Question 1

The temperature of a star directly affects its

Accepted Answer

A)  mass.
B)  color.
C)  composition.
D)  age.E) B) and D)
F) B) and C)

Question 2

The duration of the sunspot cycle is about

Accepted Answer

A)  27 days.
B)  6 months.
C)  3 years.
D)  11 years.E) C) and D)
F) All of the above

Question 3

The less the mass of a main-sequence star, the

Accepted Answer

A)  lower its density.
B)  cooler it is.
C)  brighter it is.
D)  shorter its lifetime.E) A) and B)
F) B) and C)

Question 4

Stars at the lower end of the main sequence have

Accepted Answer

A)  high temperatures and large masses.
B)  high temperatures and small masses.
C)  low temperatures and large masses.
D)  low temperatures and small masses.E) B) and C)
F) All of the above D

Question 5

Which of the following can appear as disks with the help of a telescope?

Accepted Answer

A)  planets
B)  main-sequence stars
C)  red giants
D)  supernovasE) B) and C)
F) C) and D)

Question 6

A star whose spectral lines are shifted toward the red end of the spectrum

Accepted Answer

A)  has a magnetic field.
B)  is moving toward us.
C)  is moving away from us.
D)  is moving across our line of sight.E) None of the above
F) A) and B)

Question 7

Relatively few stars become

Accepted Answer

A)  members of the main sequence.
B)  red giants.
C)  white dwarfs.
D)  supernovas.E) B) and D)
F) A) and B) D

Question 8

Black holes are the remnants of

Accepted Answer

A)  stars with small masses.
B)  stars with large masses.
C)  white dwarfs.
D)  black dwarfs.E) A) and B)
F) None of the above

Question 9

The star nearest to the sun is approximately

Accepted Answer

A)  1 light-minute away.
B)  4 light-years away.
C)  300 light-years away.
D)  4000 light-years away.E) C) and D)
F) B) and C)

Question 10

What keeps light from escaping from a black hole is its

Accepted Answer

A)  strong electric field.
B)  strong magnetic field.
C)  strong gravitational field.
D)  absorbing atmosphere.E) B) and C)
F) C) and D) C

Question 11

The spectrum of a star can provide information of which one or more of the following?

Accepted Answer

A)  The star's magnetic field.
B)  The star's temperature.
C)  The star's relative motion toward or away from us.
D)  The star's composition.
E)  All of the above.F) A) and B)
G) A) and C)

Question 12

At the end of its period in the main sequence, a very heavy star

Accepted Answer

A)  breaks up into several smaller stars.
B)  cools down into a white dwarf.
C)  expands into a red giant.
D)  explodes into a supernova.E) A) and D)
F) All of the above

Question 13

Red giant stars

Accepted Answer

A)  are not very bright.
B)  have relatively low surface temperatures.
C)  represent the initial stage in a star's cycle.
D)  are among the densest objects in the universe.E) None of the above
F) B) and C)

Question 14

The temperature of the sun's photosphere is about

Accepted Answer

A)  600 K.
B)  6000 K.
C)  14 million K.
D)  14 billion K.E) B) and D)
F) None of the above

Question 15

Advantages of large reflecting telescopes include their ability to

Accepted Answer

A)  better resolve objects close together in the sky.
B)  gather more light from faint objects.
C)  be modified to correct for flickering images due to atmospheric turbulence.
D)  All of these choices.E) A) and C)
F) A) and B)

Question 16

Sunspots

Accepted Answer

A)  are hotter than the rest of the solar surface.
B)  are dark clouds floating in the solar atmosphere.
C)  occur at random intervals.
D)  are correlated with a number of terrestrial effects.E) None of the above
F) A) and D)

Question 17

Stars seem to twinkle because of

Accepted Answer

A)  variations in their brightnesses.
B)  variations in their colors.
C)  turbulent movements in their atmospheres.
D)  turbulent movements in the earth's atmosphere.E) A) and B)
F) All of the above

Question 18

The majority of main-sequence stars are

Accepted Answer

A)  blue.
B)  white.
C)  yellow.
D)  red.E) A) and B)
F) A) and D)

Question 19

A supernova explosion may leave behind a

Accepted Answer

A)  neutron star.
B)  white dwarf.
C)  red dwarf.
D)  red giant.E) A) and B)
F) All of the above

Question 20

A gamma-ray burst is a short, intense flood of gamma rays

Accepted Answer

A)  from the sun.
B)  from the black hole at the center of our galaxy.
C)  from a nearby neutron star.
D)  that may have caused biological extinctions in the past.E) B) and C)
F) B) and D)

Exam 18: The Stars

The temperature of a star directly affects its

Correct AnswerverifiedShow Answer

The duration of the sunspot cycle is about

Correct AnswerverifiedShow Answer

The less the mass of a main-sequence star, the

Correct AnswerverifiedShow Answer

Stars at the lower end of the main sequence have

Correct AnswerverifiedD

Which of the following can appear as disks with the help of a telescope?

Correct AnswerverifiedShow Answer

A star whose spectral lines are shifted toward the red end of the spectrum

Correct AnswerverifiedShow Answer

Relatively few stars become

Correct AnswerverifiedD

Black holes are the remnants of

Correct AnswerverifiedShow Answer

The star nearest to the sun is approximately

Correct AnswerverifiedShow Answer

What keeps light from escaping from a black hole is its

Correct AnswerverifiedC

The spectrum of a star can provide information of which one or more of the following?

Correct AnswerverifiedShow Answer

At the end of its period in the main sequence, a very heavy star

Correct AnswerverifiedShow Answer

Red giant stars

Correct AnswerverifiedShow Answer

The temperature of the sun's photosphere is about

Correct AnswerverifiedShow Answer

Advantages of large reflecting telescopes include their ability to

Correct AnswerverifiedShow Answer

Sunspots

Correct AnswerverifiedShow Answer

Stars seem to twinkle because of

Correct AnswerverifiedShow Answer

The majority of main-sequence stars are

Correct AnswerverifiedShow Answer

A supernova explosion may leave behind a

Correct AnswerverifiedShow Answer

A gamma-ray burst is a short, intense flood of gamma rays

Correct AnswerverifiedShow Answer

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D

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D

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C

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