.Whydoscientiststhinktherehasneverbeenlifeonthemoon?3.Whydidanimalsfirstappearintheseas?4.Whydidgreenplantshelplifetodevelop?5.Whyweremammalsdifferentfromotheranimals?c.EnabletheSstounderstandthedetailsaboutthepassage,choosingthecorrectansweraccordingtothetextandputtheorderofdevelopmentoflifeintoatimelineandanswerquestions.d.Retellthepassageusingkeysentences.3.Learningabilitygoals学能目标[来源:Zxxk.Com]EnableSslearnhowtotalkaboutthebeginningoflifeontheearth.Teachingimportantpoints教学重点a.Talkaboutthebeginningoflifeontheearth.Whydidanimalsfirstappearintheseas?Whydidgreenplantshelplifetodevelop?b.DiscusstheorderofdevelopmentoflifeTeachingdifficultpoints教学难点a.Understandthebeginningoflifeontheearth.b.Discussthequestions:Whatwillourfuturebeiftheearthmaybecometoohotforthelivesonit?Whyarehumansthecleverestanimalsontheearth?Teachingmethods教学方法a.Skimmingandscanningb.Asking-and-answeringactivitytochecktheSs’understandingofthetext.c.Individual,pairorgroupworktofinisheachtask.d.Discussion.Teachingaids教具准备Arecorder,acomputer,aprojectorTeachingprocedures&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,BeijingRenT:Doyouknowwhatitwaslikebeforelifeappearedonearth?S8:Itwasfullofwater,perhaps.T:Beforethat,whatwasitlike?S9:Sorry,Idon’tknow.T:Doyouwanttogetmoreinformation?Todaywe’lllearnsomethingaboutHowLifeBeganontheEarth.TurntoPage25.Let’scometoWarmingupfirst.StepIIWarmingup1.Readthethreequestions,whilethestudentslistenandfollow.2.Givethemsometimetodiscussthequestions.3.Collectanswersfromthewholeclass.4.Checktheanswerswhilediscuss..T:I’llreadthethreequestionsforyou.Youshouldlistentomecarefully.(Ifstudentsdon’tknowhowtodiscuss,showthemanexample.)Forexample,medicine.Whensomeonegetsveryseriousillness,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.Nowwetalkaboutthethirdquestion.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.Doyouknoweachreligionorculturehasit’sownideasaboutthebeginningoftheuniverse?Pleasegiveanexampleifyouknow.2.Doyouknowwhatascientificideais?AftertheSs’discussion,t