1.Discuss how the center temperature changes with time for samples of water and potato. Comment on the shape of the plot.

2.Discuss the effect of air velocity on the freezing time.

3.How does air velocity influence the freezing process?

4.Use an analytical procedure for calculating freezing time (such as Planck's or Pham's method) and compare the results with those you obtained from the experiment.

http://www.rpaulsingh.com/learning/virtual/experiments/freezing/index.html