Astronomy current events question: supernovae remnants on Earth's ocean bottoms

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!)
Phil Dooley, "Supernovae Showered Earth with Radioactive Debris" (April 7, 2016)
Material found on Earth's ocean bottoms may be remnants of two nearby recent supernova explosions, as determined from its:
(A) speed and trajectory.
(B) radioactivity.
(C) neutrino emissions.
(D) lack of organic compounds.
(E) electrostatic charge.

Correct answer: (B)

Student responses
Sections 30678, 30679, 30680
(A) : 1 students
(B) : 12 students
(C) : 5 students
(D) : 10 students
(E) : 3 students

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