Astronomy 210 Final Exam, fall semester 2009
Cuesta College, San Luis Obispo, CA
Halo stars of the Milky Way would not be likely places to find life because halo stars:
(A) are metal-poor.
(B) are not massive enough.
(C) are not old enough.
(D) have too much dark matter.
Correct answer (highlight to unhide): (A)
Halo stars are the first generation of stars born in the Milky Way, and thus would be metal-poor, as well as their planets, which would then not have "metals" (any elements heavier than hydrogen, which would include carbon and oxygen).
Section 70160
(A) : 27 students
(B) : 4 students
(C) : 4 students
(D) : 6 students
Success level: 69% (including partial credit for multiple-choice)
Discrimination index (Aubrecht & Aubrecht, 1983): 0.11
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