Astronomy current events question: cross-hatched rocks on Mars

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!)
Guy Webster, Laurie Cantillo, and Dwayne Brown, "Mars Rover Curiosity Examines Possible Mud Cracks" (January 17, 2017)
NASA's Curiosity Mars rover examined rocks cross-hatched with shallow ridges, which may have been caused by:
(A) glacier motion.
(B) rocks rolling downstream.
(C) tectonic plates.
(D) chaotic sandstorm winds.
(E) drying mud.

Correct answer: (E)

Student responses
Sections 30679, 30680
(A) : 2 students
(B) : 14 students
(C) : 10 students
(D) : 1 student
(E) : 20 students

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