高中英语 Unit4 Astronomy the science of the stars导学案5 新人教版必修3.doc

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1、Astronomy:thescienceofthestars编号001【学习目标】studentsunderstandthetext’sformsandcontentsandlearnaboutfestivalAstronomy【教学重点】thewordsandtheexpressionsinthetext【教学难点】Howtoenablethestudentstograsptheusagesofwordsandinordertoandunderstandsomedifficultandlongsentences.【知识链接】科学家透露：宇宙可能有两个我们的宇宙和一个"隐藏的"宇宙共同"镶

2、嵌"在"五维空间"中。在我们的宇宙早期，这两个宇宙发生了一次相撞事故，相撞产生的能量生成了我们宇宙中的物质和能量。【自主预习】Doyouknowhowtheuniversebegan?Inthe1920sinCalifornia,astronomerEdwinHubbleobserveddistantgalaxiesusinganextremelypowerfultelescope.Hemadetwomind-boggling(unbelievable)discoveries.First,HubblefiguredoutthattheMilkyWayisn’ttheonlygalaxy.H

3、erealizedthatfaint,cloud-likeobjectsinthenightskyareactuallyothergalaxiesfar,faraway.TheMilkyWayisjustoneofbillionsofgalaxies.Second,Hubblediscoveredthatthegalaxiesareconstantlymovingawayfromeachother.Inotherwords,theuniverseisexpanding.Thebiggestthingthatweknowaboutisgettingbiggerallthetime.Afewy

4、earslater,BelgianastronomerGeorgesLemaîtreusedHubble‘samaz【自学检测】acloudofenergeticdust____________combineinto__________becomeviolent__________________thesolidsurface____________explodeloudly________________producethewatervapor____________maketheearth’satmosphere__________________cooldown___________

5、___bedifferentfrom_____________disappearfrom_______________showone’squality___________________dissolveharmfulgases______________________,developlife______________encouragethedevelopmentof…_________________produceyoung______________layeggs______________spreadallovertheearth__________________,movear

6、ound____________,goby___________prevent…from…______________escapefrom…into…________________,becomehot_______dependon…_____________________【预习疑问】【课堂探究】Task1Scanningthetexttoanswerthequestionsbelow.1.Whatistheoriginalearth’satmospheremadeupof?2.Whatisthefundamentaltothedevelopmentoflife?3.Whichkindo

7、flife-beingfirstappearedontheearth,plantsoranimals?4.Choosethemainideaforeachparagraph()Thearrivalofhumansandtheirimpactontheearth.()Theformationoftheearth.()Thedevelopmentofplantsandanimalsontheearth.()Awidelyac