2019-2020年高中英语Unit4Astronomy导学案1新人教版必修3.doc

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1、2019-2020年高中英语Unit4Astronomy导学案1新人教版必修3Pre-reading.1.Theoriginoflifeonearthisaquestionthatinterestsastronomers.Whatdoyouknowaboutit?•Howoldistheuniverse?(severalbillionyearsago)•HowoldistheEarth?(between4.5and3.8millionyearsago)•WhichwerethefirstcreaturesorplantsonEarth2.Eachreli

2、gionandculturehasitsownideasabouthowlifebeganonearth.Whatdoyouknow?InChina,weallknowthatPanguseparatestheskyfromtheearth.Questions:1.Whatdowemeanwhenwesaywearestudyingasubjectscientifically?Orwhat’sthecorrectattitudetowardsscience?Weshouldbeobjective,notsuperstitious.2.What’sthec

3、orrectwaytoproveascientificidea?Weshoulddesignexperimentstotestitforseveraltimes.Thenwecananalyzetheresultsanddrawaconclusionatlast.3.Whatarethemostimportantskillsweneedtoberealscientists?Careful,objectiveandlogical,drawconclusionsfromtheexperimentsandnotimposeconclusionsonthedat

4、a.(impose…on…把…强加于…)ReadingI.Readthepassagecarefullyandanalyseitsstructure.Writedownthemainideaforeachparagraph.Para1AwidelyacceptedtheoryabouttheformationoftheuniversePara2TheformationoftheearthPara3TheimportanceofwaterforlifePara4ThedevelopmentofplantsandanimalsontheearthPara5T

5、hearrivalofhumansandtheirimpactontheearthII.Readthetextandfillintheblanksinthefollowingform.TimeWhathappenedBigBang______begantoformandcombinetocreatestarsandotherbodies.Between4.5and3.8billionyearsago●Dustsettledintoasolidand______globe.●Theearthexplodedtoproduceits___________.●

6、Thecontinued________ofwaterallowedtheearthtodissolveharmfulgasesand_____intotheoceansandseas.Manymillionsofyearslater●Thefirstsmallplantsonthesurfaceofthewaterproduced_______.●Early_______andallsortsoffishappeared.●Greenplantsbegantogrowonland.●Insectsand___________appeared.IV.Tr

7、ue(T)orFalse(F).1.TheearthappearedbeforetheBigBanghappened.2.Theoriginalatmosphereconsistedofnitrogenandoxygen.3.WateralsoappearedonotherplanetslikeMars,butitdisappearedlater.4.Lifebeganinwaterandthenonland.5.Mammalsappearedbeforethedevelopmentofdinosaurs.Howlifebeganonearthisone

8、ofthebiggestpuzzlesthatscientistsfoundha