Question 1

What is the fate of the universe if the density of dark energy increases over time?

Accepted Answer

If this happens, the future will be very

Question 2

How is it that every point in the universe appears to be the center of the universe?

Accepted Answer

It is relative because no matt

Question 3

Why do scientists think that dark matter does not interact through the electromagnetic force?

Accepted Answer

A)  because, if it did, it would absorb or emit photons 
B)  because it exists too far out into space 
C)  it exerts no gravitational pull on other matter 
D)  there is too little of it to exert an electromagnetic force 
E)  all of these are correct 
A)  because, if it did, it would absorb or emit photons 
B)  because it exists too far out into space 
C)  it exerts no gravitational pull on other matter 
D)  there is too little of it to exert an electromagnetic force 
E)  all of these are correct

Question 4

In the night sky, the Milky Way appears as a band of stars across the night sky. How does this fit with the model of a spiral galaxy?

Accepted Answer

A spiral galaxy is flattened i

Question 5

When the strong and electroweak forces were unified, what two events occurred in the history of the universe?

Accepted Answer

There was an extremely rapid expansion o

Question 6

In what way was the existence of other galaxies in the universe demonstrated when Hubble measured the distance to the Andromeda nebula?

Accepted Answer

The Andromeda nebula was so fa

Question 7

What new evidence has led to wider acceptance of the open universe theory?

Accepted Answer

Astronomers recently reported that using

Question 8

Dark matter particles move as a sort of 'wind.' Why do we not feel this 'wind'?

Accepted Answer

The particles in the dark matt

Question 9

Which wavelength of radiation is associated with our expanding universe?

Accepted Answer

A)  7.35 nanometers 
B)  7.35 millimeters 
C)  7.35 centimeters 
D)  7.35 meters 
E)  7.35 kilometers 
A)  7.35 nanometers 
B)  7.35 millimeters 
C)  7.35 centimeters 
D)  7.35 meters 
E)  7.35 kilometers

Question 10

At what point after the Big Bang did the elementary particles form?

Accepted Answer

A)  10-43 seconds 
B)  10-35 seconds 
C)  10-5 seconds 
D)  three minutes 
E)  500,000 years 
A)  10-43 seconds 
B)  10-35 seconds 
C)  10-5 seconds 
D)  three minutes 
E)  500,000 years

Question 11

What are the main effects of dark matter and dark energy in the universe?

Accepted Answer

Dark matter seems to produce a

Question 12

Place the celestial objects in order by size from planet being the smallest to supercluster being the largest. How do astronomers know our position in the universe?

Accepted Answer

- In order of size, these objects are a

Question 13

When astronomers look out at our universe, they see all

Accepted Answer

A)  other planets moving away from us. 
B)  other galaxies moving away from us. 
C)  asteroids moving toward us. 
D)  supernovas moving away from us. 
E)  other galaxies moving toward us. 
A)  other planets moving away from us. 
B)  other galaxies moving away from us. 
C)  asteroids moving toward us. 
D)  supernovas moving away from us. 
E)  other galaxies moving toward us.

Question 14

How might scientists tell if the universe started to contract?

Accepted Answer

One way would be that scientists would o

Question 15

At present, what is thought to be the composition of the universe besides ordinary matter?

Accepted Answer

The universe is thought to con

Question 16

Compare the future for the three theories of the universe: flat, open, and closed.

Accepted Answer

An open universe will expand forever bec

Question 17

What is the basis for evidence supporting the theory of an open expanding universe?

Accepted Answer

A)  the laws of gravity 
B)  the mass of the universe 
C)  the proportion of dark matter 
D)  a newly discovered supernova 
E)  all of these are correct 
A)  the laws of gravity 
B)  the mass of the universe 
C)  the proportion of dark matter 
D)  a newly discovered supernova 
E)  all of these are correct

Question 18

What experimental evidence supports the Big Bang theory?

Accepted Answer

A)  universal contraction 
B)  creationism 
C)  cosmic microwave radiation 
D)  abundance of hydrogen, helium, and lithium 
E)  cosmic microwave radiation and the abundance of lithium, hydrogen, and helium 
A)  universal contraction 
B)  creationism 
C)  cosmic microwave radiation 
D)  abundance of hydrogen, helium, and lithium 
E)  cosmic microwave radiation and the abundance of lithium, hydrogen, and helium

Question 19

What were the first three elements formed in the Big Bang?

Accepted Answer

A)  hydrogen, lithium, and helium 
B)  hydrogen, oxygen, and helium 
C)  helium, oxygen, and carbon 
D)  carbon, oxygen, and deuterium 
E)  helium, oxygen, lithium 
A)  hydrogen, lithium, and helium 
B)  hydrogen, oxygen, and helium 
C)  helium, oxygen, and carbon 
D)  carbon, oxygen, and deuterium 
E)  helium, oxygen, lithium

Question 20

What is the likely composition of dark matter?

Accepted Answer

A number of different particles could co

Exam 15: Cosmology: Will the Universe End

What is the fate of the universe if the density of dark energy increases over time?

How is it that every point in the universe appears to be the center of the universe?

Why do scientists think that dark matter does not interact through the electromagnetic force?

In the night sky, the Milky Way appears as a band of stars across the night sky. How does this fit with the model of a spiral galaxy?

When the strong and electroweak forces were unified, what two events occurred in the history of the universe?

In what way was the existence of other galaxies in the universe demonstrated when Hubble measured the distance to the Andromeda nebula?

What new evidence has led to wider acceptance of the open universe theory?

Dark matter particles move as a sort of 'wind.' Why do we not feel this 'wind'?

Which wavelength of radiation is associated with our expanding universe?

At what point after the Big Bang did the elementary particles form?

What are the main effects of dark matter and dark energy in the universe?

Place the celestial objects in order by size from planet being the smallest to supercluster being the largest. How do astronomers know our position in the universe?

When astronomers look out at our universe, they see all

How might scientists tell if the universe started to contract?

At present, what is thought to be the composition of the universe besides ordinary matter?

Compare the future for the three theories of the universe: flat, open, and closed.

What is the basis for evidence supporting the theory of an open expanding universe?

What experimental evidence supports the Big Bang theory?

What were the first three elements formed in the Big Bang?

What is the likely composition of dark matter?

Science: a Way of Knowing: How Do You Know What You Know

The Ordered Universe: Why Do Planets Appear to Wander Slowly Across the Sky

Energy: Why Must Animals Eat to Stay Alive

Heat and the Second Law of Thermodynamics: Why Is It Easier to Make an Omelet From an Egg Than to Make an Egg From an Omelet

Electricity and Magnetism: What Is Lightning

Waves and Electromagnetic Radiation: What Is Color

Albert Einstein and the Theory of Relativity: Can a Human Ever Travel Faster Than the Speed of Light, at Warp Speed

The Atom: Why Are There so Many Different Materials in the World

Quantum Mechanics: How Can the Electron Behave Like Both a Particle and a Wave

Atoms in Combination: the Chemical Bond: How Does Blood Clot

Materials and Their Properties: How Have Computers Gotten so Much Faster

The Nucleus of the Atom: How Do Scientists Determine the Age of the Oldest Human Fossils

The Ultimate Structure of Matter: How Can Antimatter Be Used to Probe the Human Brain

The Stars: How Much Longer Can the Sun Sustain Life on Earth

Earth and Other Planets: Is Earth the Only Planet With Life

Plate Tectonics: Can We Predict Destructive Earthquakes

Earths Many Cycles: Will We Ever Run Out of Fresh Water

Ecology, Ecosystems, and the Environment: Are Human Activities Affecting the Global Environment

Strategies of Life: What Is Life

The Living Cell: What Is the Smallest Living Thing

Molecules of Life: What Constitutes a Healthy Diet

Classical and Modern Genetics: Why Do Offspring Resemble Their Parents

The New Science of Life: Can We Cure Cancer

Evolution: How Did Life Emerge on the Ancient Earth

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