Earth Science Chapter 28
Key Words
Terms
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- auroras
- sheets of coloured light produced by a magnetic storm in the earths upper atmosphere
- solar flare
- sudden violent eruption of electrically charged atomic particles from the suns surface
- convective zone
- region around the suns radiative zone in which moving gases transfer energy
- sunspot cycles
- periodic variation in the number of sunspots that occurs aproximately every 11 years
- prominences
- cloud of glowing gases that arches high above the suns surface
- chromosphere
- thin layer of the sun's atmosphere that lies above the photosphere and glows with a redish light; colour sphere
- solar wind
- electrically charged atomic particles that stream out into space through holes in the suns corona
- nebular theory
- theory that the sun and the planets condensed out of a spinning cloud of gas and dust
- corona
- outmost layer of the suns atmospere; crown
- plantesimals
- small body of matter that formed in outer regions of the solar nebula while the sun was forming in its center
- solar system
- the sun and the bodies that revolve around it
- planets
- nine major bodies that orbit the sun
- protoplanets
- large body of matter that formed from the coalescene of plantesimals in the solar nebula
- solar nebula
- cloud of gas and dust that developed into the solar system
- radiative zone
- region surrounding the core of the sun in which energy is transferred in the form of electro magnetic waves
- sunspots
- cool, dark area of gas within the protosphere caused by powerful magnetic fields
- photosphere
- innermost layer of the solar atmosphere light sphere