Astronomy current events question: Sagittarius A* x-ray flares

Astronomy 210L, spring semester 2012
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!)
Trent J. Perrotto, Megan Watzke, and Janet Anderson, "NASA's Chandra Finds Milky Way's Black Hole Grazing on Asteroids," February 8, 2012
According to UK researchers, daily x-ray flares detected by NASA's Chandra X-ray Observatory may be due to __________ the supermassive black hole Sagittarius A* at the center of the Milky Way.
(A) asteroids vaporized and devoured by.
(B) supernovae triggered by.
(C) matter and antimatter ejected from.
(D) a wormhole connected to.
(E) superheated plasma surrounding.

Correct answer: (A)

Student responses
Sections 30678, 30679, 30680
(A) : 38 students
(B) : 3 students
(C) : 6 students
(D) : 0 students
(E) : 4 students

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