Astronomy current events question: inside comet 67P/Churyumov-Gerasimenko

Astronomy 210L, spring semester 2016
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!)

Martin Petzold, Matt Taylor, and Markus Bauer, "Inside Rosetta's Comet" (February 4, 2016)
esa.int/Our_Activities/Space_Science/Rosetta/Inside_Rosetta_s_comet

Comet 67P/Churyumov-Gerasimenko does not have __________, based on measurements of its gravitational influence on the orbiting Rosetta spacecraft.
(A) radioactive energy sources.
(B) a collision course with Earth.
(C) a molten liquid core.
(D) interior caverns.
(E) active cryvolcanoes.

Correct answer: (D)

Student responses
Sections 30678, 30679, 30680
(A) : 8 students
(B) : 2 students
(C) : 9 students
(D) : 20 students
(E) : 1 student