Astronomy current events question: detecting Enceladus' underground ocean

Astronomy 210L, spring semester 2014
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!)
Dwayne Brown, Jane Platt, and Brian Bell, "NASA Space Assets Detect Ocean inside Saturn Moon," April 3, 2014
NASA's Deep Space Network observed the Cassini spacecraft __________ to determine that Saturn's moon, Enceladus, has a large underground ocean.
(A) fluctuating in temperature.
(B) passing behind water vapor geysers.
(C) deviating from its flight path.
(D) covered by icy particles.
(E) reflecting laser beams.

Correct answer: (C)

Student responses
Sections 30678, 30679, 30680
(A) : 6 students
(B) : 18 students
(C) : 15 students
(D) : 3 students
(E) : 2 students

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