Question 1

List the three types of binary stars.

Accepted Answer

visual binary, spect

Question 2

On the H-R diagram, lines of constant radius are illustrated as _____.

Accepted Answer

A)  sloping downward from right to left 
B)  sloping downward from left to right 
C)  running vertically on the right side 
D)  running horizontally on the top 
E)  moving in various direction depending on the type of star 
A)  sloping downward from right to left 
B)  sloping downward from left to right 
C)  running vertically on the right side 
D)  running horizontally on the top 
E)  moving in various direction depending on the type of star

Question 3

The Hertzsprung-Russell diagram can be labeled many different ways. Which coordinates CANNOT be used on an H-R diagram?

Accepted Answer

A)  luminosity versus spectral type 
B)  luminosity versus temperature 
C)  radius versus temperature 
D)  absolute magnitude versus temperature 
E)  luminosity versus color 
A)  luminosity versus spectral type 
B)  luminosity versus temperature 
C)  radius versus temperature 
D)  absolute magnitude versus temperature 
E)  luminosity versus color

Question 4

A supergiant star's radii may extend out to the _____.

Accepted Answer

A)  half the orbit of Mercury 
B)  orbit of Mercury 
C)  orbit of Venus 
D)  orbit of the Earth 
E)  orbit of Saturn 
A)  half the orbit of Mercury 
B)  orbit of Mercury 
C)  orbit of Venus 
D)  orbit of the Earth 
E)  orbit of Saturn

Question 5

On the H-R diagram, 90 percent of all stars are ____.

Accepted Answer

A)  either giant or supergiant stars 
B)  white dwarfs 
C)  main sequence stars 
D)  sred dwarfs 
E)  binary stars 
A)  either giant or supergiant stars 
B)  white dwarfs 
C)  main sequence stars 
D)  sred dwarfs 
E)  binary stars

Question 6

Our Sun's spectral temperature type is classified as a(n) ____ on the spectral sequence.

Accepted Answer

A)  O star 
B)  F star 
C)  G star 
D)  K star 
E)  M star 
A)  O star 
B)  F star 
C)  G star 
D)  K star 
E)  M star

Question 7

The luminosity of a star is the ____.

Accepted Answer

A)  total energy radiated by the star at 100 parsecs 
B)  total energy radiated by the star 
C)  total energy radiated by the star in one second 
D)  average energy radiated by the star in one month 
E)  average energy radiated by the star in one year 
A)  total energy radiated by the star at 100 parsecs 
B)  total energy radiated by the star 
C)  total energy radiated by the star in one second 
D)  average energy radiated by the star in one month 
E)  average energy radiated by the star in one year

Question 8

The most accurate way to determine the surface temperature of a star is to study the pattern of emission lines from various atoms.

Accepted Answer

A) True 
 B)False

Question 9

The luminosity (L) of a star is the total energy the star radiates in _______________.

Accepted Answer

One second

Question 10

Explain why the current spectral classification letters are all jumbled and not in alphabetical order.

Accepted Answer

The spectral classification sequence ori

List the three types of binary stars.

On the H-R diagram, lines of constant radius are illustrated as _____.

The Hertzsprung-Russell diagram can be labeled many different ways. Which coordinates CANNOT be used on an H-R diagram?

A supergiant star's radii may extend out to the _____.

On the H-R diagram, 90 percent of all stars are ____.

Our Sun's spectral temperature type is classified as a(n) ____ on the spectral sequence.

The luminosity of a star is the ____.

The most accurate way to determine the surface temperature of a star is to study the pattern of emission lines from various atoms.

The luminosity (L) of a star is the total energy the star radiates in _______________.

Explain why the current spectral classification letters are all jumbled and not in alphabetical order.

Here and Now

A Users Guide to the Sky

Moon Phases and Eclipses

Origins of Modern Astronomy

Gravity

Light and Telescopes

Atoms and Spectra

The Sun

The Interstellar Medium

Formation and Structure of Stars

Stellar Evolution

Deaths of Stars

Neutron Stars and Black Holes

The Milky Way Galaxy

Galaxies

Supermassive Black Holes and Active Galaxies

Modern Cosmology

Origin of the Solar System and Extrasolar Planets

Earth the Active Planet

The Moon and Mercury

Venus and Mars

Jupiter and Saturn

Uranus Neptune Pluto and the Kuiper Belt

Meteorites Asteroids and Comets

Astrobiology

Filters

Exam 9: The Family of Stars

List the three types of binary stars.

On the H-R diagram, lines of constant radius are illustrated as _____.

The Hertzsprung-Russell diagram can be labeled many different ways. Which coordinates CANNOT be used on an H-R diagram?

A supergiant star's radii may extend out to the _____.

On the H-R diagram, 90 percent of all stars are ____.

Our Sun's spectral temperature type is classified as a(n) ____ on the spectral sequence.

The luminosity of a star is the ____.

The most accurate way to determine the surface temperature of a star is to study the pattern of emission lines from various atoms.

The luminosity (L) of a star is the total energy the star radiates in _______________.

Explain why the current spectral classification letters are all jumbled and not in alphabetical order.

Here and Now

A Users Guide to the Sky

Moon Phases and Eclipses

Origins of Modern Astronomy

Gravity

Light and Telescopes

Atoms and Spectra

The Sun

The Interstellar Medium

Formation and Structure of Stars

Stellar Evolution

Deaths of Stars

Neutron Stars and Black Holes

The Milky Way Galaxy

Galaxies

Supermassive Black Holes and Active Galaxies

Modern Cosmology

Origin of the Solar System and Extrasolar Planets

Earth the Active Planet

The Moon and Mercury

Venus and Mars

Jupiter and Saturn

Uranus Neptune Pluto and the Kuiper Belt

Meteorites Asteroids and Comets

Astrobiology

Filters