Exam 13: Stellar Evolution: the Lives and Deaths of Stars

An iron core cannot support a star because

A(n) represents a relatively peaceful mass loss as a red giant becomes a white dwarf.

What can you conclude about a Type I supernova?

Blue stragglers are only found in _.

For the Pleiades, a fifty- million- year- old cluster, we find classes _ and _ already leaving the main sequence, making the seven bright giants in the "seven sisters."

Globular cluster stars are _ in heavy elements than those in open clusters.

Stars of types and _ are found only in the youngest star clusters.

Because they all involve the detonation of a carbon- rich white dwarf at the Chandrasekhar limit, all Type I supernovae are approximately equally luminous.

As a star's evolution approaches the Type II supernova, we find

A carbon- detonation supernova starts out as a white dwarf in a close binary system.

The star clusters are younger, and their stars richer in heavier elements released in supernova events.

For a white dwarf to explode entirely as a Type I supernova, its mass must be

When a star's inward gravity and outward pressure are balanced, the star is said to be

The initial mass of a protostar generally determines the star's future evolution. But in some cases, what can alter this process?

During the red giant phase, a star's mass _.

Our Sun will eventually become a red giant, then expel a(n) and collapse into a white dwarf.

If a white dwarf gains enough mass from a nearby star to exceed its Chandrasekhar limit it will become a nova.

A 20- solar- mass star will stay on the main sequence for 10 million years, yet its iron core can exist for only a

A star on the red giant branch has a core about the size of .

Globular clusters are dominated by bright red supergiants at the top right of the H- R diagram.