AST1002 FINAL Ch. 12

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このセットの用語数：(14)

Which stars live longer?

When does a star leave the main sequence?

When the hydrogen fuel is used up at the core

A low-mass red giant star's energy comes from:

hydrogen burning to helium in a shell surrounding its core

Why does fusion stop when carbon is formed at the core of a low mass star?

Carbon requires extremely high temperature to fuse and for a
low mass star the temperature never gets that high

Which of the following is the correct order for the stages of evolution of the Sun?

Main sequence, red giant, planetary nebula, white dwarf

The space between stars is now known to contain

gas, made up of atoms, and dust particles

What factor is most important in determining a star's position on the main sequence and subsequent evolution?

As a main sequence star burns its core supply of hydrogen, what happens?

Helium builds up as ash in the core

A main sequence star is unique because

hydrogen burning occurs in its core

The luminosity of a star depends on

its mass and its age

About how long will a 2-M star live as a main-sequence star?

1 billion years

A low-mass red giant star's energy comes from

hydrogen burning to helium in a shell surrounding its core

When a G2 star leaves the main sequence, its luminosity

increases and its surface temperature decreases

As a red giant star evolves, hydrogen shell burning proceeds increasingly faster due to

heat released from the core's contraction

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