Astronomy quiz question: globular star clusters

Astronomy 210 Quiz 6, fall semester 2011
Cuesta College, San Luis Obispo, CA

The locations of globular star clusters provide evidence for:
(A) dark matter in the halo.
(B) self-sustaining star formation.
(C) the Milky Way's spiral arm structure.
(D) the location of the Milky Way's center.

Correct answer: (D).

The distribution of globular clusters in the halo, above and below the disk, is used to locate the center of the Milky Way.

Section 70158
Exam code: quiz06pOp1
(A) : 2 students
(B) : 1 students
(C) : 6 students
(D) : 23 students

Success level: 75% (including partial credit for multiple-choice)
Discrimination index (Aubrecht & Aubrecht, 1983): 0.56

Section 70160
Exam code: quiz06n4Nd
(A) : 1 student
(B) : 1 student
(C) : 6 students
(D) : 9 students

Success level: 61% (including partial credit for multiple-choice)
Discrimination index (Aubrecht & Aubrecht, 1983): 0.49