Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
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1.
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A star that has a blue-shifted spectrum is most likely moving
a. | toward the earth. | c. | around the Milky Way Galaxy. | b. | away from the
sun. | d. | toward a black
hole. |
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2.
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If star A is farther from Earth than star B, but both stars have the same
absolute magnitude, what is true about their apparent magnitude?
a. | Both stars have the same apparent magnitude. | b. | Star A has the
greater apparent magnitude. | c. | Star B has the greater apparent
magnitude. | d. | Apparent magnitude is not related to distance. |
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3.
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According to Hubble’s law, galaxies are retreating at a speed that is
proportional to their ____.
a. | orientation | c. | galactic position | b. | distance | d. | mass |
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4.
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Which stage in stellar evolution is the longest?
a. | supergiant | c. | black hole | b. | neutron star | d. | main-sequence |
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5.
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According to the big bang theory, the universe began about ____.
a. | 4.5 billion years ago | c. | 49.6 billion years ago | b. | 13.7 billion years
ago | d. | 130 billion years
ago |
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6.
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About 90 percent of stars on the H-R diagram are ____.
a. | supergiants | c. | white dwarfs | b. | main-sequence stars | d. | black holes |
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7.
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Which of the following is NOT a type of galaxy?
a. | nebular | c. | spiral | b. | irregular | d. | elliptical |
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8.
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Which force is most responsible for the formation of a star?
a. | gravity | c. | interstellar force | b. | nuclear force | d. | electromagnetic
force |
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9.
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About 60 percent of all known galaxies are classified as ____.
a. | spiral galaxies | c. | irregular galaxies | b. | elliptical galaxies | d. | binary systems |
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10.
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What will be the final stage in the sun’s life cycle?
a. | white dwarf | c. | planetary nebula | b. | red giant | d. | black dwarf |
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