Astronomy quiz question: K5 giant vs. M5 red dwarf

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

A K5 giant can have the same __________ as an M5 red dwarf.
(A) luminosity.
(B) size.
(C) temperature.
(D) (Two of the above choices.)
(E) (All of the above choices.)
(F) (None of the above choices.)

Correct answer (highlight to unhide): (F)

An H-R diagram is provided with this quiz.


These stars are plotted on an H-R diagram below. The K5 giant has a brighter luminosity, higher temperature, and a larger size than the M5 red dwarf.


Section 30674
Exam code: quiz05ne0W
(A) : 2 students
(B) : 1 student
(C) : 4 students
(D) : 0 students
(E) : 0 students
(F) : 15 students

Success level: 69% (including partial credit for multiple-choice)
Discrimination index (Aubrecht & Aubrecht, 1983): 0.60

Section 30676
Exam code: quiz05s4Ha
(A) : 4 students
(B) : 2 students
(C) : 12 students
(D) : 3 students
(E) : 0 students
(F) : 20 students

Success level: 52% (including partial credit for multiple-choice)
Discrimination index (Aubrecht & Aubrecht, 1983): 0.92