Heat transfer

Conduction, Convection, Radiation

Conduction

Heat can be transferred by conduction. When an object is heated, the particles in the object begin to vibrate. These vibrations are passed on through the object, transferring the heat from one end to the other.


An example of conduction A shirt is placed on an ironing board to be ironed.

Convection

Heat can be transferred from one place to another via convection. In convection hotter particles rise and cooler particles fall circulating heat.


An example of convection is when you boil the kettle and the heat from the heat pot boils the water at the bottom and the goes to the top of the kettle.

Radiation


Radiation is the transfer of heat from one place to another using invisible waves. All objects give out heat via radiation but hot objects radiate more heat than cool objects. Dark objects radiate more heat than light objects.


An example of radiation in everyday life is when you touch a dark colored car after it has been sitting in the sun for a while.