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Science Final
Ch. 15 Vocabulary
7
Science
8th Grade
05/21/2009

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Term
spectrum
Definition
the band of colors produced when white light passes through a prism
Term
apparent magnitude
Definition
the brightness of a star as seen from earth
Term
absolute magnitude
Definition
the brightness that a star would have at a distance of 32.6 light-years from earth
Term
light-year
Definition
the distance that light travels in one year; about 9.46 kilometers
Term
parallax
Definition
an apparent shift in the position of an object when viewed from different locations
Term
main sequence
Definition
the location on the H-R diagram where most stars lie; it had a diagonal pattern from the lower right (low temperature and luminosity) to the upper left (high temperature and luminosity)
Term
H-R diagram
Definition
Hertzsprung-Russel diagram, a graph that shows the relationship between
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