Question 1

The best answer to both the flatness and horizon problems is

Accepted Answer

A)  the Steady State Theory. 
B)  the GUT theory. 
C)  the inflationary epoch. 
D)  dark energy. 
E)  decoupling. 
A)  the Steady State Theory. 
B)  the GUT theory. 
C)  the inflationary epoch. 
D)  dark energy. 
E)  decoupling.

Question 2

The Hubble time is expressed as

Accepted Answer

A)  H × D. 
B)  D/v. 
C)  1/H. 
D)  H × T. 
E)  the critical density/H. 
A)  H × D. 
B)  D/v. 
C)  1/H. 
D)  H × T. 
E)  the critical density/H.

Question 3

Why were elements heavier than helium not produced during the Big Bang?

Accepted Answer

Once helium was formed from de

Question 4

Currently, most of the mass of the matter of the universe is believed to consist of

Accepted Answer

A)  baryonic matter, made up of protons and neutrons. 
B)  tachyonic matter, travelling only faster than the speed of light. 
C)  dark matter not made of protons and neutrons. 
D)  dark energy. 
E)  tiny but very numerous black holes. 
A)  baryonic matter, made up of protons and neutrons. 
B)  tachyonic matter, travelling only faster than the speed of light. 
C)  dark matter not made of protons and neutrons. 
D)  dark energy. 
E)  tiny but very numerous black holes.

Question 5

The extended sheet of galaxies that spans 70 Mpc × 200 Mpc and includes about 24,000 galaxies is called the ________.

Accepted Answer

The answer of The extended sheet of galaxies that spans...

Question 6

What factors would determine that we live in a matter-dominated universe?

Accepted Answer

The density of matter can be approximate

Question 7

Describe what occurred during the period of decoupling.

Accepted Answer

During decoupling, about 400,000 years a

Question 8

Why was the separation of the superforce into three forces so important?

Accepted Answer

The pressure release created t

Question 9

Deuterium was made only in primordial nucleosynthesis, since stars destroy it.

Accepted Answer

A) True 
 B)False

Question 10

Astronomers know the universe is expanding because

Accepted Answer

A)  everything is moving away from us. 
B)  all stars are moving away from us. 
C)  most galaxies are moving away from us. 
D)  galaxies farther away are moving away from us faster. 
E)  there is a cosmic microwave background. 
A)  everything is moving away from us. 
B)  all stars are moving away from us. 
C)  most galaxies are moving away from us. 
D)  galaxies farther away are moving away from us faster. 
E)  there is a cosmic microwave background.

Question 11

Which of these seems the best present answer to the flatness problem?

Accepted Answer

A)  The superforce rules creation. 
B)  Dark Energy speeds the universe on out to infinity. 
C)  Symmetry in creation of particles and antiparticles 
D)  The inflationary epoch 
E)  The GUT theory 
A)  The superforce rules creation. 
B)  Dark Energy speeds the universe on out to infinity. 
C)  Symmetry in creation of particles and antiparticles 
D)  The inflationary epoch 
E)  The GUT theory

Question 12

Is the cosmological red shift really a velocity of a given galaxy?

Accepted Answer

No, it is a measure of how fas

Question 13

What was there just after the Big Bang?

Accepted Answer

A)  Nothing 
B)  The primeval fireball 
C)  A singularity 
D)  A black hole 
E)  Everything was inside Earth. 
A)  Nothing 
B)  The primeval fireball 
C)  A singularity 
D)  A black hole 
E)  Everything was inside Earth.

Question 14

Describe the separation of the superforce and the effect it had on the Universe.

Accepted Answer

The superforce separated into the electr

Question 15

Most of the deuterium that formed right after the Big Bang

Accepted Answer

A)  is still around today. 
B)  broke down into electrons and neutrons. 
C)  turned into dark matter. 
D)  quickly burned into helium nuclei. 
E)  was found in the globular clusters. 
A)  is still around today. 
B)  broke down into electrons and neutrons. 
C)  turned into dark matter. 
D)  quickly burned into helium nuclei. 
E)  was found in the globular clusters.

Question 16

The cosmological principle calls for the distribution of galaxies to be homogeneous. On the large scale, is this true?

Accepted Answer

No; the superclusters of galaxies seem t

Question 17

When dark matter first became popular, many astronomers thought that was greater than one from the extra gravity, favoring what type of Universe?

Accepted Answer

This would have favored a clos

Question 18

Is there enough luminous matter to stop the universe's expansion? Is there enough dark matter? What else is there?

Accepted Answer

There seems to be only about 1-3% of the

The best answer to both the flatness and horizon problems is

The Hubble time is expressed as

Why were elements heavier than helium not produced during the Big Bang?

Currently, most of the mass of the matter of the universe is believed to consist of

The extended sheet of galaxies that spans 70 Mpc × 200 Mpc and includes about 24,000 galaxies is called the ________.

What factors would determine that we live in a matter-dominated universe?

Describe what occurred during the period of decoupling.

Why was the separation of the superforce into three forces so important?

Deuterium was made only in primordial nucleosynthesis, since stars destroy it.

Astronomers know the universe is expanding because

Which of these seems the best present answer to the flatness problem?

Is the cosmological red shift really a velocity of a given galaxy?

What was there just after the Big Bang?

Describe the separation of the superforce and the effect it had on the Universe.

Most of the deuterium that formed right after the Big Bang

The cosmological principle calls for the distribution of galaxies to be homogeneous. On the large scale, is this true?

When dark matter first became popular, many astronomers thought that was greater than one from the extra gravity, favoring what type of Universe?

Is there enough luminous matter to stop the universe's expansion? Is there enough dark matter? What else is there?

The Night Sky

Light and Telescopes

The Solar System

Earth and Its Moon

The Eight Planets

Small Bodies in the Solar System

Formation of Planetary Systems

The Sun

Measuring the Stars

Star Formation and Evolution

Stellar Explosions

Black Holes

The Milky Way Galaxy

Galaxies

Filters

Exam 15: Cosmology and the Universe

The best answer to both the flatness and horizon problems is

The Hubble time is expressed as

Why were elements heavier than helium not produced during the Big Bang?

Currently, most of the mass of the matter of the universe is believed to consist of

The extended sheet of galaxies that spans 70 Mpc × 200 Mpc and includes about 24,000 galaxies is called the ________.

What factors would determine that we live in a matter-dominated universe?

Describe what occurred during the period of decoupling.

Why was the separation of the superforce into three forces so important?

Deuterium was made only in primordial nucleosynthesis, since stars destroy it.

Astronomers know the universe is expanding because

Which of these seems the best present answer to the flatness problem?

Is the cosmological red shift really a velocity of a given galaxy?

What was there just after the Big Bang?

Describe the separation of the superforce and the effect it had on the Universe.

Most of the deuterium that formed right after the Big Bang

The cosmological principle calls for the distribution of galaxies to be homogeneous. On the large scale, is this true?

When dark matter first became popular, many astronomers thought that was greater than one from the extra gravity, favoring what type of Universe?

Is there enough luminous matter to stop the universe's expansion? Is there enough dark matter? What else is there?

The Night Sky

Light and Telescopes

The Solar System

Earth and Its Moon

The Eight Planets

Small Bodies in the Solar System

Formation of Planetary Systems

The Sun

Measuring the Stars

Star Formation and Evolution

Stellar Explosions

Black Holes

The Milky Way Galaxy

Galaxies

Filters