Stellar Evolution of Low Mass Stars

Which of the following occurs in stage 8, subgiant branch?

• The core contracts

• The surface cools

• the core temperature decreases

• the surface temperature is around 10000K

What are the properties of black dwarfs?

• Is is seen at the right side of the HR diagram

• they have been observed in our galaxy

• they are very large and cold

• they are cold cores of low mass stars

Which of the following is NOT a planetary nebula?

• Dumbbell nebula

• Orion nebula

• Ring nebula

• Cat eye nebula

Which of the following is NOT a property of a white dwarf?

• They are located in the lower left side of the HR diagram

• They are very hot cores of low mass stars

• They have ejected all the gas and only the core remains

• They continue to fuse helium to carbon and hydrogen to helium in shells around the core

Hydrogen shell burning is:

• helium continues to fuse into carbon in the core

• hydrogen continues to fuse into carbon in a shell around the core

• carbon fuses to helium in the core

• hydrogen fuses to helium in a shell around the core

Which of the following does NOT happen during Stage 10?

• helium continues burning

• carbon ash forms in the core

• 80% of the mass is lost

• the brightness decreases

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3

Which of the following does NOT occur in stage 12?

• hydrogen and helium continue to burn in shells

• radius oscillates more and more violently

• burning remains stable

• Envelope of gas is ejected

Tags

NGSS.HS-ESS1-3

The stars located in the lower left corner of the HR diagram are

• giants

• main sequence

• supergiants

• white dwarf

In the HR diagram, the main sequence extends from

• High luminosity, high temperature to low luminosity, low temperature

• high luminosity, low temperature to low luminosity, high temperature

• high luminosity, low temperature to low luminosity, low temperature

• high luminosity, high temperature to low luminosity, high temperature

Most of the stars in a typical HR diagram fall on the

• giant region

• main sequence

• supergiant region

• white dwarf region