What is cooking? I have read many definitions, but the one I like best is simply the preparation of food for human consumption. Although an apple doesn’t require much more than washing before being eaten, much of the time cooking involves heating ingredients to change their structure and taste, and sometimes, to make them more digestible. When you heat your dinner, do you give much thought as to how the heat gets from its source into your food? Possibly not. A basic understanding of the phy...