Enana blanca

The transcript explains the characteristics and final evolutionary stage of a white dwarf star. It highlights the high temperature and low luminosity of a white dwarf, which has ceased nuclear fusion and exhausted its nuclear fuel. The remaining core, composed of carbon and oxygen, gradually cools over time. Most stars, including the sun, will eventually become white dwarfs as they reach the end of their life cycle.

What are the defining characteristics of a white dwarf?

• Low temperature and high luminosity

• Low temperature and low luminosity

• High temperature and low luminosity

• High temperature and high luminosity

At what stage is a white dwarf in its life cycle?

• Rebirth stage

• Final stage

• Middle stage

• Initial stage

What happens to the nuclear fuel in a white dwarf?

• It is completely exhausted

• It remains unused

• It is partially used up

• It is continuously replenished

What elements primarily make up the core of a white dwarf?

• Iron and nickel

• Hydrogen and helium

• Carbon and oxygen

• Silicon and sulfur

How do most stars, including the sun, end their life cycle?

• As a neutron star

• As a black hole

• As a supernova

• As a white dwarf