Unit4Astronomythescienceofstars教案人教必修三

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1、[Unit4Astronomy:thescienceofstarsPeiiod2RendingCompiehendingTeachingAims:EnabletheSstosaysomethingaboutastronomyHelpthestudentstoformagoodhabitofreadingCultivatetheSs1awarenessofprotectingtheearth.TeachingImportance:HowtoimprovetheSs'abilitytounderstandhowlifebeganontheearthTeachingMethods:T

2、ask—basedmethodTeachingProcedure:Stepl.Warmingup1.Freetalk2.ReviewthewordsofUnit4byplayingchessontheblackboard.Step2Leading-in1.Talkaboutsomepictures.2.WatchavideoandthenasktheSstoputthepicturesonthescreenintoarightorder.Step3ReadingTask1SkimmingReadthepassagequicklyandjointhemainideaforeach

3、paragraph.Para.la)ThearrivalofhumansandtheirimpactontheearthPara.2b)ThedevelopmentofplantsandanimalsontheearthPara.3c)AwidelyacceptedtheoryabouttheformationoftheuniversePara.4d)TheimportaneeofwaterforlifePara.5e)TheformationoftheearthTask2ScanningReadthepassagecarefullyandthenfillintheblanks

4、withdifferentkindsoflivingthings.Fillintheblankswithdifferentkindsoflivingthings・plantsanimalsStaallplantsinwator=>shellfishandallsortsoffish/4insectsgreenplantsonland.gamphibians一”一—一―f、/、6forests//7reptiles円8dinosaurs'、9mammals/"Task3CarefulReading:Finishthesummaryaccordingtothetext:Aftert

5、he"bigbang：theearthwasstilljustacloudof,itloudlywithfireandrock,whichweretoproducethe,carbondioxideandothergases.Thengrew・Theymultipliedandfilledtheoceansandseaswith•Manymillionsofyearslaterthefirstbegantoappearonland.Whentheplantsgrewtoforest,appearedforthefirsttime.Theyproducedyounggeneral

6、lyby.Whendinosaursdisappeared,becamemoreimportant.Task4PostReadingDiscussingroups.1.Whatproblemshavebeencausedbyhumanstotheearth?2.Howtoprotecttheearthandmakeitabetterplacetoliveon?Step4Homework1.SearchtheInternetfortheimformationofthedevelopmentoflife.2.Readthepassagecarefullyandtrytofindou

7、tkeypoints.