Question 1

Binary (double)stars can be detected by

Accepted Answer

A)  being seen as two separate stars with a telescope. 
B)  one star traveling a wiggly proper motion path across the sky. 
C)  one star dimming abruptly as another passes in front of it. 
D)  pairs of absorption lines seen in the spectrum of what appears to be one star. 
E)  all of the above 
A)  being seen as two separate stars with a telescope. 
B)  one star traveling a wiggly proper motion path across the sky. 
C)  one star dimming abruptly as another passes in front of it. 
D)  pairs of absorption lines seen in the spectrum of what appears to be one star. 
E)  all of the above E

Question 2

The method of spectroscopic parallax cannot be applied to stars beyond about 100 pc.

Accepted Answer

A) True 
 B)False  False

Question 3

The absorption lines in the ultraviolet portion of the spectrum of a star that are produced by hydrogen are from the

Accepted Answer

A)  Lyman series. 
B)  Balmer series. 
C)  Paschen series. 
D)  isotopes of hydrogen. 
E)  ions of hydrogen. 
A)  Lyman series. 
B)  Balmer series. 
C)  Paschen series. 
D)  isotopes of hydrogen. 
E)  ions of hydrogen. A

Question 4

If a star is twice as hot as the sun and only half the sun's diameter,it will be less luminous than the sun.

Accepted Answer

A) True 
 B)False

Question 5

White dwarfs have such a low luminosity that even the nearest white dwarfs are not visible to the naked eye.

Accepted Answer

A) True 
 B)False

Question 6

The star Sadir has an absolute magnitude of -5.3,and the absolute bolometric magnitude of the sun is +4.7.Based on this information,which of the following statements is true?

Accepted Answer

A)  Sadir has a greater surface temperature than the sun. 
B)  Sadir has a larger diameter than the sun. 
C)  Sadir is 10,000 times more luminous than the sun. 
D)  Sadir is 100 parsecs from Earth. 
E)  all of the above 
A)  Sadir has a greater surface temperature than the sun. 
B)  Sadir has a larger diameter than the sun. 
C)  Sadir is 10,000 times more luminous than the sun. 
D)  Sadir is 100 parsecs from Earth. 
E)  all of the above

Question 7

Most stars on the H-R diagram are on the ____________________.

Accepted Answer

The answer of Most stars on the H-R diagram are...

Question 8

Sheat is an M2 II star.Based on this information,which of the following are true?

Accepted Answer

A)  I & II 
B)  II & IV 
C)  II,III,& IV 
D)  I,II,& III 
E)  I,II,III,& IV 
A)  I & II 
B)  II & IV 
C)  II,III,& IV 
D)  I,II,& III 
E)  I,II,III,& IV

Question 9

If you compare two stars,

Accepted Answer

A)  the one with the larger radius will always have the greater luminosity. 
B)  the one with the higher surface temperature will always have the greater luminosity. 
C)  the one with the smaller absolute magnitude will always have the greater luminosity. 
D)  the one with the larger surface area has the greater energy flux from its surface. 
A)  the one with the larger radius will always have the greater luminosity. 
B)  the one with the higher surface temperature will always have the greater luminosity. 
C)  the one with the smaller absolute magnitude will always have the greater luminosity. 
D)  the one with the larger surface area has the greater energy flux from its surface.

Question 10

The spectra of the coolest stars contain strong absorption features (or lines)of

Accepted Answer

A)  TiO molecules 
B)  ionized helium 
C)  helium 
D)  hydrogen. 
E)  All of the above 
A)  TiO molecules 
B)  ionized helium 
C)  helium 
D)  hydrogen. 
E)  All of the above

Question 11

The absorption lines in the infrared portion of the spectrum of a star that are produced by hydrogen are from the

Accepted Answer

A)  Lyman series. 
B)  Balmer series. 
C)  Paschen series. 
D)  isotopes of hydrogen. 
E)  ions of hydrogen. 
A)  Lyman series. 
B)  Balmer series. 
C)  Paschen series. 
D)  isotopes of hydrogen. 
E)  ions of hydrogen.

Question 12

Stars in the upper right part of the Hertzsprung-Russell diagram are always ____ when compared to stars near the middle of the diagram.

Accepted Answer

A)  cooler 
B)  brighter as seen from Earth. 
C)  larger. 
D)  smaller. 
E)  more massive. 
A)  cooler 
B)  brighter as seen from Earth. 
C)  larger. 
D)  smaller. 
E)  more massive.

Question 13

Use the following chart to answer the questions below:
   
-Which star in Table 9-1 is the closest to Earth? Note that the distance may be calculated if it is not given explicitly.

Accepted Answer

A)  65 Tau 
B)  HR 4621 
C)  ($\alpha$ Pic) 
D)  58 Ori 
E)  HR 2491 
A)  65 Tau 
B)  HR 4621 
C)  ($\alpha$ Pic) 
D)  58 Ori 
E)  HR 2491

Question 14

The luminosity of a star is the total amount of energy it radiates each second.

Accepted Answer

A) True 
 B)False

Question 15

Groombridge 34 is an M1 V star.Based on this information,which of the following are true?

Accepted Answer

A)  I & II 
B)  II & IV 
C)  I & IV 
D)  I & III 
E)  II & III 
A)  I & II 
B)  II & IV 
C)  I & IV 
D)  I & III 
E)  II & III

Question 16

The most common stars are

Accepted Answer

A)  supergiants. 
B)  giants. 
C)  upper main sequence stars. 
D)  white dwarfs. 
E)  lower main sequence stars. 
A)  supergiants. 
B)  giants. 
C)  upper main sequence stars. 
D)  white dwarfs. 
E)  lower main sequence stars.

Question 17

The largest of the red stars are the ____________________ stars.

Accepted Answer

The answer of The largest of the red stars are...

Question 18

If a star with an absolute magnitude of -5 has an apparent magnitude of +5,then its distance is

Accepted Answer

A)  1 pc. 
B)  10 pc. 
C)  100 pc. 
D)  1000 pc. 
E)  10,000 pc. 
A)  1 pc. 
B)  10 pc. 
C)  100 pc. 
D)  1000 pc. 
E)  10,000 pc.

Question 19

The best true sample of the true members of different stars consists of

Accepted Answer

A)  stars that appear brightest in the sky to an observer on the Earth. 
B)  all of the stars within our solar system. 
C)  all the stars within a given distance from Earth. 
A)  stars that appear brightest in the sky to an observer on the Earth. 
B)  all of the stars within our solar system. 
C)  all the stars within a given distance from Earth.

Question 20

We know the white dwarf star Sirius B has a mass comparable to the Sun because of

Accepted Answer

A)  its measured color 
B)  its measured temperature compared to Sirius A 
C)  it is part of binary star system with Sirius A. 
A)  its measured color 
B)  its measured temperature compared to Sirius A 
C)  it is part of binary star system with Sirius A.

Exam 9: The Family of Stars

Binary (double)stars can be detected by

The method of spectroscopic parallax cannot be applied to stars beyond about 100 pc.

The absorption lines in the ultraviolet portion of the spectrum of a star that are produced by hydrogen are from the

If a star is twice as hot as the sun and only half the sun's diameter,it will be less luminous than the sun.

White dwarfs have such a low luminosity that even the nearest white dwarfs are not visible to the naked eye.

The star Sadir has an absolute magnitude of -5.3,and the absolute bolometric magnitude of the sun is +4.7.Based on this information,which of the following statements is true?

Most stars on the H-R diagram are on the ____________________.

Sheat is an M2 II star.Based on this information,which of the following are true?

If you compare two stars,

The spectra of the coolest stars contain strong absorption features (or lines)of

The absorption lines in the infrared portion of the spectrum of a star that are produced by hydrogen are from the

Stars in the upper right part of the Hertzsprung-Russell diagram are always ____ when compared to stars near the middle of the diagram.

Use the following chart to answer the questions below: -Which star in Table 9-1 is the closest to Earth? Note that the distance may be calculated if it is not given explicitly.

The luminosity of a star is the total amount of energy it radiates each second.

Groombridge 34 is an M1 V star.Based on this information,which of the following are true?

The most common stars are

The largest of the red stars are the ____________________ stars.

If a star with an absolute magnitude of -5 has an apparent magnitude of +5,then its distance is

The best true sample of the true members of different stars consists of

We know the white dwarf star Sirius B has a mass comparable to the Sun because of

Here and Now

A Users Guide to the Sky

Cycles of the Moon

The Origin of Modern Astronomy

Gravity

Light and Telescopes

Atoms and Spectra

The Sun

The Interstellar Medium

The Formation and Structure of Stars

Stellar Evolution

The Deaths of Stars

Neutron Stars and Black Holes

The Milky Way Galaxy

Galaxies

Active Galaxies and Supermassive Black Holes

Modern Cosmology

The Origin of the Solar System

Earth: the Standard of Comparative Planetology

The Moon and Mercury: Comparing Airless Worlds

Venus and Mars

Jupiter and Saturn

Uranus,neptune,and the Kuiper Belt

Meteorites,asteroids,and Comets

Astrobiology: Life on Other Worlds

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