Question 1

The expansion of the Universe is accelerating.

Accepted Answer

A) True 
 B)False

Question 2

Olber's paradox is explained by the fact that the Universe is neither static nor infinite in age.

Accepted Answer

A) True 
 B)False

Question 3

The proper interpretation of a what a galaxy's redshift measures is ____.

Accepted Answer

A)  its motion in space toward the observer 
B)  its motion in space away from the big bang 
C)  the stretching of space between the galaxy and the observer 
D)  the contraction of space between the galaxy and the observer 
E)  the stretching of space between the galaxy and the big bang 
A)  its motion in space toward the observer 
B)  its motion in space away from the big bang 
C)  the stretching of space between the galaxy and the observer 
D)  the contraction of space between the galaxy and the observer 
E)  the stretching of space between the galaxy and the big bang

Question 4

When matter and antimatter particles combine, the two particles annihilate each other and convert their mass into energy in the form of two gamma rays.

Accepted Answer

A) True 
 B)False

Question 5

The microwave emission detected by Arno Penzias and Robert Wilson fits a blackbody spectrum with a temperature of about ____.

Accepted Answer

A)  0 K 
B)  273 K 
C)  27 K 
D)  7.2 K 
E)  2.7 K 
A)  0 K 
B)  273 K 
C)  27 K 
D)  7.2 K 
E)  2.7 K

Question 6

The cosmic microwave background radiation was emitted during a time when ____ was the important process in the Universe.

Accepted Answer

A)  recombination 
B)  ionization 
C)  fusion 
D)  antiproton production 
E)  positron production 
A)  recombination 
B)  ionization 
C)  fusion 
D)  antiproton production 
E)  positron production

Question 7

The observed distribution of matter in the Universe is best understood as being caused by ____.

Accepted Answer

A)  clumping of dark matter in the early Universe causing clumping of normal matter 
B)  clumping of normal matter in the early Universe causing clumping of dark matter 
C)  simultaneous clumping of normal and dark matter 
D)  large variations in the intensity of the cosmic microwave background 
E)  homogenous expansion of normal and dark matter 
A)  clumping of dark matter in the early Universe causing clumping of normal matter 
B)  clumping of normal matter in the early Universe causing clumping of dark matter 
C)  simultaneous clumping of normal and dark matter 
D)  large variations in the intensity of the cosmic microwave background 
E)  homogenous expansion of normal and dark matter

Question 8

Dark matter must be ____.

Accepted Answer

A)  baryonic 
B)  non-baryonic 
C)  neutral 
D)  WIMPs 
E)  isochronic 
A)  baryonic 
B)  non-baryonic 
C)  neutral 
D)  WIMPs 
E)  isochronic

Question 9

Modern observations have shown that the geometry of the Universe is ____.

Accepted Answer

A)  flat, and the Universe must be infinite 
B)  flat, and the Universe must not be infinite 
C)  open, and the Universe must be infinite 
D)  closed, and the Universe must be infinite 
E)  closed, and the Universe must not be infinite 
A)  flat, and the Universe must be infinite 
B)  flat, and the Universe must not be infinite 
C)  open, and the Universe must be infinite 
D)  closed, and the Universe must be infinite 
E)  closed, and the Universe must not be infinite

Question 10

Why do astronomers conclude that the Universe is filled with dark energy? Discuss two of the primary reasons.

Accepted Answer

A series of observations of different pr

Question 11

Cosmologists cannot begin their history of the big bang at a time of exactly zero because it cannot be explained by current physics.

Accepted Answer

A) True 
 B)False

The expansion of the Universe is accelerating.

Olber's paradox is explained by the fact that the Universe is neither static nor infinite in age.

The proper interpretation of a what a galaxy's redshift measures is ____.

When matter and antimatter particles combine, the two particles annihilate each other and convert their mass into energy in the form of two gamma rays.

The microwave emission detected by Arno Penzias and Robert Wilson fits a blackbody spectrum with a temperature of about ____.

The cosmic microwave background radiation was emitted during a time when ____ was the important process in the Universe.

The observed distribution of matter in the Universe is best understood as being caused by ____.

Dark matter must be ____.

Modern observations have shown that the geometry of the Universe is ____.

Why do astronomers conclude that the Universe is filled with dark energy? Discuss two of the primary reasons.

Cosmologists cannot begin their history of the big bang at a time of exactly zero because it cannot be explained by current physics.

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 Family of Stars

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

Astrobiology

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 18: Modern Cosmology

The expansion of the Universe is accelerating.

Olber's paradox is explained by the fact that the Universe is neither static nor infinite in age.

The proper interpretation of a what a galaxy's redshift measures is ____.

When matter and antimatter particles combine, the two particles annihilate each other and convert their mass into energy in the form of two gamma rays.

The microwave emission detected by Arno Penzias and Robert Wilson fits a blackbody spectrum with a temperature of about ____.

The cosmic microwave background radiation was emitted during a time when ____ was the important process in the Universe.

The observed distribution of matter in the Universe is best understood as being caused by ____.

Dark matter must be ____.

Modern observations have shown that the geometry of the Universe is ____.

Why do astronomers conclude that the Universe is filled with dark energy? Discuss two of the primary reasons.

Cosmologists cannot begin their history of the big bang at a time of exactly zero because it cannot be explained by current physics.

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 Family of Stars

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

Astrobiology

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