Describe the method the student would have used to obtain the results in Figure 3.

Start after all of the cubes of potato have been cut. Also consider variables he should have controlled.

The loss in mass shown in Figure 3 is due to osmosis. The rate of osmosis between 0 and 40 minutes is faster in B (the eight small cubes) than in A (single large cube).

Is the rate of osmosis per mm2 per minute different between A and B during this time? Use appropriate calculations to support your answer.