Question 1

The number of planets outside the solar system thus far detected is

Accepted Answer

A)  about 20. 
B)  about 100. 
C)  several thousand. 
D)  several million. 
A)  about 20. 
B)  about 100. 
C)  several thousand. 
D)  several million.

Question 2

The cosmic background radiation today

Accepted Answer

A)  is present only in galaxies. 
B)  is present everywhere in the universe. 
C)  accounts for less of the radiation in the universe than starlight. 
D)  is visible as a faint glow in the sky on dark nights. 
A)  is present only in galaxies. 
B)  is present everywhere in the universe. 
C)  accounts for less of the radiation in the universe than starlight. 
D)  is visible as a faint glow in the sky on dark nights.

Question 3

Present evidence suggests that the universe

Accepted Answer

A)  will expand forever. 
B)  will eventually stop expanding and then remain a fixed size. 
C)  will eventually stop expanding and then contract. 
D)  has just begun to contract. 
A)  will expand forever. 
B)  will eventually stop expanding and then remain a fixed size. 
C)  will eventually stop expanding and then contract. 
D)  has just begun to contract.

Question 4

Considering matter and energy together, the smallest component of the universe seems to be

Accepted Answer

A)  electromagnetic radiation of various kinds. 
B)  ordinary matter. 
C)  dark matter. 
D)  dark energy. 
A)  electromagnetic radiation of various kinds. 
B)  ordinary matter. 
C)  dark matter. 
D)  dark energy.

Question 5

Dark energy

Accepted Answer

A)  is the energy equivalent of dark matter. 
B)  is the energy of black holes. 
C)  is the energy of neutrinos. 
D)  has an unknown nature as yet. 
A)  is the energy equivalent of dark matter. 
B)  is the energy of black holes. 
C)  is the energy of neutrinos. 
D)  has an unknown nature as yet.

Question 6

The sun is

Accepted Answer

A)  a Population I star. 
B)  a Population II star. 
C)  different from Population I and II stars. 
D)  a member of a globular cluster. 
A)  a Population I star. 
B)  a Population II star. 
C)  different from Population I and II stars. 
D)  a member of a globular cluster.

Question 7

The Milky Way is a

Accepted Answer

A)  globular duster. 
B)  nearby galaxy. 
C)  galaxy with the sun at its center. 
D)  galaxy with the sun some distance from its center. 
A)  globular duster. 
B)  nearby galaxy. 
C)  galaxy with the sun at its center. 
D)  galaxy with the sun some distance from its center.

Question 8

Magnetic fields in our galaxy trap

Accepted Answer

A)  cosmic rays. 
B)  radio waves. 
C)  spectral lines. 
D)  meteoroids. 
A)  cosmic rays. 
B)  radio waves. 
C)  spectral lines. 
D)  meteoroids.

Question 9

Planetary systems are probably

Accepted Answer

A)  very rare in the universe. 
B)  present around many stars. 
C)  present around all stars. 
D)  present only around stars that rotate rapidly. 
A)  very rare in the universe. 
B)  present around many stars. 
C)  present around all stars. 
D)  present only around stars that rotate rapidly.

Question 10

In the light of current evidence, a reasonable figure for the age of the universe is

Accepted Answer

A)  13.7 million years. 
B)  13.7 billion years. 
C)  100 billion years. 
D)  15 trillion years. 
A)  13.7 million years. 
B)  13.7 billion years. 
C)  100 billion years. 
D)  15 trillion years.

The number of planets outside the solar system thus far detected is

The cosmic background radiation today

Present evidence suggests that the universe

Considering matter and energy together, the smallest component of the universe seems to be

Dark energy

The sun is

The Milky Way is a

Magnetic fields in our galaxy trap

Planetary systems are probably

In the light of current evidence, a reasonable figure for the age of the universe is

The Scientific Method

Motion

Energy

Energy and the Future

Matter and Heat

Electricity and Magnetism

Waves

The Nucleus

The Atom

The Periodic Law

Crystals, Ions, and Solutions

Chemical Reactions

Organic Chemistry

Atmosphere and Hydrosphere

The Rock Cycle

The Evolving Earth

The Solar System

The Stars

Filters

Exam 19: The Universe Galaxies

The number of planets outside the solar system thus far detected is

The cosmic background radiation today

Present evidence suggests that the universe

Considering matter and energy together, the smallest component of the universe seems to be

Dark energy

The sun is

The Milky Way is a

Magnetic fields in our galaxy trap

Planetary systems are probably

In the light of current evidence, a reasonable figure for the age of the universe is

The Scientific Method

Motion

Energy

Energy and the Future

Matter and Heat

Electricity and Magnetism

Waves

The Nucleus

The Atom

The Periodic Law

Crystals, Ions, and Solutions

Chemical Reactions

Organic Chemistry

Atmosphere and Hydrosphere

The Rock Cycle

The Evolving Earth

The Solar System

The Stars

Filters