Which two processes can generate energy to help a star maintain its internal thermal pressure?
A) Nuclear fusion and gravitational contraction
B) Nuclear fusion and nuclear fission
C) Nuclear fusion and supernova
D) Nuclear fission and supernova

Question

Quizplus · Accepted Answer

Nuclear fusion is the process by which stars generate energy by fusing lighter elements into heavier ones. This process maintains the star's internal thermal pressure. Gravitational contraction is another process that generates energy by compressing the star's core, which increases the temperature and pressure, causing fusion to occur. Nuclear fission is not a process that occurs in stars, and supernova only occurs at the end of a star's life cycle.

Which Two Processes Can Generate Energy to Help a Star