20171102

Astronomy quiz question: smallest star?

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

Which star is the smallest?
(A) M0 red dwarf.
(B) F5 white dwarf.
(C) B0 main sequence star.
(D) B5 supergiant.
(E) (There is a tie.)

Correct answer (highlight to unhide): (B)

An H-R diagram is provided with this quiz.


These stars are plotted on an H-R diagram below. The B5 supergiant is the largest in size, followed by the B0 main-sequence star, the M0 red dwarf, and the F5 white dwarf is the smallest.


Section 70158
Exam code: quiz05Sbn3
(A) : 13 students
(B) : 23 students
(C) : 1 student
(D) : 4 students
(E) : 3 students

Success level: 57% (including partial credit for multiple-choice)
Discrimination index (Aubrecht & Aubrecht, 1983): 25

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