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1、Unit4教案Teachingaims:1.Enablestudentstoimprovetheirlisteningskillsandreadingability.2.Enablestudentstounderstandthedevelopmentofgravityandhowgravityaffectsusindifferenttimesandplaces.3.Arousestudents’interesttosearchforthemysteryofspace.Emphasis:1.Wordsandexpress
2、ions:gravity,float,cheerup,nowthat,breakout,etc2.Astronomicknowledgelikegravityandblackhole.Difficulties:1.Helpthestudentstounderstandthedevelopmentofgravity.2.Helpthestudentstoknowhowgravityinfluencesus.Teachingmethods:skimming,scanning,discussing.Teachingaids:
3、ataperecorder,aprojectorandacomputer.Teachingprocedures:ThefirstperiodreadingStepIPresentationT:Hello,everyone!Todaywe’llcometoUnit4Astronomy.BeforethatIhaveaquestion:Wheredowecomefrom?Orwecansay:Whoareourancestors?S1:Monkeys!S2:BeijingRenwholivedmanyyearsago.S3
4、: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.
5、T:Doyouwanttogetmoreinformation?Todaywe’lllearnsomethingaboutHowLifeBeganontheEarth.TurntoPage25.Let’scometoWarmingupfirst.StepIIWarmingup1.Readthethreequestions,whilethestudentslistenandfollow.2.GivetheSsseveralminutestodiscussthequestions.3.Collectanswersfromt
6、hewholeclass.4.Checktheanswerswhilediscussing.T:I’llreadthethreequestionsforyou.Youshouldlistentomecarefully.(Ifstudentsdon’tknowhowtodiscuss,showthemanexample.)Forexample,medicine.Whensomeonegetsseriousillness,hewillgotothehospital.Thedoctorwillexaminehim.Hewil
7、ltakehistemperature,measurehisbloodpressureandgivehimanX-ray,oraCT.Forthewholeprocessoftheexamination,whatkindofsciencehasbeenused?S1:Biology.S2:Chemistry.T:Sowecansaymedicinecombinesbiologyandchemistry.Whataboutbiochemistryandgeophysics?S3:Ithinkbiochemistrycom
8、binesbiologyandchemistry.S4:Geophysicscombinesgeologyandphysics.T:Whataboutastronomy?S5:Physics.S6:Mathematics.T:Verygood.Weshouldknowthatastronomyisamultidisciplinar
