Astronomy current events question: dark matter detector bubbles

Astronomy 210L, spring semester 2013
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!)

Fermilab press release, "New Dark Matter Detector Begins Search for Invisible Particles," May 2, 2013
http://www.fnal.gov/pub/presspass/press_releases/2013/Dark-Matter-Detector-2013.html

The COUPP-60 detector at the SNOLAB underground laboratory in Ontario, Canada will detect dark matter particles that produce __________ in a tank of water and fire extinguisher chemicals.
(A) bubbles.
(B) antimatter.
(C) neutrinos.
(D) radioactivity.
(E) photons.

Correct answer: (A)

Student responses
Sections 30678, 30679, 30680
(A) : 26 students
(B) : 1 student
(C) : 2 students
(D) : 3 students
(E) : 1 student