Question 1

All stars produce an absorption spectra.

Accepted Answer

A) True 
 B)False  True

Question 2

The least common type of star is a(n) ____.

Accepted Answer

A)  white dwarf 
B)  lower main sequence 
C)  upper main sequence 
D)  giant 
E)  supergiant 
A)  white dwarf 
B)  lower main sequence 
C)  upper main sequence 
D)  giant 
E)  supergiant C

Question 3

List the three types of binary stars.

Accepted Answer

visual binary, spectroscopic binary, eclipsing binary

Question 4

In the above, which figure represents stars with the longest main-sequence lifetimes? Note: (C) represents the entire main sequence while (D) and (E) represent only small parts of the main sequence.

Accepted Answer

A)  A 
B)  B 
C)  C 
D)  D 
E)  E 
A)  A 
B)  B 
C)  C 
D)  D 
E)  E

Question 5

Which star has the highest density (mass per unit volume)?

Accepted Answer

A)  white dwarf 
B)  main sequence 
C)  supergiant 
D)  red giant 
E)  regular giant 
A)  white dwarf 
B)  main sequence 
C)  supergiant 
D)  red giant 
E)  regular giant

Question 6

Star A has an apparent visual magnitude of +5 and an absolute visual magnitude of -4.   What is the distance to Star A?

Accepted Answer

The answer of Star A has an apparent visual magnitude...

Question 7

Remember Kepler's third law, which relates the period of revolution to the average distance to a planet.   How do we modify that law to use with binary stars?

Accepted Answer

A)  Add the total mass of the two stars. 
B)  Add Newton's Law of Gravitation. 
C)  Add Einstein's Law of Relativity. 
D)  Add the difference of their masses. 
E)  Add the distance between the two stars. 
A)  Add the total mass of the two stars. 
B)  Add Newton's Law of Gravitation. 
C)  Add Einstein's Law of Relativity. 
D)  Add the difference of their masses. 
E)  Add the distance between the two stars.

Question 8

How do astronomers determine the distance to stars that are farther than 100 parsecs away?

Accepted Answer

A)  measuring the shift of the stellar parallax 
B)  estimating a star's spectral type and comparing it to the spectroscopic parallax 
C)  subtracting absolute from apparent magnitudes 
D)  using trigonometry in the triangulation method 
E)  measuring the proper motion of a star 
A)  measuring the shift of the stellar parallax 
B)  estimating a star's spectral type and comparing it to the spectroscopic parallax 
C)  subtracting absolute from apparent magnitudes 
D)  using trigonometry in the triangulation method 
E)  measuring the proper motion of a star

Question 9

S tars of low luminosity will always have large positive absolute magnitude.

Accepted Answer

A) True 
 B)False

Question 10

The formula    can be used to calculate a star's _____.

Accepted Answer

A)  mass 
B)  distance 
C)  rotation speed 
D)  revolution period 
E)  diameter 
A)  mass 
B)  distance 
C)  rotation speed 
D)  revolution period 
E)  diameter

Question 11

The most common stars are _______________ stars.

Accepted Answer

lower-main

Question 12

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

Accepted Answer

A) True 
 B)False

Question 13

The stellar parallax limit for ground-based telescopes is accurate for stars closer than ____.

Accepted Answer

A)  10 parsecs 
B)  50 parsecs 
C)  100 parsecs 
D)  200 parsecs 
E)  500 parsecs 
A)  10 parsecs 
B)  50 parsecs 
C)  100 parsecs 
D)  200 parsecs 
E)  500 parsecs

Question 14

Briefly state or explain the mass-luminosity relation for stars.

Accepted Answer

The luminosity of a star is di

Question 15

The horizontal axis in the accompanying figure is labeled _____.

Accepted Answer

A)  temperature 
B)  radius 
C)  apparent magnitude 
D)  absolute magnitude 
E)  luminosity 
A)  temperature 
B)  radius 
C)  apparent magnitude 
D)  absolute magnitude 
E)  luminosity

Question 16

Th e apparen t magnitud e o f a sta r observe d fro m a distanc e o f 1 0 pc is called _____.

Accepted Answer

absolute v

Question 17

The least common stars are _______________ stars.

Accepted Answer

upper-main

Question 18

The vertical axis in the accompanying figure is labeled _____.

Accepted Answer

A)  temperature 
B)  radius 
C)  apparent visual magnitude 
D)  absolute visual magnitude 
E)  mass 
A)  temperature 
B)  radius 
C)  apparent visual magnitude 
D)  absolute visual magnitude 
E)  mass

Question 19

A star has a parallax angle of 0.019 seconds of arc.  How far away is this star from Earth?

Accepted Answer

The answer of A star has a parallax angle of...

Question 20

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

Exam 9: The Family of Stars

All stars produce an absorption spectra.

The least common type of star is a(n) ____.

List the three types of binary stars.

In the above, which figure represents stars with the longest main-sequence lifetimes? Note: (C) represents the entire main sequence while (D) and (E) represent only small parts of the main sequence.

Which star has the highest density (mass per unit volume)?

Star A has an apparent visual magnitude of +5 and an absolute visual magnitude of -4. What is the distance to Star A?

Remember Kepler's third law, which relates the period of revolution to the average distance to a planet. How do we modify that law to use with binary stars?

How do astronomers determine the distance to stars that are farther than 100 parsecs away?

S tars of low luminosity will always have large positive absolute magnitude.

The formula can be used to calculate a star's _____.

The most common stars are _______________ stars.

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

The stellar parallax limit for ground-based telescopes is accurate for stars closer than ____.

Briefly state or explain the mass-luminosity relation for stars.

The horizontal axis in the accompanying figure is labeled _____.

Th e apparen t magnitud e o f a sta r observe d fro m a distanc e o f 1 0 pc is called _____.

The least common stars are _______________ stars.

The vertical axis in the accompanying figure is labeled _____.

A star has a parallax angle of 0.019 seconds of arc. How far away is this star from Earth?

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

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