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Star Life Cycle

8th Grade Science Vocabulary on Life Cycle of Stars

TermDefinition
giant star After a main sequence star has consumed all its hydrogen, the star expands from 10 to 100 times its former size, becoming cooler and red, but brighter.
supergiant star After a main sequence star has consumed all its hydrogen, the star expands to 1000 times its size, becoming cooler and red, but brighter.
dwarf star the final stage of life of a small-to-medium mass star; very small and hot
supernova the explosive death of a massive star, reaching a brightness of 100 million suns
neutron star Composed mainly of neutrons, it is left behind after a supernova. Very dense; mass of 3 suns in diameter of 20 km.
black hole Left behind after a supernova of the largest stars. The star's core collapses, and its huge gravity traps everything that comes close, even light.
pulsar a special type of neutron star. It emits (sends out) a beam of radiation that sweeps across Earth as it spins.
planetary nebula the outer layers of a star that are pushed out when a star goes from red giant to white dwarf
nebula cloud of dust and gas where stars may be "born"
red stars coolest color of stars
blue stars hottest color of stars
main sequence the part of the H-R diagram that contains most of the stars in the universe
stars factories for new elements; they convert hydrogen gas to all the other elements on the periodic table
telescopes used to study the visible light, radio waves, infrared light, and X-rays that come from the stars
sun drives Earth's winds and surface ocean currents, fuels photosynthesis, and keeps our planet warm
Created by: foremanscience
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