Astronomy current events question: Dione's impact crater rays

Astronomy 210L, spring semester 2017
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!)
NASA/JPL-Caltech/Space Science Institute, "Rays of Creusa" (February 20, 2017)
Rays of lighter ejected material from an impact crater on Saturn's moon, Dione observed by NASA's Cassini spacecraft can be used to determine the __________ of geological features on its surface.
(A) chemical composition.
(B) sequence of events.
(C) radioactivity.
(D) water content.
(E) roughness.

Correct answer: (B)

Student responses
Sections 30679, 30680
(A) : 10 students
(B) : 12 students
(C) : 1 student
(D) : 2 students
(E) : 6 students

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