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!)
Eric Hamilton, "Earth's Last Magnetic Field Reversal Took Far Longer than Once Thought" (August 7, 2019)Analysis of magnetic iron in ancient __________ provide evidence that Earth's most recent magnetic field reversal took far longer than previously estimated.
news.wisc.edu/earths-last-magnetic-field-reversal-took-far-longer-than-once-thought/
(A) tree rings.
(B) lava flows.
(C) petroglyphs.
(D) papyrus ink.
(E) plankton fossils.
Correct answer: (B)
Student responses
Sections 70178, 70186
(A) : 2 students
(B) : 34 students
(C) : 2 students
(D) : 0 students
(E) : 6 students
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