Question 1

The star named Sheat is of M2 II spectral type and luminosity class. 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 2

An M star is hotter than an O star.

Accepted Answer

A) True 
 B)False

Question 3

If two stars are emitting the same amount of light, the star that is farther will appear

Accepted Answer

A)  brighter. 
B)  dimmer. 
C)  redder. 
D)  bluer. 
E)  They will have the same brightness as seen from Earth. 
A)  brighter. 
B)  dimmer. 
C)  redder. 
D)  bluer. 
E)  They will have the same brightness as seen from Earth.

Question 4

Diagram 8-1
Use the H-R diagram below to answer the following question(s).  
-Which star in Diagram 8-1 is most like the sun?

Accepted Answer

A)  Alnilam 
B)  Antares 
C)  Arcturus 
D)  HR 5337 
E)  Sirius B 
A)  Alnilam 
B)  Antares 
C)  Arcturus 
D)  HR 5337 
E)  Sirius B

Question 5

In the H-R diagram, 90 percent of all stars are

Accepted Answer

A)  in the giant region. 
B)  in the supergiant region. 
C)  among the B stars. 
D)  among the G stars. 
E)  on the main sequence. 
A)  in the giant region. 
B)  in the supergiant region. 
C)  among the B stars. 
D)  among the G stars. 
E)  on the main sequence.

Question 6

The most accurate way to determine the surface temperature of a star is to study

Accepted Answer

A)  the pattern of absorption lines from various atoms. 
B)  the relative intensities of light measured through different photometric filters. 
C)  the peak wavelength of the star's continuous blackbody spectrum. 
D)  pattern of emission lines that are on the star's spectrum. 
A)  the pattern of absorption lines from various atoms. 
B)  the relative intensities of light measured through different photometric filters. 
C)  the peak wavelength of the star's continuous blackbody spectrum. 
D)  pattern of emission lines that are on the star's spectrum.

Question 7

Giant stars are members of luminosity class III.

Accepted Answer

A) True 
 B)False

Question 8

For stars on the main sequence, the luminosity can be estimated by the formula L = ____________________.

Accepted Answer

The answer of For stars on the main sequence, the...

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 densest stars in the H-R diagram are the white dwarfs.

Accepted Answer

A) True 
 B)False

Question 11

The mass of a visual binary pair of stars can be obtained from

Accepted Answer

A)  the time in years for them to orbit one another. 
B)  the size of their orbit. 
C)  their apparent magnitudes. 
D)  both A and B 
A)  the time in years for them to orbit one another. 
B)  the size of their orbit. 
C)  their apparent magnitudes. 
D)  both A and B

Question 12

Table 8-1
Use the chart below to answer the following question(s).
  
-From the data given,, which star in Table 8-1 has the greatest luminosity?

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 13

The absolute magnitude of a star is the apparent magnitude it would have if it were 10 pc from Earth.

Accepted Answer

A) True 
 B)False

Question 14

How does density divide the stars in the H-R diagram into three groups?

Accepted Answer

The answer of How does density divide the stars in...

Question 15

A star's luminosity depends only on the star's

Accepted Answer

A)  distance and diameter. 
B)  temperature and distance. 
C)  distance. 
D)  temperature and diameter. 
E)  apparent magnitude. 
A)  distance and diameter. 
B)  temperature and distance. 
C)  distance. 
D)  temperature and diameter. 
E)  apparent magnitude.

Question 16

The correct sequence of spectral type letters from hot on the left to cool on the right is

Accepted Answer

A)  M, K, G, F, A, B, O 
B)  O, B, A, F, G, K, M 
C)  G, K, M, F, O, B, A 
D)  A, B, O, F, G, K, M 
A)  M, K, G, F, A, B, O 
B)  O, B, A, F, G, K, M 
C)  G, K, M, F, O, B, A 
D)  A, B, O, F, G, K, M

Question 17

A star's apparent magnitude is a measure of ...

Accepted Answer

A)  how bright it appears to us if it is at its actual distance. 
B)  how bright it appears to us at a standard distance of 10 pc. 
C)  its energy output per second compared to the sun. 
D)  its mass in solar masses. 
E)  its surface temperature in Kelvin. 
A)  how bright it appears to us if it is at its actual distance. 
B)  how bright it appears to us at a standard distance of 10 pc. 
C)  its energy output per second compared to the sun. 
D)  its mass in solar masses. 
E)  its surface temperature in Kelvin.

Question 18

How do absolute visual magnitude and luminosity differ?

Accepted Answer

The answer of How do absolute visual magnitude and luminosity...

Question 19

Vega is an A0 V star. Based on this information, which of the following are true?

Accepted Answer

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

Question 20

Table 8-1
Use the chart below to answer the following question(s).
  
-From the data given, which star in Table 8-1 is the closest to Earth?

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

The star named Sheat is of M2 II spectral type and luminosity class. Based on this information, which of the following are true?

An M star is hotter than an O star.

If two stars are emitting the same amount of light, the star that is farther will appear

Diagram 8-1 Use the H-R diagram below to answer the following question(s). -Which star in Diagram 8-1 is most like the sun?

In the H-R diagram, 90 percent of all stars are

The most accurate way to determine the surface temperature of a star is to study

Giant stars are members of luminosity class III.

For stars on the main sequence, the luminosity can be estimated by the formula L = ____________________.

If you compare two stars,

The densest stars in the H-R diagram are the white dwarfs.

The mass of a visual binary pair of stars can be obtained from

Table 8-1 Use the chart below to answer the following question(s). -From the data given,, which star in Table 8-1 has the greatest luminosity?

The absolute magnitude of a star is the apparent magnitude it would have if it were 10 pc from Earth.

How does density divide the stars in the H-R diagram into three groups?

A star's luminosity depends only on the star's

The correct sequence of spectral type letters from hot on the left to cool on the right is

A star's apparent magnitude is a measure of ...

How do absolute visual magnitude and luminosity differ?

Vega is an A0 V star. Based on this information, which of the following are true?

Table 8-1 Use the chart below to answer the following question(s). -From the data given, which star in Table 8-1 is the closest to Earth?

Here and Now

A Users Guide to the Sky

Cycles of the Sun and Moon

The Origin of Modern Astronomy

Light and Telescopes

Atoms and Spectra

The Sun

The Formation and Structure of Stars

The Deaths of Stars

Neutron Stars and Black Holes

The Milky Way Galaxy

Galaxies: Normal and Active

Modern Cosmology

The Origin of the Solar System

Earth and Moon: Bases for Comparative Planetology

Mercury, Venus and Mars

The Outer Solar System

Meteorites, Asteroids, and Comets

Astrobiology: Life on Other Worlds

Filters

Exam 8: The Family of Stars

The star named Sheat is of M2 II spectral type and luminosity class. Based on this information, which of the following are true?

An M star is hotter than an O star.

If two stars are emitting the same amount of light, the star that is farther will appear

Diagram 8-1 Use the H-R diagram below to answer the following question(s). -Which star in Diagram 8-1 is most like the sun?

In the H-R diagram, 90 percent of all stars are

The most accurate way to determine the surface temperature of a star is to study

Giant stars are members of luminosity class III.

For stars on the main sequence, the luminosity can be estimated by the formula L = ____________________.

If you compare two stars,

The densest stars in the H-R diagram are the white dwarfs.

The mass of a visual binary pair of stars can be obtained from

Table 8-1 Use the chart below to answer the following question(s). -From the data given,, which star in Table 8-1 has the greatest luminosity?

The absolute magnitude of a star is the apparent magnitude it would have if it were 10 pc from Earth.

How does density divide the stars in the H-R diagram into three groups?

A star's luminosity depends only on the star's

The correct sequence of spectral type letters from hot on the left to cool on the right is

A star's apparent magnitude is a measure of ...

How do absolute visual magnitude and luminosity differ?

Vega is an A0 V star. Based on this information, which of the following are true?

Table 8-1 Use the chart below to answer the following question(s). -From the data given, which star in Table 8-1 is the closest to Earth?

Here and Now

A Users Guide to the Sky

Cycles of the Sun and Moon

The Origin of Modern Astronomy

Light and Telescopes

Atoms and Spectra

The Sun

The Formation and Structure of Stars

The Deaths of Stars

Neutron Stars and Black Holes

The Milky Way Galaxy

Galaxies: Normal and Active

Modern Cosmology

The Origin of the Solar System

Earth and Moon: Bases for Comparative Planetology

Mercury, Venus and Mars

The Outer Solar System

Meteorites, Asteroids, and Comets

Astrobiology: Life on Other Worlds

Filters