《Astronomy：thescienceoftheStars》素材（人教版必修3）

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1、Unit4Astronomy:thescienceofthestarsPart2:TeachingResources（第二部分：教学资源）Section1:AtextstructureanalysisofHOWLIFEBEGANONTHEEARTH1.TypeofwritingandsummaryofthetextTypeofwritingThisisadescriptivewriting・MainideaofthepassageTheearthcameintobeingafterthe"Big

2、Bang”・Thensmallplantscamegrowinginthewater,followedbygreenplantsappearingonland・Intheendappearedsmallcleveranimals.TopicsentenceoflslparagraphAfterthe"BigBang",theearthwasjustacloudofenergeticdust.Topicsentenceof2ndparagraphTheearthwasdifferentbecaus

3、eofthearrivalofsmallplantsgrowinginthewater.Topicsentenceof3rdparagraphManymillionsofyearslaterthefirstgreenplantsbegantoappearonland.Topicsentenceof4thparagraphSmallcleveranimalsappearedandspreadallovertheearth・2.AtreediagramSection2:Backgroundinfor

4、mationforUnit4Astronomy:thescienceofthestars1.THEPLANETS行星AlthoughweliveinaverysmallpieceoftheUniverse,it'sstillwherewecallhomeandit'saveryinterestingplace.Thenineplanetsthatmakeupoursolarsystemrangefromverytinyrockyplanetstohugegasgiantsfeaturingfas

5、cinatingringsystems.Mercury水星MercuryistheclosestplanettotheSun・Itssurfacehasmanythousandsofimpactcratersasaresultofbeingbombardedbyobjectssincethesolarsystem'searlydays.SinceMercuryhasnoprotectiveatmosphere,thetemperatureonthesurfacerangesfromextreme

6、lyhotonthesidefacingtheSuntoextremelycoldonthesidethatfacesawayfromtheSun.Venus金星（太白星）VenusisnamedaftertheRomangoddessofloveandbeauty.Thisisoneofthosecaseswherebeautyisonlyskindeep,though,asthesurfaceofVenusisaveryunpleasantplacefeaturingveryhightemp

7、eratures,windsthatblowhundredsofmilesperhourandanatmosphereofsulfuricacid.Venusisanexampleofrunawaygreenhouseeffectonaplanetaryscale・Earth地球Peoplealwayssaythere'snoplacelikehome.Ourhomeplanetisaverybeautifulplacewiththemostvariedsurfaceintheentiresol

8、arsystem・Fromadistance,ourplanetlookslikeabeautifulbigbluemarble.Mars火星TheRedPlanetisnamedaftertheRomangodofwar.Itsdistinctiverustcoloriseasilyseenthroughasmalltelescope・ThesurfaceofMarsfeaturesmanymountains,canyonsandevenpolaricecapsthatlookalotlike