Astronomy current events question: Phobos' surface egrooves

Astronomy 210L, fall semester 2015
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!)
Elizabeth Zubritsky, "Mars’ Moon Phobos is Slowly Falling Apart" (November 10, 2015)
Computer models indicate that the grooves on Mars' moon Phobos may be produced by:
(A) solar heating.
(B) convection currents.
(C) cryovolcanoes.
(D) Mars' gravity.
(E) its rapid rotation.

Correct answer: (D)

Student responses
Sections 70178, 70186
(A) : 1 student
(B) : 3 students
(C) : 1 student
(D) : 15 students
(E) : 0 students

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