Earth Science Geology, the Environment, and the Universe

Chapter 29: Stars

Chapter Tests Practice-English

1
What are dark spots on the Sun's photosphere called?
A)auroras
B)sunspots
C)solar winds
D)solar flares
2
According to the H-R diagram, what is the absolute magnitude of our sun?
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A)0
B)(+) 5
C)(+) 1
D)(+) 10
3
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
4
From what does a star form?
A)a main sequence
B)a spectrum
C)a binary
D)a nebula
5
From where on the Sun does the solar wind escape?
A)coronal holes
B)sunspots
C)solar flares
D)photosphere
6
Gas flows outward from the corona and forms the __________.
A)sunspot
B)aurora
C)solar wind
D)solar flare
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
How is the composition of a white dwarf determined?
A)by how many reaction phases it went through
B)by its luminosity
C)by the size of its planetary nebula
D)by the size of the supernova
9
The Sun contains __________ percent of all the mass in our solar system.
A)99
B)1
C)100
D)10
10
These 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
11
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 star's composition is known.
12
What two elements make up 98.4 percent of the Sun's composition?
A)hydrogen and carbon dioxide
B)hydrogen and nitrogen
C)oxygen and helium
D)oxygen and helium
13
Which spectrum could be used to identify the composition of a star?
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A)B
B)A
C)C
D)all of the above
14
Why do astronomers rely on computer models for an explanation of the Sun's interior?
A)to remove the effects of the solar wind
B)They need more than the observations of the interior.
C)The interior is only visible during a solar eclipse.
D)The interior can't be directly observed.
15
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.
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