Astronomy current events question: "thick-disk" quasars

Astronomy 210L, spring semester 2015
Cuesta College, San Luis Obispo, CA

Students are assigned to read online articles on current astronomy events, and take a short current events quiz during the first 10 minutes of lab. (This motivates students to show up promptly to lab, as the time cut-off for the quiz is strictly enforced!)
Jennifer Harbaugh, "NASA's Chandra Suggests Black Holes Gorging at Excessive Rates" (April 30, 2015)
NASA's Chandra X-ray Observatory observed ultraviolet and x-ray emissions fainter than expected around supermassive black holes, which may be caused by:
(A) large amounts of infalling material.
(B) cold, dark matter.
(C) antimatter.
(D) neutron stars.
(E) protoplanet formation.

Correct answer: (A)

Student responses
Section 30680
(A) : 9 students
(B) : 4 students
(C) : 1 student
(D) : 2 students
(E) : 0 students

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