Ch 25 1/2 Question Preview (ID: 2016)


1/2.

A star with a surface temperature between 5000K and 6000K appears
a) blue
b) red
c) yellow
d) white

A light year is approximately
a) 9.5 trillion kms
b) 95 trillion kms
c) 150 million kms
d) 150 billion kms

The measure of a star's brightness is called its
a) magnitude
b) parallax
c) intensity
d) color index

Which magnitude would be associated iwth the brightest star
a) 15
b) 10
c) 5
d) -5

The difference in the brightness of two stars with the same surface temperature is attributable to their
a) densities
b) colors
c) ages
d) sizes

Which of the following is NOT a type of neburla
a) reflection
b) emission
c) spiral
d) dark

Aboaut 90 percent of stars in the HR diagram are
a) supergiants
b) main sequence stars
c) white dwarfs
d) black holes

Which main sequence stars are the most massive
a) red
b) orange
c) yellow
d) blue

Which main sequence stars are the least massive
a) red
b) orange
c) yellow
d) blue

Another name for the interstellar matter that will eventually form a star is
a) supernova
b) red giant
c) black hole
d) nebula

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