高二英语教案：实验版第3册Unit4教学资源.pdf

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1、Unit4Astronomy:thescienceofthestarsPart2:TeachingResources(第二部分：教学资源)Section1:AtextstructureanalysisofHOWLIFEBEGANONTHEEARTH1.TypeofwritingandsummaryofthetextTypeofwritingThisisadescriptivewriting.MainideaofthepassageTheearthcameintobeingafterthe“BigBang”Then.smallplantscamegrowinginthewater,fol

2、lowedbygreenplantsappearingonland.Intheendappearedsmallcleveranimals.stTopicsentenceof1paragraphAfterthe“BigBang”,theearthwasjustacloudofenergeticdust.ndTopicsentenceof2paragraphTheearthwasdifferentbecauseofthearrivalofsmallplantsgrowinginthewater.rdTopicsentenceof3paragraphManymillionsofyearsla

3、terthefirstgreenplantsbegantoappearonland.thTopicsentenceof4paragraphSmallcleveranimalsappearedandspreadallovertheearth.2.AtreediagramAfterthe“BigBang”,theearthbeingjustacloudofenergeticdust.thearrivalofgreenplantsSmallcleverbeginningtoanimalssmallplantsappearonappearingandwinginthelandspreading

4、allovertheearth.water第1页共3页Section2:BackgroundinformationforUnit4Astronomy:thescienceofthestars1.THEPLANETS行星AlthoughweliveinaverysmallpieceoftheUniverse,it'sstillwherewecallhomeandit'saveryinterestingplace.Thenineplanetsthatmakeupoursolarsystemrangefromverytinyrockyplanetstohugegasgiantsfeaturi

5、ngfascinatingringsystems.Mercury水星MercuryistheclosestplanettotheSun.Itssurfacehasmanythousandsofimpactcratersasaresultofbeingbombardedbyobjectssincethesolarsystem'searlydays.SinceMercuryhasnoprotectiveatmosphere,thetemperatureonthesurfacerangesfromextremelyhotonthesidefacingtheSuntoextremelycold

6、onthesidethatfacesawayfromtheSun.Venus金星（太白星）VenusisnamedaftertheRomangoddessofloveandbeauty.Thisisoneofthosecaseswherebeautyisonlyskindeep,though,asthesurfaceofVenusisaveryunpleasantplacefeaturingveryhightemperatures,windsthatblowhundredsofmilesperhourandanatmosphereofsulfuricacid.Venusisanexam

7、pleofrunawaygreenhouseeffectonaplanetaryscale.Earth地球Peoplealwayssaythere'snoplacelikehome.Ourhomeplanetisaverybeautifulplacewiththemostvariedsurfaceintheentiresolarsystem.Fromadistance,ourplanetlookslikeabeautifulbigbluemar