Astronomy quiz question: rapid fusion rates

Astronomy 10 Quiz 9, Spring Semester 2008
Cuesta College, San Luis Obispo, CA

Astronomy 10 learning goal Q9.3

[3.0 points.] Which one of the following choices best explains why the fusion rate in the core of a massive main sequence star is more rapid than the core of a less massive main sequence star?
(A) The core of a massive main sequence star contains more hydrogen.
(B) The core of a massive main sequence star is younger.
(C) The core of a massive main sequence star has a higher temperature and pressure.
(D) The core of a massive main sequence star does not have as much convection currents to stir up hydrogen.
(E) The core of a massive main sequence star does not have as much degeneracy pressure.

Correct answer: (C)

(Cf. previous post on main sequence lifetimes.)

Student responses
Section 5166
(A) : 12 students
(B) : 1 student
(C) : 39 students
(D) : 2 students
(E) : 1 student