Tuesday, October 09, 2007

Depth vs. Depth

One of the questions on the exam I am grading asks the students to pick a physical characteristic of ocean water (pressure, density etc.) and draw a plot of that against depth into the ocean, to show how the measurement changes with depth.

One of the students decided to draw a graph of how depth changes with depth. This would technically be a good answer, except that when she plotted depth against depth she got a parabolic curve.

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