必修3Unit4Astronomythescienceofthestars[全套教案]

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1、Unit4Astronomy:thescienceofthestarsI单元教学目标技能目标GoalsTalkaboutthescienceofthestars,thedevelopmentoflifeandspacetravelandgravityPractisegivinginstructionsPractisetalkingabutproblemsinstudyorlifeLearntouseNounClausesasthesubjectLearntowriteanessaytoshowyourprobl

2、emsandthewaytoovercomethem.II.目标语言词汇1四会词汇astronomy,atmosphere,system,violent,solid,explode,carbon,dioxide,oxygen,surface,planet,harmful,development,spread,method,depend,exist,presence,telescope,disappoint,disappointed,publish,publishing,gravity,force,gradual

3、ly,cheer,float,mass2认读词汇astronomer,biochemistry,geophysics,solar,BigBang,vapour,nitrogen,dissolve,amphibian,reptile,generally,mammal,global,comet,IssacNewton,AlbertEinstein,StephenHawking,lessen,weightlessly,cabin,exhaust,exclaim3词组solarsystem,intime,prevent

4、…from,dependon,cheerup,nowthat,getthehangof,breakout语法NounClausesasthesubjectNounClausesasthesubjectisalsocalledtheSubjectClause.ThatmeansaNounClauseservesasSubjectinthesentence.ThewordswhichareusedinthisNounClauseare:that,whether,who,what,which,when,where,h

5、ow,why,etc..Example1.Whatitwastobecomewasamystery.2.Itwasnotclearwhetherthesolidshapewastolastornot.重点句子1.Whatitwastobecomewasamysteryuntilthedustbegantoslowlycombineintoaballmovingaroundthesun.P252.It’sexplodedloudlywithfireandrock,whichwereintimetoproducet

6、hewatervapour,carbondioxide,oxygen,nitrogenandothergases,whichweretomaketheearth’satmosphere.P253.Itallowedtheearthtodissolveharmfulgases,whichhadbecomepartoftheearth’satmosphere,intotheoceansandseas.P254.Whetherlifewillcontinueontheearthformillionsofyearsto

7、comewilldependonwhetherthisproblemcanbesolved.P265.Whenwegetclosertothemoon,weshallfeelitsgravitypullingusbutitwillnotbeasstrongapullastheearth’s.P306.Walkingdoesneedabitofpracticenowthatgravityhaschanged.P317.Wewatched,amazedasfirebrokeoutontheoutsideofthes

8、paceshiptheearth’sgravityincreased.P31第8页共8页1.Seenfromspace,theearthappearstobeawaterball.2.Buttheanswershavealwaysseemedwellbeyondourreach,untilnow.3.Hugequestionsremaintobeanswered,beforewecan