Question 1

Stars support their weight by generating ____.

Accepted Answer

A)  magnetic fields throughout the star 
B)  Magnetic fields throughout the star 
C)  energy in their centers 
D)  magnetic-plasmas at their core 
E)  energy-plasmas at their core 
A)  magnetic fields throughout the star 
B)  Magnetic fields throughout the star 
C)  energy in their centers 
D)  magnetic-plasmas at their core 
E)  energy-plasmas at their core

Question 2

A open star cluster will have a(n) _____________ turn-off point than an older star cluster.

Accepted Answer

blue,bluei

Question 3

Helium fusion is sometimes referred to as the _______________  because three helium nuclei are needed to make a carbon nucleus, and because the helium nucleus is called an alpha particle.

Accepted Answer

triple alp

Question 4

All the elements heavier than helium on the periodic table, including the ones in your body, were created in the cores of massive stars.

Accepted Answer

A) True 
 B)False

Question 5

List the four laws of stellar structure.

Accepted Answer

1 hydrostatic equili

Question 6

A(n) _______________star is any star that changes its brightness significantly and repeatedly.

Accepted Answer

variable,Cepheid,Cep

Question 7

Figure: Main-Sequence Stars What is the approximate age of the star cluster in the accompanying figure?

Accepted Answer

A)  10 million years 
B)  100 million years 
C)  10 billion years 
D)  100 billion years 
E)  Cannot be determine from the given data. 
A)  10 million years 
B)  100 million years 
C)  10 billion years 
D)  100 billion years 
E)  Cannot be determine from the given data.

Question 8

To determine the structure of the interior of a star, astronomers must balance density, luminosity, and ____.

Accepted Answer

A)  mass 
B)  temperature 
C)  mass and temperature 
D)  mass and opacity 
E)  temperature and opacity 
A)  mass 
B)  temperature 
C)  mass and temperature 
D)  mass and opacity 
E)  temperature and opacity

Question 9

What is the upper limit of a brown dwarf's size?

Accepted Answer

A)  no upper limit 
B)  0.50 solar masses 
C)  0.10 solar masses 
D)  0.08 solar masses 
E)  less than 0.08 solar masses 
A)  no upper limit 
B)  0.50 solar masses 
C)  0.10 solar masses 
D)  0.08 solar masses 
E)  less than 0.08 solar masses

Question 10

The two elements a one-solar-mass star uses over the course of its entire evolution are   _______________ and _____________.

Accepted Answer

hydrogen;

Question 11

As a star like the Sun exhausts hydrogen in its core, the outer layers of the star become hotter and more luminous.

Accepted Answer

A) True 
 B)False

Stars support their weight by generating ____.

A open star cluster will have a(n) _____________ turn-off point than an older star cluster.

Helium fusion is sometimes referred to as the _______________ because three helium nuclei are needed to make a carbon nucleus, and because the helium nucleus is called an alpha particle.

All the elements heavier than helium on the periodic table, including the ones in your body, were created in the cores of massive stars.

List the four laws of stellar structure.

A(n) _______________star is any star that changes its brightness significantly and repeatedly.

Figure: Main-Sequence Stars What is the approximate age of the star cluster in the accompanying figure?

To determine the structure of the interior of a star, astronomers must balance density, luminosity, and ____.

What is the upper limit of a brown dwarf's size?

The two elements a one-solar-mass star uses over the course of its entire evolution are ___ and _.

As a star like the Sun exhausts hydrogen in its core, the outer layers of the star become hotter and more luminous.

Here and Now

A Users Guide to the Sky

Moon Phases and Eclipses

Origins of Modern Astronomy

Gravity

Light and Telescopes

Atoms and Spectra

The Sun

The Family of Stars

The Interstellar Medium

Formation and Structure of Stars

Deaths of Stars

Neutron Stars and Black Holes

The Milky Way Galaxy

Galaxies

Supermassive Black Holes and Active Galaxies

Modern Cosmology

Origin of the Solar System and Extrasolar Planets

Earth the Active Planet

The Moon and Mercury

Venus and Mars

Jupiter and Saturn

Uranus Neptune Pluto and the Kuiper Belt

Meteorites Asteroids and Comets

Astrobiology

Filters

Exam 12: Stellar Evolution

Stars support their weight by generating ____.

A open star cluster will have a(n) _____________ turn-off point than an older star cluster.

Helium fusion is sometimes referred to as the _______________ because three helium nuclei are needed to make a carbon nucleus, and because the helium nucleus is called an alpha particle.

All the elements heavier than helium on the periodic table, including the ones in your body, were created in the cores of massive stars.

List the four laws of stellar structure.

A(n) _______________star is any star that changes its brightness significantly and repeatedly.

Figure: Main-Sequence Stars What is the approximate age of the star cluster in the accompanying figure?

To determine the structure of the interior of a star, astronomers must balance density, luminosity, and ____.

What is the upper limit of a brown dwarf's size?

The two elements a one-solar-mass star uses over the course of its entire evolution are _______________ and _____________.

As a star like the Sun exhausts hydrogen in its core, the outer layers of the star become hotter and more luminous.

Here and Now

A Users Guide to the Sky

Moon Phases and Eclipses

Origins of Modern Astronomy

Gravity

Light and Telescopes

Atoms and Spectra

The Sun

The Family of Stars

The Interstellar Medium

Formation and Structure of Stars

Deaths of Stars

Neutron Stars and Black Holes

The Milky Way Galaxy

Galaxies

Supermassive Black Holes and Active Galaxies

Modern Cosmology

Origin of the Solar System and Extrasolar Planets

Earth the Active Planet

The Moon and Mercury

Venus and Mars

Jupiter and Saturn

Uranus Neptune Pluto and the Kuiper Belt

Meteorites Asteroids and Comets

Astrobiology

Filters

The two elements a one-solar-mass star uses over the course of its entire evolution are ___ and _.