Question 1

Dark,unknown forms of matter appear to make up about what fraction of the mass of a typical rich cluster of galaxies?

Accepted Answer

A)  one half 
B)  90% 
C)  much less than 1% 
D)  10% 
A)  one half 
B)  90% 
C)  much less than 1% 
D)  10%

Question 2

The temperature of the hot intergalactic gas that results from the merger of galaxies can range from 300,000 to 5 million K.What is the BEST electromagnetic radiation range in which to view this hot gas?

Accepted Answer

A)  X-ray 
B)  visible 
C)  infrared 
D)  radio 
A)  X-ray 
B)  visible 
C)  infrared 
D)  radio

Question 3

The expansion of the universe takes place:

Accepted Answer

A)  only over distances about the size of a galaxy or larger; consequently, the Milky Way Galaxy expands, but the solar system does not. 
B)  only between objects separated by a vacuum; as a result, our bodies do not expand, but the Earth-Moon system does. 
C)  between all objects, even between the atoms in our bodies, although the expansion of a person is too small to be measured reliably. 
D)  primarily in the huge voids between clusters of galaxies. "Small" objects like galaxies or Earth do not expand. 
A)  only over distances about the size of a galaxy or larger; consequently, the Milky Way Galaxy expands, but the solar system does not. 
B)  only between objects separated by a vacuum; as a result, our bodies do not expand, but the Earth-Moon system does. 
C)  between all objects, even between the atoms in our bodies, although the expansion of a person is too small to be measured reliably. 
D)  primarily in the huge voids between clusters of galaxies. "Small" objects like galaxies or Earth do not expand.

Question 4

The major features of our Milky Way Galaxy have been found to include all of the following EXCEPT ONE.Which is the exception?

Accepted Answer

A)  more than one hundred billion stars 
B)  a bar of stars running through the center 
C)  a spherical symmetry 
D)  spiral arms 
A)  more than one hundred billion stars 
B)  a bar of stars running through the center 
C)  a spherical symmetry 
D)  spiral arms

Question 5

How many barred spiral galaxies are there compared with ordinary spiral galaxies?

Accepted Answer

A)  There are about half as many barred spirals as there are ordinary spirals. 
B)  There are about twice as many barred spirals as there are ordinary spirals. 
C)  About one in ten spiral galaxies contains a bar. 
D)  The numbers are essentially equal. 
A)  There are about half as many barred spirals as there are ordinary spirals. 
B)  There are about twice as many barred spirals as there are ordinary spirals. 
C)  About one in ten spiral galaxies contains a bar. 
D)  The numbers are essentially equal.

Dark,unknown forms of matter appear to make up about what fraction of the mass of a typical rich cluster of galaxies?

The temperature of the hot intergalactic gas that results from the merger of galaxies can range from 300,000 to 5 million K.What is the BEST electromagnetic radiation range in which to view this hot gas?

The expansion of the universe takes place:

The major features of our Milky Way Galaxy have been found to include all of the following EXCEPT ONE.Which is the exception?

How many barred spiral galaxies are there compared with ordinary spiral galaxies?

Discovering the Night Sky

Gravitation and the Waltz of the Planets

Light and Telescopes

Formation of the Solar System and Other Planetary Systems

Exoplanets

The Terrestrial Planets and Their Moons

The Outer Planets and Their Moons

Vagabonds of the Solar System

The Sun: Our Extraordinary Ordinary Star

Characterizing Stars

The Lives of the Stars From Birth Through Middle Age

The Deaths and Remnants of Stars

Cosmology

Astrobiology

Filters

Exam 13: The Galaxies

Dark,unknown forms of matter appear to make up about what fraction of the mass of a typical rich cluster of galaxies?

The temperature of the hot intergalactic gas that results from the merger of galaxies can range from 300,000 to 5 million K.What is the BEST electromagnetic radiation range in which to view this hot gas?

The expansion of the universe takes place:

The major features of our Milky Way Galaxy have been found to include all of the following EXCEPT ONE.Which is the exception?

How many barred spiral galaxies are there compared with ordinary spiral galaxies?

Discovering the Night Sky

Gravitation and the Waltz of the Planets

Light and Telescopes

Formation of the Solar System and Other Planetary Systems

Exoplanets

The Terrestrial Planets and Their Moons

The Outer Planets and Their Moons

Vagabonds of the Solar System

The Sun: Our Extraordinary Ordinary Star

Characterizing Stars

The Lives of the Stars From Birth Through Middle Age

The Deaths and Remnants of Stars

Cosmology

Astrobiology

Filters