Question 1

What places a limit on the lifetime of a star?

Accepted Answer

A)  Loss of the mass,and therefore of nuclear fuel,of the star into space by stellar winds 
B)  Amount of available nuclear fuel it contains 
C)  Collisions between stars in a galaxy that are sufficiently frequent for all stars to eventually be destroyed in this way 
D)  Buildup of spin as it evolves and contracts,causing it to eventually spin apart 
A)  Loss of the mass,and therefore of nuclear fuel,of the star into space by stellar winds 
B)  Amount of available nuclear fuel it contains 
C)  Collisions between stars in a galaxy that are sufficiently frequent for all stars to eventually be destroyed in this way 
D)  Buildup of spin as it evolves and contracts,causing it to eventually spin apart

Question 2

After a star becomes a red giant,hydrogen fusion

Accepted Answer

A)  no longer occurs. 
B)  occurs in the core. 
C)  occurs in a shell around the core. 
D)  occurs only during the helium flash. 
A)  no longer occurs. 
B)  occurs in the core. 
C)  occurs in a shell around the core. 
D)  occurs only during the helium flash.

Question 3

A white dwarf is approximately the same size as Earth.

Accepted Answer

A) True 
 B)False

What places a limit on the lifetime of a star?

After a star becomes a red giant,hydrogen fusion

A white dwarf is approximately the same size as Earth.

Predicting the Motions of the Stars, Sun, and Moon

Decoding the Hidden Messages in Starlight

Analyzing Scales and Motions of the Universe

Exploring Our Evolving Solar System

Uncovering Earths Systems

Exploring Terrestrial Surface Processes and Atmospheres

Observing the Dynamic Giant Planets

Looking for Life Beyond Earth

Probing the Dynamic Sun

Observing Properties of Distant Stars

Predicting the Violent End of the Largest Stars

Exploring Our Galaxy

Investigating Other Galaxies

Observing the Evolution of the Universe

Filters

Exam 11: Inferring Patterns in Star Life Cycles

What places a limit on the lifetime of a star?

After a star becomes a red giant,hydrogen fusion

A white dwarf is approximately the same size as Earth.

Predicting the Motions of the Stars, Sun, and Moon

Decoding the Hidden Messages in Starlight

Analyzing Scales and Motions of the Universe

Exploring Our Evolving Solar System

Uncovering Earths Systems

Exploring Terrestrial Surface Processes and Atmospheres

Observing the Dynamic Giant Planets

Looking for Life Beyond Earth

Probing the Dynamic Sun

Observing Properties of Distant Stars

Predicting the Violent End of the Largest Stars

Exploring Our Galaxy

Investigating Other Galaxies

Observing the Evolution of the Universe

Filters