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Conceptest: Ozone umbrella analogy

David McConnell, Department of Marine, Earth, and Atmospheric Sciences, North Carolina State University
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This material is replicated on a number of sites as part of the SERC Pedagogic Service Project

Question:


Which statement is the best analogy?
A. An umbrella is to rain as the stratosphere is to solar radiation.
B. An umbrella is to rain as the stratosphere is to ultraviolet radiation.
C. An umbrella is to rain as the ozone layer is to solar radiation.
D. An umbrella is to rain as the ozone layer is to ultraviolet radiation.

Student Responses:

These responses were collected from students (mostly freshmen, non-majors) in multiple large Earth Science classes (60+ students) at an open-enrollment, Midwestern university. N=147 students on first attempt; 157 after peer instruction.
A. 12% of students selected this answer on their 1st attempt; 4% after peer instruction.
B. 18% of students selected this answer on their 1st attempt; 5% after peer instruction.
C. 26% of students selected this answer on their 1st attempt; 11% after peer instruction.
D. 44% of students selected this answer on their 1st attempt; 80% after peer instruction.(correct)

References and Notes:

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