Astronomy current events question: atmospheric changes on Titan

Astronomy 210L, fall 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!)

Jia-Rui Cook, Elizabeth Zubritsky, Nancy Neal-Jones, "NASA's Cassini Sees Abrupt Turn in Titan's Atmosphere," November 28, 2012
http://www.nasa.gov/mission_pages/cassini/whycassini/cassini20121128.html

NASA's Cassini spacecraft observed atmospheric changes on Saturn's moon, Titan, which may be caused by:
(A) changing seasons.
(B) Saturn's magnetic fields.
(C) hydrocarbon volcanoes.
(D) polar lightning storms.
(E) molten core circulation.

Correct answer: (A)

Student responses
Sections 70178, 70186, 70200
(A) : 11 students
(B) : 12 students
(C) : 4 students
(D) : 4 students
(E) : 3 students