There are many different kinds of metal. The metals that are used in everyday life are hard, usually shiny, and smooth. Metals are good conducters, which means they can change temperature very fast. If you stir some hot water with a metal spoon for too long you can burn your fingers as the spoon heats up. Most metal is soft enough to be bent into interesting shapes, although for very thick metal it can take a lot of force to bend it. Some metal, like the kind that goes into knife blades, is hardened and can't be bent.