Modern Cosmology And The Origin Of Structure

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Questions Bank

Our Place in the Universe
Patterns in the Skymotions of Earth
Laws of Motion
Light and Telescopes
The Formation of Stars and Planets
Terrestrial Worlds in the Inner Solar System
Atmospheres of Venus, Earth, and Mars
The Giant Planets
Small Bodies of the Solar System
Measuring the Stars
Our Star: The Sun
Evolution of Low-Mass Stars
Evolution of High-Mass Stars
The Expansion of Space
The Realm of the Galaxies
Our Galaxy: The Milky Way
Modern Cosmology and the Origin of Structure
Life in the Universe

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Question 1

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If the sum of the mass and energy density in the universe yields  < 1 then the universe will recollapse in a Big Crunch.

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Question 2

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The ratio of the average density in all forms of matter (luminous and dark)in our universe to the critical density is approximately 0.3.

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Question 3

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The ratio of the density in luminous matter to the critical density is 0.3.

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Question 4

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Observations of Type Ia supernovae in distant galaxies confirm that the expansion of the universe is decreasing over time.

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Question 5

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Dark energy is a force that continually decreases the expansion rate of the universe.

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Question 6

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If dark energy were to instantly cease,our universe would continue to expand forever.

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Question 7

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The concept of inflation helps solve both the problems of the flatness of the universe and smoothness of the cosmic background radiation.

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Question 8

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The theory of inflation assumes that at some point in time dark energy will decay and the universe will expand rapidly by a factor of 10³⁰.

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Question 9

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During inflation when the universe was approximately 1 second old,its size grew by a factor of 10³⁰.

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Question 10

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The three fundamental forces of nature are gravity,electromagnetism,and the strong force.

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Question 11

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The four fundamental forces of nature are gravity,electromagnetism,the weak force,and the strong force.

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Question 12

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Directly after the Big Bang,the universe was filled with a variety of charged particles,antiparticles,and photons.

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Question 13

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The force that binds three quarks together to make up a proton or neutron is called the weak force.

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Question 14

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The weak force mediates the beta decay of neutrons into protons,electrons,and antineutrinos.

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Question 15

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In the superstring theory that successfully unites gravity and quantum mechanics,the universe must have 11 dimensions (10 spatial and 1 temporal).

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Question 16

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There are fluctuations in the CBR due to the fact that clumps of dark matter had already begun to form in the universe.

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Question 17

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Even at its earliest moments,the universe had about as much structure in it as it has at the current time.

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Question 18

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As structure formed in the universe,galaxy-sized objects formed before cluster-sized objects.

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Question 19

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Current numerical models suggest that most of the universe is composed of hot dark matter.

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Question 20

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We currently find ourselves in the stelliferous era in the history of our universe.

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Modern Cosmology And The Origin Of Structure

If the sum of the mass and energy density in the universe yields  < 1 then the universe will recollapse in a Big Crunch.

The ratio of the average density in all forms of matter (luminous and dark)in our universe to the critical density is approximately 0.3.

The ratio of the density in luminous matter to the critical density is 0.3.

Observations of Type Ia supernovae in distant galaxies confirm that the expansion of the universe is decreasing over time.

Dark energy is a force that continually decreases the expansion rate of the universe.

If dark energy were to instantly cease,our universe would continue to expand forever.

The concept of inflation helps solve both the problems of the flatness of the universe and smoothness of the cosmic background radiation.

The theory of inflation assumes that at some point in time dark energy will decay and the universe will expand rapidly by a factor of 1030.

During inflation when the universe was approximately 1 second old,its size grew by a factor of 1030.

The three fundamental forces of nature are gravity,electromagnetism,and the strong force.

The four fundamental forces of nature are gravity,electromagnetism,the weak force,and the strong force.

Directly after the Big Bang,the universe was filled with a variety of charged particles,antiparticles,and photons.

The force that binds three quarks together to make up a proton or neutron is called the weak force.

The weak force mediates the beta decay of neutrons into protons,electrons,and antineutrinos.

In the superstring theory that successfully unites gravity and quantum mechanics,the universe must have 11 dimensions (10 spatial and 1 temporal).

There are fluctuations in the CBR due to the fact that clumps of dark matter had already begun to form in the universe.

Even at its earliest moments,the universe had about as much structure in it as it has at the current time.

As structure formed in the universe,galaxy-sized objects formed before cluster-sized objects.

Current numerical models suggest that most of the universe is composed of hot dark matter.

We currently find ourselves in the stelliferous era in the history of our universe.

The theory of inflation assumes that at some point in time dark energy will decay and the universe will expand rapidly by a factor of 10³⁰.

During inflation when the universe was approximately 1 second old,its size grew by a factor of 10³⁰.