Earth Science: Geology, the Environment, and the Universe

Section 2: Measuring the Stars

Measuring the Stars

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