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Ch 20 sec. 2&4
Question | Answer |
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the combonation of the nuclei of small atoms to form a larger nucleus; releases energy | nuclear fusion |
a dark area of the photosphere of the sun that is cooler than surrounding areas and that has a strong magnetic field | sun spot |
the suns outer atmosphere | corona |
a thin region below the corona only 30,000 km thick | chromosphere |
the visible part of the sun that we can see from earth | photosphere |
a region about 20,000 km thick where gases circulate | convective zone |
a very dense region about 30,000 km thick | radiative zone |
the center of the sun where the suns energy is produced | core |
the spin of a body on it's axis | rotation |
the path that a body follows as it travels around another body | orbit |
the motion of a body that travels around another body in space; one complete trip along an orbit | revolution |
a large cloud of gas and dust in interstellar space; where stars are born or where stars explode at the end of their lives | nebula |
the cloud of gas and dust that formed our solar system | solar nebula |