The top of a pizza cooks via radiation Most of the time, in cooking, all three methods of heat transfer are used to varying extents Take a burger on the grill, for example The grill grate heats the patty directly where it is in contact with it through conduction, rapidly browning it at those spots The rest of underside of the patty is cooked via radiation from the coals underneath Place a piece of cheese on the burger and pop the lid down for a bit, and convection currents will form, carrying the hot air from directly above the coals up and over the top of the burger, melting the cheese Grilled burgers cook through all three forms of energy transfer You might notice that these three types of heat transfer heat only onto the surface of foods In order for food to cook through to the center, the outer layer must transfer its heat to the next layer, and so on, until the very center of the food begins to warm up Because of that, the outside of most cooked foods will almost always be more well done than the center (there are tricks to minimizing the gradient, which we’ll get to in time) Microwaves are the only other standard method of energy transfer we commonly use in the kitchen, and they have the unique ability to penetrate through the exterior of ... heat only onto the surface of foods In order for food to cook through to the center, the outer layer must transfer its heat to the next layer, and so on, until the very center of the food begins... that, the outside of most cooked foods will almost always be more well done than the center (there are tricks to minimizing the gradient, which we’ll get to in time) Microwaves are the only other...directly above the coals up and over the top of the burger, melting the cheese Grilled burgers cook through all three forms of energy transfer You might notice that these three types of