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

Question

Quizplus · Accepted Answer

Nuclear fusion is the process by which stars generate energy by fusing nuclei of lighter elements into heavier elements in their cores. Gravitational contraction, on the other hand, is the process by which a star's own gravity compresses its core, releasing heat and energy in the process. Together, these two processes work to generate the internal thermal pressure that helps a star maintain its shape and structure. Option B is incorrect because nuclear fission is not a process that occurs in stars, and supernova events do not help stars maintain their internal thermal pressure. Option C is incorrect because while supernovae events can generate huge amounts of energy, they ultimately result in the destruction of the star rather than helping it maintain its internal thermal pressure. Option D is incorrect because while nuclear fission is a process that can generate energy, it does not occur naturally in stars, and is not a significant source of energy for most stars.

Which Two Processes Can Generate Energy to Help a Star