Unit4Astronomy:thescienceofstar-Warmingup&Reading教案HowlifebeganontheearthStepone:warmingupTask1:Commomsense(常识)ofscience.Physics,chemistry,biology（studyoflife),geology(地质学)andmathematicsaresciencesubjects.Somesciencesubjectswillstudytwoormoreofthesesubjects,forexample,thestudyofphysicsandmathematicsisastronomy(天文学).Canyouunderstandthefollowingcombinedsciencesubjects.1.physics+mathematics=astronomy2.geology+physics=geophysics（地球物理学）3.biology+chemistry=biochemistry()/medicine()4.geopolitics（地缘政治学）=_________+_________5.bioengineering(_____________)=_____________+_______________task2:Commonsenseofbiology------studyofthegroupsoflife(生命的种类/物种)Lookatthepicturesonthescreenandjudgethegroupsasquicklyasyoucan.Whatisthemostimportantconditionforlifetodevelop(grow)?(water,air---oxygen)Steptwo:Pre-readingTheworldislikeabigfamily.It’swonderfulandcolorfulbecauseofdifferentkindsoflifelivingtogether.Buthowdidlifebeginontheearth?Thefirstquestionforscientiststoanswerishowwaterappearedontheearth?Stepthree:ReadingTask1:Fast-reading(Para1)1.Whatistheimportantevent(事件)totheearthbeforetheappearanceofwater?2.Whyiswaterimportantforthebeginningoflife?Task2:Sacnning(Para1,2,3)thebeginningofwater&thebeginningoflife用心爱心专心ScanPara1:thebeginningofwater1.theBigBang2.acloudofdust(combineinto)3.aball/asolidshape(explode)4.watervapour,oxygen,…andothergas(cooldown)5.waterScanPara2,3:thebeginningoflife(putthemintorightorder)A.insectsandamphibiansappearB.reptilesappearC.shellfishandotherfishappearD.dinosaursappearE.smallplantsgrowonthewaterF.plantsbegintogrowondrylandG.mammals(includinghumans)appear5.Water6.______7._______8._______9.______10.______11.______12.______Task3:Careful-reading1.Whytheearthwasdifferentafterthewaterappeared?2.Whydidplantsgrowbeforeanimals?3.Whydidanimalsfirstappearintheseanotontheland?4.Whatisthemaindifferencebetweenreptilesandmammals?Canyougivesomeexamplesofmammals?StepFour:CooperativelearningDisscussthefollowingquestions,andusePara4tohelpyou.1.Whydopeoplebecomethemostimportantanimalsontheplanet?2.Dopeopletakecareoftheearth?Whataretheydoingtotheplanet?3.Whatistheresult?Stepfour:Discussformoraleducation•Whydiddinosaursdieout?•Doyouthinktherewillbeasuddenchangeofweatherontheearth?•Whatshouldpeopledotoprotectourearth?Exxforevaluation:Afterthe“BigBan”,theearthwasjustacloudof__________dust.It________loudlywithfireandrocks,whichwere________toproducethewatervapour,________andothergases.Thensmalllantsgrew.They________andfilledtheoceansandseaswithoxygen.Manymillionsofyearslater,thefirstgrenplantsbeganto________onland.Whentheplantsgrewintoforests,________用心爱心专心appearedforthefirsttime.Theyproducedyounggenerallyby________eggs.Whendinosaursdisappeared,________becamemoreimportant.Nowsmallcleveranimalswith________appearedand__________allovertheworld.Astimewentbytheycoveredtheearthandtheyareputtingtoomuchcarbondioxideintothe________,which________heat________escapingfromtheearthintospace.Whetherlifewillcontinueonearthformillionsofyearstocomewill________whetherthisproblemcanbesolved.用心爱心专心
