Cuesta College, San Luis Obispo, CA
Which star is the hottest?
(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): (B)
An H-R diagram is provided with this quiz.
These stars are plotted on an H-R diagram below. The B5 main sequence star is the hottest, followed by the A0 white dwarf, the K5 giant, and the M0 main sequence star (red dwarf) is the coolest. Instead of using the H-R diagram, the OBAFGKM mnemonic can be used to determine the temperatures of these stars from their spectral type.
Section 70158
Exam code: quiz05T3rA
(A) : 2 students
(B) : 0 students
(C) : 0 students
(D) : 20 students
(E) : 0 students
Success level: 78% (including partial credit for multiple-choice)
Discrimination index (Aubrecht & Aubrecht, 1983): 0.67
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