grade 8 natural sciences - doc scientiapage279 in grade 8 natural sciences textbook and workbook use...
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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.