Circle the best answer for each question.

1		Astronomers have a great deal of detailed information on thousands of stars because
			A)	of unmanned space probes to these stars
			B)	the stars are easily seen using the largest telescopes
			C)	all stars are exactly like the sun
			D)	of spectroscopic analysis
2		The latest generation of telescopes
			A)	utilize a single, large lens
			B)	utilize a number of individual mirrors linked to produce a single image
			C)	consist of a single, large mirror and a series of magnifying lenses
			D)	refract light through a lens
3		The color of a star depends on its
			A)	composition
			B)	temperature
			C)	period of rotation
			D)	distance from the earth
4		The composition of a star can be determined by examining its
			A)	color
			B)	magnetic field
			C)	spectrum
			D)	sunspots
5		A star moving toward the earth has a spectrum whose lines are
			A)	continuous with no gaps in the band of color
			B)	blurred
			C)	doppler-shifted toward the violet end of the spectrum
			D)	doppler-shifted toward the red end of the spectrum
6		The sun consists largely of
			A)	hydrogen and helium
			B)	oxygen and nitrogen
			C)	carbon and sodium
			D)	neon and argon
7		Which one of the following statements about sunspots is correct?
			A)	The sunspot cycle is about 4 years long.
			B)	Magnetic fields are associated with sunspots.
			C)	Sunspots appear as bright patches on the sun's surface.
			D)	Sunspots are usually clustered near the sun's equator.
8		The American astronomer Walter Adams discovered a way to determine the intrinsic brightness of a star by examining the star's
			A)	distance from the earth
			B)	sunspot activity
			C)	spectrum
			D)	size
9		The American astronomer Henrietta Leavitt discovered that the intrinsic brightness of a Cepheid variable is related to its
			A)	period of fluctuation
			B)	color
			C)	period of rotation
			D)	doppler shift
10		Which statement best describes a white dwarf?
			A)	High mass and volume, low density
			B)	Cool surface, high total radiation
			C)	Hot surface, low density, small size
			D)	Hot surface, low total radiation, high density
11		The sun is
			A)	at the beginning of its lifetime in the main sequence
			B)	near the end of its lifetime in the main sequence
			C)	about halfway through its lifetime in the main sequence
			D)	about ready to begin its lifetime as a main sequence star
12		Pulsars
			A)	have a total energy output much less than that of the sun
			B)	are rapidly spinning black holes
			C)	have weak magnetic fields
			D)	have very small diameters