Astronomy quiz question: K5 giant vs. M0 supergiant

Astronomy 210 Quiz 5, fall semester 2017
Cuesta College, San Luis Obispo, CA

A K5 giant has a ___________ than a M0 supergiant.
(A) brighter luminosity.
(B) larger size.
(C) hotter temperature.
(D) (Two of the above choices.)
(E) (All of the above choices.)
(F) (None of the above choices.)

Correct answer (highlight to unhide): (C)

An H-R diagram is provided with this quiz.


These stars are plotted on an H-R diagram below. While the K5 giant has a dimmer luminosity and a smaller size, it has a hotter temperature than the M0 supergiant.


Section 70158
Exam code: quiz05Sbn3
(A) : 2 students
(B) : 2 students
(C) : 34 students
(D) : 3 students
(E) : 0 students
(F) : 3 students

Success level: 79% (including partial credit for multiple-choice)
Discrimination index (Aubrecht & Aubrecht, 1983): 0.41

Section 70160
Exam code: quiz05n3Rw
(A) : 3 students
(B) : 1 student
(C) : 18 students
(D) : 2 students
(E) : 1 student
(F) : 3 students

Success level: 76% (including partial credit for multiple-choice)
Discrimination index (Aubrecht & Aubrecht, 1983): 0.63