20181101

Astronomy quiz question: smallest star?

Astronomy 210 Quiz 5, fall semester 2018
Cuesta College, San Luis Obispo, CA

Which star is the smallest?
(A) A0 white dwarf.
(B) B5 main sequence star.
(C) K5 giant.
(D) M0 main sequence star (red dwarf).
(E) (There is a tie.)

Correct answer (highlight to unhide): (A)

An H-R diagram is provided with this quiz.


These stars are plotted on an H-R diagram below. The K5 giant is largest, followed by the B5 main sequence star, M0 red dwarf, and the A0 white dwarf is smallest.


Section 70160
Exam code: quiz05Oor7
(A) : 9 students
(B) : 1 student
(C) : 1 student
(D) : 5 students
(E) : 1 student

Success level: 55% (including partial credit for multiple-choice)
Discrimination index (Aubrecht & Aubrecht, 1983): 0.20

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