How Lower Main Sequence Stars Die

What is the mass range of red dwarf stars?

• 1.1 to 2.0 solar masses

• 0.5 to 1.0 solar masses

• 2.1 to 3.0 solar masses

• 0.08 to 0.4 solar masses

What process allows red dwarfs to use their hydrogen fuel efficiently?

• Fusion

• Conduction

• Convection

• Radiation

Tags

NGSS.HS-ESS1-1

What is the main reason red dwarfs have such long lifespans?

• They use convection to mix hydrogen

• They have a helium core

• They are very massive

• They burn hydrogen quickly

What happens to medium-mass stars when they can't ignite their carbon core?

• They turn into black holes

• They collapse into white dwarfs

• They become red giants

• They explode as supernovae

What is the process of carbon fusion?

• Consuming carbon to produce helium

• Consuming carbon to produce nitrogen

• Consuming carbon to produce hydrogen

• Consuming carbon to produce oxygen, neon, sodium, and magnesium

Why can't medium-mass stars ignite their carbon core?

• They are not massive enough

• They lack a helium core

• They are too cold

• They have too much hydrogen

What is the fate of a red dwarf star?

• It becomes a black hole

• It has not yet died of old age

• It explodes as a supernova

• It becomes a neutron star

Tags

NGSS.HS-ESS1-3

What is the main sequence?

• A stage where stars are born

• A stage where stars die

• A stage where stars explode

• A stage where stars are stable and burn hydrogen

Tags

NGSS.HS-ESS1-1

What is the role of convection in red dwarfs?

• It prevents hydrogen from burning

• It allows uniform use of hydrogen throughout the star

• It creates a helium core

• It causes the star to expand

What happens when the hydrogen in a medium-mass star's core is used up?

• The star becomes a red dwarf

• The star becomes a black hole

• The core becomes a helium core surrounded by a hydrogen shell

• The star explodes

Tags

NGSS.HS-ESS1-1