Question 1

The main sequence on the HR diagram includes

Accepted Answer

A) the sun. 
B) white dwarfs. 
C) red giants. 
D) pulsars. 
A) the sun. 
B) white dwarfs. 
C) red giants. 
D) pulsars.

Question 2

In the HR diagram, most stars are

Accepted Answer

A) members of the main sequence. 
B) red giants. 
C) white dwarfs. 
D) scattered at random. 
A) members of the main sequence. 
B) red giants. 
C) white dwarfs. 
D) scattered at random.

Question 3

White dwarfs are stars that are

Accepted Answer

A) at the beginning of their life cycles. 
B) in the middle of their life cycles. 
C) at the end of their life cycles. 
D) Any of these choices are correct. 
A) at the beginning of their life cycles. 
B) in the middle of their life cycles. 
C) at the end of their life cycles. 
D) Any of these choices are correct.

Question 4

The spectrum of a star can provide information of which one or more of the following?

Accepted Answer

A) the star's magnetic field 
B) the star's temperature 
C) the star's relative motion toward or away from us 
D) the star's composition 
E) All of the above 
A) the star's magnetic field 
B) the star's temperature 
C) the star's relative motion toward or away from us 
D) the star's composition 
E) All of the above

Question 5

There is a surprisingly small variation among stellar

Accepted Answer

A) temperatures. 
B) diameters. 
C) densities. 
D) masses. 
A) temperatures. 
B) diameters. 
C) densities. 
D) masses.

Question 6

Most stars have hot interiors surrounded by relatively cool atmospheres.The spectrum of such a star consists of

Accepted Answer

A) white lines against a dark background. 
B) colored lines against a dark background. 
C) dark lines against a white background. 
D) dark lines against a colored background. 
A) white lines against a dark background. 
B) colored lines against a dark background. 
C) dark lines against a white background. 
D) dark lines against a colored background.

Question 7

Stars whose intrinsic brightness and period of variation are related are called

Accepted Answer

A) pulsars. 
B) Cepheid variables. 
C) main-sequence stars. 
D) red giants. 
A) pulsars. 
B) Cepheid variables. 
C) main-sequence stars. 
D) red giants.

Question 8

At the end of its period in the main sequence, a very heavy star

Accepted Answer

A) breaks up into several smaller stars. 
B) cools down into a white dwarf. 
C) expands into a red giant. 
D) explodes into a supernova. 
A) breaks up into several smaller stars. 
B) cools down into a white dwarf. 
C) expands into a red giant. 
D) explodes into a supernova.

Question 9

What keeps light from escaping from a black hole is its

Accepted Answer

A) strong electric field. 
B) strong magnetic field. 
C) strong gravitational field. 
D) absorbing atmosphere. 
A) strong electric field. 
B) strong magnetic field. 
C) strong gravitational field. 
D) absorbing atmosphere.

Question 10

At the end of its period in the main sequence, a star whose mass is near that of the sun

Accepted Answer

A) breaks up into several smaller stars. 
B) cools down into a white dwarf. 
C) expands into a red giant. 
D) explodes into a supernova. 
A) breaks up into several smaller stars. 
B) cools down into a white dwarf. 
C) expands into a red giant. 
D) explodes into a supernova.

Question 11

The source of the sun's energy is

Accepted Answer

A) radioactivity. 
B) nuclear fission. 
C) nuclear fusion. 
D) combustion. 
A) radioactivity. 
B) nuclear fission. 
C) nuclear fusion. 
D) combustion.

The main sequence on the HR diagram includes

In the HR diagram, most stars are

White dwarfs are stars that are

The spectrum of a star can provide information of which one or more of the following?

There is a surprisingly small variation among stellar

Most stars have hot interiors surrounded by relatively cool atmospheres.The spectrum of such a star consists of

Stars whose intrinsic brightness and period of variation are related are called

At the end of its period in the main sequence, a very heavy star

What keeps light from escaping from a black hole is its

At the end of its period in the main sequence, a star whose mass is near that of the sun

The source of the sun's energy 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

Universe

Filters

Exam 18: The Stars

The main sequence on the HR diagram includes

In the HR diagram, most stars are

White dwarfs are stars that are

The spectrum of a star can provide information of which one or more of the following?

There is a surprisingly small variation among stellar

Most stars have hot interiors surrounded by relatively cool atmospheres.The spectrum of such a star consists of

Stars whose intrinsic brightness and period of variation are related are called

At the end of its period in the main sequence, a very heavy star

What keeps light from escaping from a black hole is its

At the end of its period in the main sequence, a star whose mass is near that of the sun

The source of the sun's energy 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

Universe

Filters