Describe what happens to a star, after the main sequence period, for the star to eventually become a black dwarf. (5 Marks)

After the main sequence period, the amount of hydrogen in the stars core decreases causing the star to fuse helium nuclei instead. (Further explanation for clarification)This releases a lot of energy causing the outer layers of the star to expand. (1 mark) The star has become a red giant. (1 mark)Eventually, this red giant ejects its outer layers and shrinks (1 mark) to form a small, hot white dwarf. (1 mark) White Dwarves are smaller than main sequence stars.Over time, white dwarves radiate energy and their temperature decreases. (1 mark) Eventually, they cool so much they no longer emit radiation. (1 mark) A black dwarf has formed.

Answered by Tate C. Physics tutor

12233 Views

See similar Physics GCSE tutors

Related Physics GCSE answers

All answers ▸

Describe the kinetic model composition of a solid


How long have you been studying physics?


What type of radioactive decay reduces the mass number of a nucleus? Explain how it works.


A force of 13.8 N was used to lift a mass 30 cm vertically through a liquid. Calculate the work done in lifting the mass, stating the correct units.


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences