Earth Science Geology, the Environment, and the Universe

Chapter 29: Stars

Chapter Test Practice-English

1
What are the dark areas 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)corona
B)chromosphere
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
Which factor helps determine the composition of a white dwarf?
A)the number of reactions it went through
B)the magnitude of its luminosity
C)the size of its planetary nebula
D)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 are similar because they all contain the same ______ constellations.
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A)seasonal
B)circumpolar
C)northern
D)zodiac
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 star’s 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)hydrogen and oxygen
D)hydrogen and helium
13
Which spectrum(s) could be used to identify the composition of a star?
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A)A
B)B
C)C
D)A, B, C
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.
16
In which of the Sun's zones does hot gas rise and cool gas sink?
A)convection
B)radiation
C)corona
D)photosphere
17
Which of the Sun's layers is only visible when using special equipment or during a total solar eclipse?
A)chromosphere
B)corona
C)photosphere
D)radiation zone
18
A(n) __________ is visible light arranged according to wavelength.
A)emission spectrum
B)solar flare
C)spectrum
D)aurora
19
From Earth, stars appear to shift in position, which is called __________.
A)binary
B)apparent magnitude
C)parallax
D)circumpolar
20
The Sun is powered by nuclear reactions involving which of the following?
A)fusion of helium to form hydrogen
B)fission of helium to form hydrogen
C)fusion of hydrogen to form helium
D)fission of hydrogen to form helium
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