Many metals, like silver, copper, gold and aluminum, are good thermal conductors. Thermal conductors are materials that heat passes through easily. Conduction, or the transfer of heat, can take place within a single material or between two objects.Know More
Heat can only travel from a hot material to a cold material. It does not travel in the opposite direction. Materials that do not pass heat easily are known as thermal insulators. Insulators include plastic, wood, rubber and glass. Often, objects that are used to transfer heat are made of metal but have an insulator as a handle. A saucepan is an example of an object that is both a conductor and an insulator. The metal part of the pan is a conductor that allows heat to quickly pass from the stove to the food inside the pan. The metal part of the pan, however, it is too hot to touch without receiving burns. That is why most handles are made of insulators, such as plastic or wood.
Potholders and oven gloves also function as insulators. Some materials, like glass, operate as insulators at room temperature but as conductors when heated to high temperatures. Gases like air also become more conductive when heated to higher temperatures. Metals, when heated, do not conduct heat as well as they do when cooled. Many conductive materials operate better at very low temperatures.Learn More
Thermal energy is used to describe energy in a heated form. Thermal energy is transferred in three different ways: radiation, conduction and convection.Full Answer >
Gases are compressible because they are less dense than other states of matter and have fewer atoms or molecules per unit of volume. Because there is more space between the molecules, it is easy to compress the gas into a smaller space.Full Answer >
A poor conductor of heat is any material that can not transfer heat. Poor conductors have a low density thus the particles in a given volume of the material are not enough to collide and transfer heat. Examples of poor heat conductors include air, wood, paper, cloth and water.Full Answer >
Lithium has a boiling point of 1,342 degrees Celsius and a freezing point of 180.5 degrees Celsius. Due to lithium's high freezing point, it exists as a solid at room temperature.Full Answer >