Conduction is when heat or electricity moves from one place to

another. If you've ever felt a shock while putting on a sweater,

you have participated in electrical conduction.

Radiation is energy transmitted in waves or a stream of

particles. The first thing you think of as radiation is probably X-

rays, but what cooks your food in the microwave oven is

also radiation.

1. Convection is heat transfer by mass motion of a fluid such as air or water when the heated fluid is caused to move away from the source of heat, carrying energy with it. Convection above a hot surface occurs because hot air expands, becomes less dense, and rises (see Ideal Gas Law).