Through the use of common household items such as aluminum pans and thermometers, students will investigate how the size and shape of an object affect the rate of heat loss from the object to the environment. This lesson is relevant to biology, as it relates to the size and shape of animals, their metabolism, and their ability to live in very cold or hot environments. A rate of heat loss that is too fast or too slow may affect the survival of an organism. By modeling different shapes and sizes of organisms using containers of various sizes, students explore how these variables affect the rate of heat loss.