Astronomy current events question: meteoritic origin of Egyptian Beads

Astronomy 210L, fall semester 2013
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!)

Ashley Feinberg, "Archaeologists Just Realized 5K-Year-Old Egyptian Beads Are From Space," August 20, 2013
http://gizmodo.com/archaeologists-just-realized-5k-year-old-egyptian-beads-1171689255

University College London researchers measured the __________ of ancient Egyptian jewelry using x-rays to determine that it was made from meteorites.
(A) composition of trace metals.
(B) tool-working patterns.
(C) radioactivity levels.
(D) carbon dating.
(E) water content.

Correct answer: (A)

Student responses
Sections 70178, 70186, 70200
(A) : 55 students
(B) : 1 student
(C) : 6 students
(D) : 5 students
(E) : 1 student