* Cars * Bicycles * Tools * Toys * Wires
* Some metals are very hard and strong. * Metals conduct heat and electricity well.
* YES! * Iron * Steel * Aluminum * Other metals
* Air * Water * Wood * Plastic *
* A material that easily conducts heat energy. * Examples: * Gold * Copper * Silver
* The ability of a material to transfer heat energy.
* Materials that do not conduct heat well. * Examples: * Wood * Plastic * Glass
* Aluminum is a conductor. It transfers heat easily.
* Coolers are made of a material, such as plastic, that is an insulator. The material prevents heat from entering the cooler. Therefore, items in a cooler can remain cool.
* It prevents heat from flowing from the person’s body to the surrounding air.
* To keep warm * To keep objects cool * For cooking
* The handle should be made of an insulator. Insulators do not conduct heat well. A person using the frying pan can grab the handle and not get burned.
* Fur is insulating because it traps a layer of warm air against the body. When fur is wet, it can lose air that was trapped in it. As a result, wet fur is less effective as an insulator.
*I*I nsulators
* Electrical wires are usually made of copper or aluminum. Copper and aluminum are metals, which are good conductors of electricity. They transfer electricity from the outlet to the electronic device.
* Glass is an electrical insulator. It is a nonmetal. Most nonmetallic solids are not good conductors of electricity.
* Rubber is a type of insulator. Rubber gloves can help protect electricians from electric shock.