Astronomy current events question: Saturn "rain"

Astronomy 210L, fall semester 2011
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!)
Denise Chow, "Aha! Icy Moon 'Rain' Creates the Water on Saturn," July 27, 2011
According to observations from the ESA Herschel Space Observatory, water raining down on Saturn may come from:
(A) icy geysers on its moon, Enceladus.
(B) comet fragments.
(C) intense lightning storms in its atmosphere.
(D) its greenhouse effect.
(E) the disrupted formation of a small icy moon.

Correct answer: (A)

Student responses
Sections 70178, 70186, 70200
(A) : 23 students
(B) : 2 students
(C) : 2 students
(D) : 3 students
(E) : 1 student

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