Question 1

Variables of a certain type are called Cepheid variables because the first one discovered was in the _____________ Cepheus.

Accepted Answer

The answer of Variables of a certain type are called...

Question 2

Brown dwarfs are ____.

Accepted Answer

A)  stars with a very thick dust sphere around them, so they appear "brown" 
B)  low mass M type stars with hundreds of planets 
C)  an anomaly because they are extremely small but have relatively high temperature 
D)  protostars that could not ignite the fusion of hydrogen at their core 
E)  has a surface temperature of 2500 K by fusing hydrogen 
A)  stars with a very thick dust sphere around them, so they appear "brown" 
B)  low mass M type stars with hundreds of planets 
C)  an anomaly because they are extremely small but have relatively high temperature 
D)  protostars that could not ignite the fusion of hydrogen at their core 
E)  has a surface temperature of 2500 K by fusing hydrogen

Question 3

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

Accepted Answer

variable,Cepheid,Cep

Question 4

Cepheid variables can be used to determine distances because their _____________ can be determined from their _____________.

Accepted Answer

absolute m

Question 5

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 6

The period-luminosity relation for Cepheid and RR Lyrae variable stars can be used for ______________.

Accepted Answer

distance m

Question 7

Why is the Cepheid's period related to their luminosity?

Accepted Answer

The longer-period Cepheids are about 40,

Question 8

When the Sun moves off the main sequence, it will initially become a red supergiant.

Accepted Answer

A) True 
 B)False

Question 9

Astronomers can determine the interiors of main sequence stars by _____.

Accepted Answer

A)  studying their atmospheres 
B)  creating stellar models 
C)  detailed observations of the Sun 
D)  using the Hertzsprung-Russell Stellar Model (HRSM) 
E)  satellite observations of the closest stars 
A)  studying their atmospheres 
B)  creating stellar models 
C)  detailed observations of the Sun 
D)  using the Hertzsprung-Russell Stellar Model (HRSM) 
E)  satellite observations of the closest stars

Question 10

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 11

Explain how the age of a star cluster provides evidence of stellar evolution.

Accepted Answer

All the stars in a cluster are understoo

Variables of a certain type are called Cepheid variables because the first one discovered was in the _____________ Cepheus.

Brown dwarfs are ____.

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

Cepheid variables can be used to determine distances because their _ can be determined from their _.

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

The period-luminosity relation for Cepheid and RR Lyrae variable stars can be used for ______________.

Why is the Cepheid's period related to their luminosity?

When the Sun moves off the main sequence, it will initially become a red supergiant.

Astronomers can determine the interiors of main sequence stars by _____.

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

Explain how the age of a star cluster provides evidence of stellar evolution.

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

Variables of a certain type are called Cepheid variables because the first one discovered was in the _____________ Cepheus.

Brown dwarfs are ____.

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

Cepheid variables can be used to determine distances because their _____________ can be determined from their _____________.

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

The period-luminosity relation for Cepheid and RR Lyrae variable stars can be used for ______________.

Why is the Cepheid's period related to their luminosity?

When the Sun moves off the main sequence, it will initially become a red supergiant.

Astronomers can determine the interiors of main sequence stars by _____.

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

Explain how the age of a star cluster provides evidence of stellar evolution.

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

Cepheid variables can be used to determine distances because their _ can be determined from their _.