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Chapter 21 Review

Greeksassigned brightness to stars
Apparent magnitudebrightness as it appears
Luminositytrue brightness
Hydrogen fusionstar energy production
Photospheresurface of the sun
Coronasun's layer only seen during an eclipse
Solar windmoving solar particles in space
Solar flarebright spot emitting energy on sun's surface
Sunspotdark, cooler area on sun's surface
Light yeardistance light travels in one earth revolution
Proxima Centauriclosest star to our solar system
4.2 light yearsdistance to Proxima Centauri
Black holecollapsed massive remnant of a supernova
Neutron starpulsar
Nebuladust & gases in space
White dwarfsmallest remnant of a star
H-R Diagramgraph & grouping of all stars
Super giantlargest of all stars
Giant2nd largest of all stars
Main sequence90% of all stars are this kind
Clustersstar organizations orbiting the galaxy
Constellationsstars organized into named areas in the galaxy
Gravityattracts all mater
Milky Wayour galaxy
Solar spectrumROYGBIV
Absorption spectrumlight wavelengths absorbed by elements
Emission spectrumlight wavelengths emitted in thin lines
Violethighest energy light wavelength
Redlowest energy light wavelength
OBAFGKMstar groups
Doppler effectphenomenon related to movement of object
Hottest star colorBlue
onebrightest Greek star magnitude
sixmost dim Greek star magnitude

Physical Science
Jinks Middle School
Panama City, FL

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