astronomy the science of the stars教案6

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1、Unit4Astronomy:thescienceofstar-Warmingup&Reading教案HowlifebeganontheearthStepone:warmingupTask1:Commomsense(常识)ofscience.Physics,chemistry,biology（studyoflife),geology(地质学)andmathematicsaresciencesubjects.Somesciencesubjectswillstudytwoormoreofthesesubjects,forexample,thestudyo

2、fphysicsandmathematicsisastronomy(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(_____________)=____

3、_________+_______________task2:Commonsenseofbiology------studyofthegroupsoflife(生命的种类/物种)Lookatthepicturesonthescreenandjudgethegroupsasquicklyasyoucan.Whatisthemostimportantconditionforlifetodevelop(grow)?(water,air---oxygen)Steptwo:Pre-readingTheworldislikeabigfamily.It’swond

4、erfulandcolorfulbecauseofdifferentkindsoflifelivingtogether.Buthowdidlifebeginontheearth?Thefirstquestionforscientiststoanswerishowwaterappearedontheearth?Stepthree:ReadingTask1:Fast-reading(Para1)1.Whatistheimportantevent(事件)totheearthbeforetheappearanceofwater?2.Whyiswaterimp

5、ortantforthebeginningoflife?Task2:Sacnning(Para1,2,3)thebeginningofwater&thebeginningoflifeScanPara1:thebeginningofwater1.theBigBang2.acloudofdust(combineinto)3.aball/asolidshape(explode)4.watervapour,oxygen,…andothergas(cooldown)5.waterScanPara2,3:thebeginningoflife(putthemint

6、orightorder)A.insectsandamphibiansappearB.reptilesappearC.shellfishandotherfishappearD.dinosaursappearE.smallplantsgrowonthewaterF.plantsbegintogrowondrylandG.mammals(includinghumans)appear5.Water6.______7._______8._______9.______10.______11.______12.______Task3:Careful-reading

7、1.Whytheearthwasdifferentafterthewaterappeared?2.Whydidplantsgrowbeforeanimals?3.Whydidanimalsfirstappearintheseanotontheland?4.Whatisthemaindifferencebetweenreptilesandmammals?Canyougivesomeexamplesofmammals?StepFour:CooperativelearningDisscussthefollowingquestions,andusePara4

8、tohelpyou.1.Whydopeoplebecomethemostimportantanimalson