Section #: 30.2
Measuring the Stars
Practice Test
1.
What is the disadvantage of absolute magnitude?
a.
It is only the apparent magnitude.
b.
It can't be calculated for the Sun.
c.
It can only be calculated if a stars distance is known.
d.
It can only be calculated if the stars composition is known.
Hint
2.
What causes the wavelength of a star's spectral lines to shift?
a.
the temperature of the star
b.
the composition of the star
c.
the apparent magnitude of the star
d.
motion between the star and the observer
Hint
3.
Mass, luminosity, temperature, and diameter of stars can be demonstrated on a __________.
a.
Hertzsprung-Russell diagram
b.
spectra
c.
main sequence
d.
Doppler shift
Hint
4.
A __________ is visible light arranged according to wavelength.
a.
spectrum
b.
auroras
c.
solar flare
d.
emission spectrum
Hint
5.
According to the H-R diagram, which are the most common stars.
a.
giants
b.
supergiants
c.
main sequence
d.
white dwarfs
Hint
6.
What are two stars that orbit a common center of mass called?
a.
a binary
b.
seasonal
c.
circumpolar
d.
a cluster
Hint
7.
According to the H-R diagram, what is the apparent magnitude of our sun?
a.
0
b.
+1
c.
+5
d.
+10
Hint
8.
The figures of constellations show ________.
a.
circumpolar constellations
b.
constellations seen all year round
c.
constellations only seen in specific seasons
d.
all of the above
Hint
9.
Constellations that can be seen all year long from a certain location are __________.
a.
binary
b.
seasonal
c.
circumpolar
d.
cluster
Hint
10.
Which spectrum is used to identify the composition of a star?
a.
A
b.
B
c.
C
d.
all of the above
Hint
11.
Why doesn't apparent magnitude actually measure the brightness of the star?
a.
It doesn't account for energy output.
b.
It doesn't account for composition.
c.
It doesn't account for distance.
d.
It doesn't account for temperature.
Hint
12.
Energy output from the surface of a star is called __________.
a.
apparent magnitude
b.
spectra
c.
luminosity
d.
absolute magnitude
Hint
13.
Groups of stars named after mythological characters, animals, or everyday objects are called __________.
a.
main sequence stars
b.
binary stars
c.
constellations
d.
coronal holes
Hint
14.
The difference of two stars' spectra is due to the difference of their __________.
a.
luminosity
b.
composition
c.
temperature
d.
apparent magnitude
Hint
15.
From Earth, stars appear to shift in position, which is called __________.
a.
circumpolar
b.
apparent magnitude
c.
parallax
d.
binary
Hint
