Ch. 26.3 - The Life Cycle of Stars

Ch. 26.3

The Life Cycle of Stars

Fill in the Blanks

A large cloud of dust and gas spread out over a large volume of space is called a(n)

.

Multiple Select

Select each sentence that is true about a protostar.

• nuclear fusion is taking place within it.

• it has enough mass to form a star.

• its internal pressure and temperature continue to rise as it contracts.

• it is a contracting cloud of gas and dust.

Fill in the Blanks

A star’s

determines the star’s place on the main sequence and how long it will stay there.

Multiple Select

Select each true sentence about adult main-sequence stars.

• High-mass stars become the bluest and brightest main-sequence stars.

• low-mass stars are usually short-lived.

• yellow stars like the sun are in the middle of the main sequence.

• red stars are the hottest and brightest of all visible stars.

Fill in the Blanks

The core of a star starts to shrink when the core begins to run out of

.

Open Ended

Name the three possible end stages of a star.

Multiple Choice

True or False? The final stages of a star’s life depend on its mass.

• True

• False

Fill in the Blanks

The glowing cloud of gas that surrounds a dying low- or medium-mass star is called a(n)

.

Multiple Choice

True or false? A high-mass star dies quickly because it consumes fuel rapidly.

• True

• False

Fill in the Blanks

An explosion so brilliant that a dying high-mass star becomes more brilliant than an entire galaxy is called a(n)

.