Question 1

What distance method did Edwin Hubble use to determine the distance to local galaxies?

Accepted Answer

A)  Hubble Law 
B)  Supernova observations 
C)  Period-luminosity relationship of variable stars 
D)  Parallax 
A)  Hubble Law 
B)  Supernova observations 
C)  Period-luminosity relationship of variable stars 
D)  Parallax C

Question 2

Elliptical galaxies are primarily made up of massive O and B stars.

Accepted Answer

A) True 
 B)False  False

Question 3

A tuning fork diagram is shown below.Which of the labeled figures represents an Sa galaxy?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  5 
A)  1 
B)  2 
C)  3 
D)  4 
E)  5 E

Question 4

When two galaxies collide,they pass through each other,and their stars almost never collide.

Accepted Answer

A) True 
 B)False

Question 5

If H equals 50 km/sec/Mpc,then a galaxy with a radial velocity of 50,000 km/sec will have a distance of about 1 Mpc.

Accepted Answer

A) True 
 B)False

Question 6

Most of the mass of a galaxy is contained in the

Accepted Answer

A)  massive O and B stars in the galaxy. 
B)  neutral hydrogen gas H I regions of the galaxy. 
C)  ionized hydrogen gas H II regions of the galaxy. 
D)  dark matter halo of the galaxy. 
E)  disk ofstars in the galaxy. 
A)  massive O and B stars in the galaxy. 
B)  neutral hydrogen gas H I regions of the galaxy. 
C)  ionized hydrogen gas H II regions of the galaxy. 
D)  dark matter halo of the galaxy. 
E)  disk ofstars in the galaxy.

Question 7

An irregular galaxy contains

Accepted Answer

A)  mostly lower-main sequence stars and giants. 
B)  mostly upper main sequence stars and giants. 
C)  mostly upper main sequence stars and gas and dust. 
D)  upper and lower main sequence stars and gas and dust. 
E)  mostly white dwarfs and supergiants. 
A)  mostly lower-main sequence stars and giants. 
B)  mostly upper main sequence stars and giants. 
C)  mostly upper main sequence stars and gas and dust. 
D)  upper and lower main sequence stars and gas and dust. 
E)  mostly white dwarfs and supergiants.

Question 8

Which of the following could NOT be used as a distance indicator for galaxies?

Accepted Answer

A)  large globular clusters 
B)  Planets in our own Solar System 
C)  Supernovae 
D)  Cepheid variable stars 
E)  Wrong.All of these could be used 
A)  large globular clusters 
B)  Planets in our own Solar System 
C)  Supernovae 
D)  Cepheid variable stars 
E)  Wrong.All of these could be used

Question 9

When a large galaxy collides with a small galaxy,the smaller galaxy may be pulled apart by tidal forces.

Accepted Answer

A) True 
 B)False

Question 10

____________________ clusters of galaxies contain closely spaced galaxies and often contain giant elliptical galaxies and a hot intergalactic medium

Accepted Answer

The answer of ____________________ clusters of galaxies contain closely spaced...

Question 11

The dark matter in galaxies has been hypothesized to be composed of

Accepted Answer

A)  neutral hydrogen clouds. 
B)  dust particles. 
C)  weakly interacting massive particles. 
D)  H II regions of glowing hydorgen gas. 
E)  all of the above 
A)  neutral hydrogen clouds. 
B)  dust particles. 
C)  weakly interacting massive particles. 
D)  H II regions of glowing hydorgen gas. 
E)  all of the above

Question 12

The rotation curve of a galaxy (orbital speed versus distance)can be used to determine

Accepted Answer

A)  the colors of hot young stars in the galaxy. 
B)  the elements which make up the galaxy. 
C)  the direction in the sky of the galaxy. 
D)  the age of the galaxy. 
E)  the mass of the galaxy. 
A)  the colors of hot young stars in the galaxy. 
B)  the elements which make up the galaxy. 
C)  the direction in the sky of the galaxy. 
D)  the age of the galaxy. 
E)  the mass of the galaxy.

Question 13

Astronomers now speculate that a galaxy's shape depends on all of the following EXCEPT

Accepted Answer

A)  the rate of star formation. 
B)  the history of past collisions. 
C)  the mass. 
D)  its direction in the sky as seen from Earth 
E)  All of the above are important in determining a galaxy's shape. 
A)  the rate of star formation. 
B)  the history of past collisions. 
C)  the mass. 
D)  its direction in the sky as seen from Earth 
E)  All of the above are important in determining a galaxy's shape.

Question 14

We should expect galaxies to collide with each other fairly often because

Accepted Answer

A)  a galaxy's size is comparable to (but smaller than)the average distance between galaxies. 
B)  galaxies contain large amounts of neutral hydrogen. 
C)  galaxies occur in clusters. 
D)  a and c 
E)  none of the above 
A)  a galaxy's size is comparable to (but smaller than)the average distance between galaxies. 
B)  galaxies contain large amounts of neutral hydrogen. 
C)  galaxies occur in clusters. 
D)  a and c 
E)  none of the above

Question 15

An elliptical galaxy could

Accepted Answer

A)  evolve into an irregular galaxy when it has used up all of its gas and dust. 
B)  be formed from the collision and merger of spiral galaxies. 
C)  evolve from a single spiral galaxy when the spiral has used up all of its gas and dust. 
D)  become a solar system some day. 
E)  be at the center of our Solar System 
A)  evolve into an irregular galaxy when it has used up all of its gas and dust. 
B)  be formed from the collision and merger of spiral galaxies. 
C)  evolve from a single spiral galaxy when the spiral has used up all of its gas and dust. 
D)  become a solar system some day. 
E)  be at the center of our Solar System

Question 16

The units on the Hubble constant are ____________________.

Accepted Answer

The answer of The units on the Hubble constant are...

Question 17

What is the primary factor in determining the classification for an elliptical galaxy?

Accepted Answer

A)  Size 
B)  Shape 
C)  Mass 
D)  Color 
A)  Size 
B)  Shape 
C)  Mass 
D)  Color

Question 18

____________________ galaxies have a definite disk component but contain no evidence of spiral pattern,few hot young stars,and little gas and dust.

Accepted Answer

The answer of ____________________ galaxies have a definite disk component...

Question 19

An E galaxy contains

Accepted Answer

A)  mostly lower-main sequence stars and giants. 
B)  mostly upper main sequence stars and giants. 
C)  mostly upper main sequence stars and gas and dust. 
D)  roughly equal numbers of upper and lower main sequence stars. 
E)  mostly white dwarfs and supergiants. 
A)  mostly lower-main sequence stars and giants. 
B)  mostly upper main sequence stars and giants. 
C)  mostly upper main sequence stars and gas and dust. 
D)  roughly equal numbers of upper and lower main sequence stars. 
E)  mostly white dwarfs and supergiants.

Question 20

The most massive galaxies are

Accepted Answer

A)  spiral galaxies. 
B)  giant elliptical galaxies. 
C)  dwarf elliptical galaxies. 
A)  spiral galaxies. 
B)  giant elliptical galaxies. 
C)  dwarf elliptical galaxies.

Exam 16: Galaxies

What distance method did Edwin Hubble use to determine the distance to local galaxies?

Elliptical galaxies are primarily made up of massive O and B stars.

A tuning fork diagram is shown below.Which of the labeled figures represents an Sa galaxy?

When two galaxies collide,they pass through each other,and their stars almost never collide.

If H equals 50 km/sec/Mpc,then a galaxy with a radial velocity of 50,000 km/sec will have a distance of about 1 Mpc.

Most of the mass of a galaxy is contained in the

An irregular galaxy contains

Which of the following could NOT be used as a distance indicator for galaxies?

When a large galaxy collides with a small galaxy,the smaller galaxy may be pulled apart by tidal forces.

____________________ clusters of galaxies contain closely spaced galaxies and often contain giant elliptical galaxies and a hot intergalactic medium

The dark matter in galaxies has been hypothesized to be composed of

The rotation curve of a galaxy (orbital speed versus distance)can be used to determine

Astronomers now speculate that a galaxy's shape depends on all of the following EXCEPT

We should expect galaxies to collide with each other fairly often because

An elliptical galaxy could

The units on the Hubble constant are ____________________.

What is the primary factor in determining the classification for an elliptical galaxy?

____________________ galaxies have a definite disk component but contain no evidence of spiral pattern,few hot young stars,and little gas and dust.

An E galaxy contains

The most massive galaxies are

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 Family of Stars

The Interstellar Medium

The Formation and Structure of Stars

Stellar Evolution

The Deaths of Stars

Neutron Stars and Black Holes

The Milky Way Galaxy

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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