Question 1

The stars that have the largest radii are classified as supergiants.

Accepted Answer

A) True 
 B)False

Question 2

Stars A and B appear equally bright,but star A is twice as far away from us as star B.Which of the following is true?

Accepted Answer

A)  Star A is twice as luminous as star B. 
B)  Star A is four times as luminous as star B. 
C)  Star B is twice as luminous as star A. 
D)  Star B is four times as luminous as star B. 
A)  Star A is twice as luminous as star B. 
B)  Star A is four times as luminous as star B. 
C)  Star B is twice as luminous as star A. 
D)  Star B is four times as luminous as star B.

Question 3

The one property of a main-sequence star that determines all its other properties is its

Accepted Answer

A)  luminosity. 
B)  mass. 
C)  temperature. 
D)  spectral type. 
A)  luminosity. 
B)  mass. 
C)  temperature. 
D)  spectral type.

Question 4

The Hertzsprung-Russell Diagram is

Accepted Answer

A)  a graph of mass versus brightness for stars. 
B)  a graph of size versus mass for stars. 
C)  a graph of luminosity versus temperature for stars. 
D)  a graph of mass versus spectral type for stars. 
A)  a graph of mass versus brightness for stars. 
B)  a graph of size versus mass for stars. 
C)  a graph of luminosity versus temperature for stars. 
D)  a graph of mass versus spectral type for stars.

Question 5

On a typical H-R diagram,where are the largest stars located?

Accepted Answer

A)  In the upper left corner 
B)  In the upper right corner 
C)  In the lower left corner 
D)  In the lower right corner 
A)  In the upper left corner 
B)  In the upper right corner 
C)  In the lower left corner 
D)  In the lower right corner

Question 6

Among main-sequence stars,the most massive stars are more luminous,redder,cooler,and have larger radii than less massive stars.

Accepted Answer

A) True 
 B)False

Question 7

The absolute magnitude of a star is a measure of its luminosity.

Accepted Answer

A) True 
 B)False

Question 8

What is the main property of a main-sequence star that determines all its other properties?

Accepted Answer

The star's mass has

Question 9

You observe a binary star system and find that star 1 has a velocity of 10 m/s while star 2 has a velocity of 35 m/s.What is the ratio of masses of the two stars   ?

Accepted Answer

The ratio of masses of stars i

Question 10

We can measure the luminosity of a star just from its color.

Accepted Answer

A) True 
 B)False

The stars that have the largest radii are classified as supergiants.

Stars A and B appear equally bright,but star A is twice as far away from us as star B.Which of the following is true?

The one property of a main-sequence star that determines all its other properties is its

The Hertzsprung-Russell Diagram is

On a typical H-R diagram,where are the largest stars located?

Among main-sequence stars,the most massive stars are more luminous,redder,cooler,and have larger radii than less massive stars.

The absolute magnitude of a star is a measure of its luminosity.

What is the main property of a main-sequence star that determines all its other properties?

You observe a binary star system and find that star 1 has a velocity of 10 m/s while star 2 has a velocity of 35 m/s.What is the ratio of masses of the two stars ?

We can measure the luminosity of a star just from its color.

Why Learn Astronomy

Patterns in the Skymotions of Earth

Gravity and Orbitsa Celestial Ballet

Light

The Tools of the Astronomer

The Birth and Evolution of Planetary Systems

The Terrestrial Planets and Earths Moon

Atmospheres of the Terrestrial Planets

Worlds of Gas and Liquidthe Giant Planets

Gravity Is More Than Keplers Laws

Planetary Adornmentsmoons and Rings

Dwarf Planets and Small Solar System Bodies

A Run-Of-The-Mill G-Type Starour Sun

Star Formation and the Interstellar Medium

Stars in the Slow Lanelow-Mass Stellar Evolution

Live Fast,die Younghigh-Mass Stellar Evolution

Our Expanding Universe

Galaxies

The Milky Waya Normal Spiral Galaxy

Modern Cosmology

The Origin of Structure

Life

Filters

Exam 13: Taking the Measure of Stars

The stars that have the largest radii are classified as supergiants.

Stars A and B appear equally bright,but star A is twice as far away from us as star B.Which of the following is true?

The one property of a main-sequence star that determines all its other properties is its

The Hertzsprung-Russell Diagram is

On a typical H-R diagram,where are the largest stars located?

Among main-sequence stars,the most massive stars are more luminous,redder,cooler,and have larger radii than less massive stars.

The absolute magnitude of a star is a measure of its luminosity.

What is the main property of a main-sequence star that determines all its other properties?

You observe a binary star system and find that star 1 has a velocity of 10 m/s while star 2 has a velocity of 35 m/s.What is the ratio of masses of the two stars ?

We can measure the luminosity of a star just from its color.

Why Learn Astronomy

Patterns in the Skymotions of Earth

Gravity and Orbitsa Celestial Ballet

Light

The Tools of the Astronomer

The Birth and Evolution of Planetary Systems

The Terrestrial Planets and Earths Moon

Atmospheres of the Terrestrial Planets

Worlds of Gas and Liquidthe Giant Planets

Gravity Is More Than Keplers Laws

Planetary Adornmentsmoons and Rings

Dwarf Planets and Small Solar System Bodies

A Run-Of-The-Mill G-Type Starour Sun

Star Formation and the Interstellar Medium

Stars in the Slow Lanelow-Mass Stellar Evolution

Live Fast,die Younghigh-Mass Stellar Evolution

Our Expanding Universe

Galaxies

The Milky Waya Normal Spiral Galaxy

Modern Cosmology

The Origin of Structure

Life

Filters