Question 1

The Doppler shifting of radiation from the early universe has resulted in today's universe being bathed in a sea of

Accepted Answer

A) cosmic rays. 
B) X-rays. 
C) radio waves. 
D) infrared waves. 
A) cosmic rays. 
B) X-rays. 
C) radio waves. 
D) infrared waves. C

Question 2

The ratio of dark matter to ordinary matter in our galaxy is about

Accepted Answer

A) 1:1. 
B) 2:1. 
C) 6:1. 
D) 25:1. 
A) 1:1. 
B) 2:1. 
C) 6:1. 
D) 25:1. C

Question 3

Some, and perhaps all, spiral galaxies have at their centers

Accepted Answer

A) quasars. 
B) pulsars. 
C) black holes. 
D) globular star clusters. 
A) quasars. 
B) pulsars. 
C) black holes. 
D) globular star clusters. C

Question 4

Information about the origin of the universe does not come from the

Accepted Answer

A) fact that spiral galaxies rotate. 
B) red shifts in galactic spectra. 
C) relative abundances of hydrogen and helium. 
D) cosmic background radiation. 
A) fact that spiral galaxies rotate. 
B) red shifts in galactic spectra. 
C) relative abundances of hydrogen and helium. 
D) cosmic background radiation.

Question 5

Immediately after the big bang, the universe contained

Accepted Answer

A) only matter. 
B) equal amounts of matter and antimatter. 
C) slightly more matter than antimatter. 
D) slightly more antimatter than matter. 
A) only matter. 
B) equal amounts of matter and antimatter. 
C) slightly more matter than antimatter. 
D) slightly more antimatter than matter.

Question 6

The expansion of the universe apparently

Accepted Answer

A) has always occurred at the same rate. 
B) is currently slowing down. 
C) is currently speeding up. 
D) has come to a stop. 
A) has always occurred at the same rate. 
B) is currently slowing down. 
C) is currently speeding up. 
D) has come to a stop.

Question 7

Emissions of various kinds from near the center of the Milky Way galaxy suggests the presence of a

Accepted Answer

A) quasar. 
B) globular cluster. 
C) black hole. 
D) galactic nebula. 
A) quasar. 
B) globular cluster. 
C) black hole. 
D) galactic nebula.

Question 8

Primary cosmic rays consist of

Accepted Answer

A) atomic nuclei, mainly protons. 
B) neutral atoms, mainly of hydrogen. 
C) molecules. 
D) electrons. 
A) atomic nuclei, mainly protons. 
B) neutral atoms, mainly of hydrogen. 
C) molecules. 
D) electrons.

Question 9

Nearly all the helium in the universe was formed in

Accepted Answer

A) the first few minutes after the big bang. 
B) the interior of stars. 
C) supernova explosions. 
D) black holes. 
A) the first few minutes after the big bang. 
B) the interior of stars. 
C) supernova explosions. 
D) black holes.

Question 10

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 11

Communications with planets outside the solar system are most likely to be achieved using

Accepted Answer

A) spacecraft of the kind that went to the moon. 
B) spacecraft that travel with the speed of light. 
C) spacecraft that travel faster than light. 
D) radio waves. 
A) spacecraft of the kind that went to the moon. 
B) spacecraft that travel with the speed of light. 
C) spacecraft that travel faster than light. 
D) radio waves.

Question 12

Considering matter and energy together, the largest 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 13

The stars in the disk of our galaxy are mostly distributed

Accepted Answer

A) uniformly. 
B) at random. 
C) in 1 spiral arm. 
D) in 2 spiral arms. 
A) uniformly. 
B) at random. 
C) in 1 spiral arm. 
D) in 2 spiral arms.

Question 14

The number of stars in our galaxy is approximately

Accepted Answer

A) 10,000. 
B) 10 million. 
C) 1 billion. 
D) 100 billion. 
A) 10,000. 
B) 10 million. 
C) 1 billion. 
D) 100 billion.

Question 15

The stars in our galaxy

Accepted Answer

A) move entirely at random. 
B) move toward its center. 
C) move away from its center. 
D) revolve around its center. 
A) move entirely at random. 
B) move toward its center. 
C) move away from its center. 
D) revolve around its center.

Question 16

Interstellar space in our galaxy

Accepted Answer

A) is completely empty. 
B) is completely empty except for clouds of gas and dust. 
C) contains about 1 atom or molecule per cm3. 
D) contains about 1 atom or molecule per cm3 between denser clouds of gas and dust. 
A) is completely empty. 
B) is completely empty except for clouds of gas and dust. 
C) contains about 1 atom or molecule per cm3. 
D) contains about 1 atom or molecule per cm3 between denser clouds of gas and dust.

Question 17

The number of galaxies in the universe seems to be about

Accepted Answer

A) 200. 
B) 200,000. 
C) 200 million. 
D) 200 billion. 
A) 200. 
B) 200,000. 
C) 200 million. 
D) 200 billion.

Question 18

In a "closed" universe

Accepted Answer

A) expansion of the universe will continue forever. 
B) no additional new stars will form. 
C) the universe will neither expand nor collapse. 
D) expansion will stop and the universe will ultimately collapse. 
A) expansion of the universe will continue forever. 
B) no additional new stars will form. 
C) the universe will neither expand nor collapse. 
D) expansion will stop and the universe will ultimately collapse.

Question 19

The stars in globular clusters

Accepted Answer

A) are relatively close together. 
B) have an average spacing like that of stars in the galactic disk. 
C) are relatively far apart. 
D) form spiral arms. 
A) are relatively close together. 
B) have an average spacing like that of stars in the galactic disk. 
C) are relatively far apart. 
D) form spiral arms.

Question 20

The "dark matter" that all galaxies apparently contain

Accepted Answer

A) consists of antimatter. 
B) consists of cosmic rays. 
C) consists of dead stars. 
D) is of unknown nature. 
A) consists of antimatter. 
B) consists of cosmic rays. 
C) consists of dead stars. 
D) is of unknown nature.

The Doppler shifting of radiation from the early universe has resulted in today's universe being bathed in a sea of

The ratio of dark matter to ordinary matter in our galaxy is about

Some, and perhaps all, spiral galaxies have at their centers

Information about the origin of the universe does not come from the

Immediately after the big bang, the universe contained

The expansion of the universe apparently

Emissions of various kinds from near the center of the Milky Way galaxy suggests the presence of a

Primary cosmic rays consist of

Nearly all the helium in the universe was formed in

The cosmic background radiation today

Communications with planets outside the solar system are most likely to be achieved using

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

The stars in the disk of our galaxy are mostly distributed

The number of stars in our galaxy is approximately

The stars in our galaxy

Interstellar space in our galaxy

The number of galaxies in the universe seems to be about

In a "closed" universe

The stars in globular clusters

The "dark matter" that all galaxies apparently contain

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: Universe

The Doppler shifting of radiation from the early universe has resulted in today's universe being bathed in a sea of

The ratio of dark matter to ordinary matter in our galaxy is about

Some, and perhaps all, spiral galaxies have at their centers

Information about the origin of the universe does not come from the

Immediately after the big bang, the universe contained

The expansion of the universe apparently

Emissions of various kinds from near the center of the Milky Way galaxy suggests the presence of a

Primary cosmic rays consist of

Nearly all the helium in the universe was formed in

The cosmic background radiation today

Communications with planets outside the solar system are most likely to be achieved using

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

The stars in the disk of our galaxy are mostly distributed

The number of stars in our galaxy is approximately

The stars in our galaxy

Interstellar space in our galaxy

The number of galaxies in the universe seems to be about

In a "closed" universe

The stars in globular clusters

The "dark matter" that all galaxies apparently contain

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