Grade 8 Natural SciencesPage279 in Grade 8 Natural Sciences Textbook and Workbook Use a flat...

Grade8NaturalSciences

Term4:Earthandbeyond

BeyondthesolarsystemUniverse

Galaxies

MilkyWayGalaxy

SunCentreofoursolarsystem

Eightplanets

Dwarfplanets Asteroids Meteorites Satellites

Comets

BeyondthesolarsystemQuickfactsSatellitesareman-made,semi-independentcomputercontrolledsystems.2.1Galaxies

Galaxies:•sizesandshapesdiffer;•consistofgas,dustandanever-endingnumberofstars;•starsareheldtogetherbymutualgravitaOon(aQracOveforces);•isolatedfromsimilarsystemsbylargespaces.

Beyondthesolarsystem

2.2MilkyWayGalaxyTheMilkyWayisagalaxythatlookslikeahazybandstretchingovertheskies.OursunisoneofthestarsintheMilkyWaygalaxy.Spiral-shapedgalaxyOursunislocatedtowardstheedgeoftheMilkyWaygalaxyinoneofthespiralarms.

Page279inGrade8NaturalSciencesTextbookandWorkbook

Useaflatsurface,likealargetray/hardboard,andsand.UsethesandtodemonstratethesphericalshapeoftheMilkyWaygalaxywiththearms.UseasmallbuHontorepresentourgalaxyinoneofthearms.