click below
click below
Normal Size Small Size show me how
8th- The Sun
| Term | Definition |
|---|---|
| core | innermost layer of the Sun where thermonuclear fusion takes place |
| thermonuclear fusion | the process by which the Sun creates energy by turning hydrogen into helium |
| photosphere | innermost part of the Sun's atmosphere but visible to us; 500 km thick, made of hydrogen gas |
| chromosphere | inner atmosphere; region of glowing red gas |
| corona | outer atmosphere, thin layer of gas that is very deep; faint halo of light around the Sun during an eclipse |
| sunspots | cooler, darker areas that last 2 weeks the occur in 11 year cycles; produce solar flares |
| solar flares | hot gases that erupt from the surface sending ions and radiation into space |
| solar wind | a continuous flow of electrons and protons from the Sun into space; causes the auroras |
| solar maximum | peak of 11 year cycle during which the Sun's magnetic poles reverse and release enormous amounts of energy |
| auroras | gases in Earth's upper atmosphere glow with various colors when excited by the solar wind |
| coronal mass ejections (CMEs) | eruptions of high energy particles that travel less than speed of light so they take a few hours to reach us |
| solar prominence | streamers of hot gases arching above photosphere that last for several hours; do not disrupt Earth's communications since they loop back down toward the Sun |
| magnetosphere | magnetic field that protects Earth from solar eruptions |