Astronomy current events question: recent ages of Mars' lakes

Astronomy 210L, fall 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!)
Guy Webster, Dwayne Brown, and Laurie Castillo, "Some Ancient Mars Lakes Came Long After Others" (September 15, 2016)
Some ancient lakes on Mars may have formed relatively recently, as determined by comparing inlet valley features with the ages of overlapping:
(A) glaciers.
(B) lava flows.
(C) sedimentary layers.
(D) rift zones.
(E) impact craters.

Correct answer: (E)

Student responses
Sections 70178, 70186
(A) : 2 students
(B) : 2 students
(C) : 13 students
(D) : 2 students
(E) : 8 students

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