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Unit4 Astronomy the science of the stars教学资源 新课标 人教版 必修3.doc

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用心爱心专心117号编辑3Unit4Astronomythescienceofthestars教学资源Part2:TeachingResources(第二部分：教学资源)Section1:AtextstructureanalysisofHOWLIFEBEGANONTHEEARTH1.TypeofwritingandsummaryofthetextTypeofwritingThisisadescriptivewriting.MainideaofthepassageTheearthcameintobeingafterthe“BigBang”.Thensmallplantscamegrowinginthewaterfollowedbygreenplantsappearingonland.Intheendappearedsmallcleveranimals.Topicsentenceof1stparagraphAfterthe“BigBang”theearthwasjustacloudofenergeticdust.Topicsentenceof2ndparagraphTheearthwasdifferentbecauseofthearrivalofsmallplantsgrowinginthewater.Topicsentenceof3rdparagraphManymillionsofyearslaterthefirstgreenplantsbegantoappearonland.Topicsentenceof4thparagraphSmallcleveranimalsappearedandspreadallovertheearth.2.AtreediagramAfterthe“BigBang”theearthbeingjustacloudofenergeticdust.Smallcleveranimalsappearingandspreadingallovertheearth.greenplantsbeginningtoappearonlandthearrivalofsmallplantswinginthewaterSection2:BackgroundinformationforUnit4Astronomy:thescienceofthestars1.THEPLANETS行星AlthoughweliveinaverysmallpieceoftheUniverseit'sstillwherewecallhomeandit'saveryinterestingplace.Thenineplanetsthatmakeupoursolarsystemrangefromverytinyrockyplanetstohugegasgiantsfeaturingfascinatingringsystems.Mercury水星MercuryistheclosestplanettotheSun.Itssurfacehasmanythousandsofimpactcratersasaresultofbeingbombardedbyobjectssincethesolarsystem'searlydays.SinceMercuryhasnoprotectiveatmospherethetemperatureonthesurfacerangesfromextremelyhotonthesidefacingtheSuntoextremelycoldonthesidethatfacesawayfromtheSun.Venus金星（太白星）VenusisnamedaftertheRomangoddessofloveandbeauty.Thisisoneofthosecaseswherebeautyisonlyskindeepthoughasthesurface