Cuesta College, San Luis Obispo, CA
Which star is the hottest?
(A) A5 main sequence star.
(B) F0 supergiant.
(C) B5 white dwarf.
(D) M0 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 M0 red dwarf is the coolest, followed by the F0 giant, A5 main-sequence star, and the B5 white dwarf is the hottest, with a temperature of just under 20,000 K.
Exam code: quiz05Sh0w
(A) : 1 student
(B) : 2 students
(C) : 22 students
(D) : 2 students
(E) : 1 student
Success level: 77% (including partial credit for multiple-choice)
Discrimination index (Aubrecht & Aubrecht, 1983): 0.75