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Section 2: The Sun: Our Very Own Star
Terms in this set (16)
forms the sun's outer atmosphere
a thin region below the corona only 30,000 km thick
the visible part of the sun that we can see from the Earth
a region about 200,000 km thick; where gases circulate
a very dense region about 300,000 km thick
at the center of the sun; where its energy is produced
a large ball of gas that is mostly made up of hydrogen and helium which is held together by gravity
a process by which two or more low mass nuclei fuse to form another nucleus
a very dense region where energy passes
where energy finally reaches
the visable surface of the sun
two hydrogen nuclei (protons) collide. One proton emits particles and energy and then becomes a neutron. The proton and neutron combine to produce a heavy form of hydrogen (deuterium)
Deuterium combines with another hydrogen nucleus to form a variety of helium called helium-3
Two helium-3 atoms then combine to form ordinary helium-4 which releases more energy and a pair of hydrogen nuclei
cool, dark spots of the photosphere of the sun
regions of extremely high temperature and brightness that develop on the sun's surface; when it erupts, it sends electrically charged particles into the solar system; usually associated with sunspots
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