Question 1

Heat death refers to the universe

Accepted Answer

A) reaching the lowest energy state possible,which will mean the greatest level of entropy. 
B) ending after a massive fire. 
C) reaching a state where all stars expand and merge into each other. 
D) reaching the point where the process of radioactive decay is no longer possible. 
A) reaching the lowest energy state possible,which will mean the greatest level of entropy. 
B) ending after a massive fire. 
C) reaching a state where all stars expand and merge into each other. 
D) reaching the point where the process of radioactive decay is no longer possible.

Question 2

Dark energy bends the curvature of spacetime

Accepted Answer

A) in the exact same fashion as gravity. 
B) in the opposite manner of gravity. 
C) by absorbing all lightwaves that pass through it. 
D) dark energy does not bend the curvature of spacetime. 
A) in the exact same fashion as gravity. 
B) in the opposite manner of gravity. 
C) by absorbing all lightwaves that pass through it. 
D) dark energy does not bend the curvature of spacetime.

Question 3

Compared to a clock at the bottom of a very tall skyscraper,a clock at the top of this skyscraper will appear to run

Accepted Answer

A) slower. 
B) faster. 
C) the same. 
A) slower. 
B) faster. 
C) the same.

Question 4

The modern theory of dark energy arises from observations showing that

Accepted Answer

A) galaxies spin at slower than expected rates. 
B) superclusters are collapsing. 
C) the speed of light is not exactly constant. 
D) galaxies are accelerating away from each other. 
A) galaxies spin at slower than expected rates. 
B) superclusters are collapsing. 
C) the speed of light is not exactly constant. 
D) galaxies are accelerating away from each other.

Question 5

Space and time are

Accepted Answer

A) bound together. 
B) independent entities. 
A) bound together. 
B) independent entities.

Question 6

According to calculations made by modern astronomers,the age of the universe is close to

Accepted Answer

A) 14 billion years. 
B) 7 billion years. 
C) 21 billion years. 
D) 6000 years. 
A) 14 billion years. 
B) 7 billion years. 
C) 21 billion years. 
D) 6000 years.

Question 7

If the Sun suddenly became less massive,what would happen to Earth's orbit?

Accepted Answer

A) Spacetime around the Sun would become flatter,and the Earth,with its current momentum,would exit its orbit around the Sun. 
B) Spacetime around the Sun would become less flat,and the Earth would go plunging into the Sun. 
C) The Earth's orbital distance from the Sun would increase correspondingly. 
D) The Earth's orbital distance from the Sun would decrease correspondingly. 
A) Spacetime around the Sun would become flatter,and the Earth,with its current momentum,would exit its orbit around the Sun. 
B) Spacetime around the Sun would become less flat,and the Earth would go plunging into the Sun. 
C) The Earth's orbital distance from the Sun would increase correspondingly. 
D) The Earth's orbital distance from the Sun would decrease correspondingly.

Question 8

The formation of more protons than neutrons (at about a 7:1.ratio)was favored in the early universe because

Accepted Answer

A) it takes more energy to create a neutron from a proton than a proton from a neutron. 
B) it takes more energy to create a proton from a neutron than a neutron from a proton. 
C) the more massive neutrons made better targets for nucleon collisions. 
D) the positively charged protons were repelled away from the explosion. 
A) it takes more energy to create a neutron from a proton than a proton from a neutron. 
B) it takes more energy to create a proton from a neutron than a neutron from a proton. 
C) the more massive neutrons made better targets for nucleon collisions. 
D) the positively charged protons were repelled away from the explosion.

Question 9

General relativity is most concerned with

Accepted Answer

A) acceleration. 
B) gravitation. 
C) space-time geometry. 
D) all of these 
E) none of these 
A) acceleration. 
B) gravitation. 
C) space-time geometry. 
D) all of these 
E) none of these

Question 10

Dark Matter is matter that

Accepted Answer

A) cannot be seen,felt,or measured. 
B) cannot be seen or felt,but can be measured through its gravitational effects. 
C) is Dark Energy's complement. 
D) is found within a black hole. 
A) cannot be seen,felt,or measured. 
B) cannot be seen or felt,but can be measured through its gravitational effects. 
C) is Dark Energy's complement. 
D) is found within a black hole.

Question 11

Relativity is the

Accepted Answer

A) study of how space,energy,and mass are related to time. 
B) concept that there are no absolutes that can be postulated. 
C) idea that space bends in relationship to the square of the mass contained within it. 
D) study of wormholes and time travel. 
A) study of how space,energy,and mass are related to time. 
B) concept that there are no absolutes that can be postulated. 
C) idea that space bends in relationship to the square of the mass contained within it. 
D) study of wormholes and time travel.

Question 12

A person on the ground floor of a skyscraper ages

Accepted Answer

A) faster than a person on the top floor. 
B) slower than a person on the top floor. 
C) at the same speed as a person on the top floor. 
A) faster than a person on the top floor. 
B) slower than a person on the top floor. 
C) at the same speed as a person on the top floor.

Question 13

If you were to travel at a speed close to the speed of light,you would notice that your own

Accepted Answer

A) mass changes. 
B) pulse decreases. 
C) Both of these. 
D) Neither of these. 
A) mass changes. 
B) pulse decreases. 
C) Both of these. 
D) Neither of these.

Exam 28: The Structure of Space and Time

Heat death refers to the universe

Dark energy bends the curvature of spacetime

Compared to a clock at the bottom of a very tall skyscraper,a clock at the top of this skyscraper will appear to run

The modern theory of dark energy arises from observations showing that

Space and time are

According to calculations made by modern astronomers,the age of the universe is close to

If the Sun suddenly became less massive,what would happen to Earth's orbit?

The formation of more protons than neutrons (at about a 7:1.ratio)was favored in the early universe because

General relativity is most concerned with

Dark Matter is matter that

Relativity is the

A person on the ground floor of a skyscraper ages

If you were to travel at a speed close to the speed of light,you would notice that your own

Patterns of Motion and Equilibrium

Newtons Laws of Motion

Momentum and Energy

Gravity, Projectiles, and Satellites

Fluid Mechanics

Thermal Energy and Thermodynamics

Heat Transfer and Change of Phase

Static and Current Electricity

Magnetism and Electromagnetic Induction

Waves and Sound

Light

Atoms and the Periodic Table

The Atomic Nucleus and Radioactivity

Elements of Chemistry

How Atoms Bond and Molecules Attract

Mixtures

How Chemicals React

Two Classes of Chemical Reactions

Organic Compounds

Rocks and Minerals

Plate Tectonics and Earths Interior

Shaping Earths Surface

Geologic Time - Reading the Rock Record

The Oceans, Atmosphere, and Climatic Effects

Driving Forces of Weather

The Solar System

Stars and Galaxies

Prologue: The Nature of Science

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