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18 Cards in this Set

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Aurora
sheets of colored light produced by a magnetic storm in the earth's upper atmosphere.
Chromosphere
thin layer of the sun's atmosphere that lies above the photosphere and glows with a redish light; color sphere.
Convective Zone
region around the sun's radiative zone in which moving gases transfer energy.
Corona
outermost layer of the sun's atmosphere; crown.
moon
body that is smaller than a planet and orbits the planet.
Nebular theory
theory that the sun and the planets condensed out of a spinninng cloud of dust and gas.
Photosphere
innermost layer of the solar atmosphere; light sphere.
Planet
any one of the nine major bodies that orbit the sun.
planetesimal
samll body of matter that formed in the outer regions of the solar nebula while the sun was still forming in it's center.
prominence
cloud of glowing gases that arches high above the sun's surface.
protoplanet
large body of matter that formed from the coalescence of planetesimals in the solar nebula.
radiative zone
region surronding the core of the sun in which energy is transferred in the form of electromagnetic waves.
solar flare
sudden, violent eruption of electrically charged atomic particales from the sun's surface.
solar nebula
cloud of gas and dust that developed into the solar system
solar system
the sun and the bodies that revolve around it.
solar wind
electrically charged atomic particles that stream out into space through holes in the sun's corona.
sunspot
cool, dark area of gas within the photosphere caused by powerful magnetic fields.
sunspot cycle
periodic variation in the number of sunspots that occurs approximately every 11 years.