Heat transfer

Conduction, Convection and Radiation

Heat Transfer

Heat transfer is the movement of thermal energy from one thing to another thing of different temperature. These objects can be either solids, liquids or even gases from.

Conduction, Convection and Radiation

Heat transfers from one place to another by three methods- conduction, convection and radiation.

CONDUCTION- Conduction is when a non-flammable object of heated and the particles of the object start to get hotter and hotter then start to vibrate. As they vibrate, they hit other particles and they also start to vibrate until the whole object is heated from top to bottom.

CONVECTION- Convection is when the heated air in an object or place starts a cycle by the heated air going up and the cooled air going down. When the heated air gets cooled down and the cooled air gets heated, the cool (heated) air goes up and the heated (cooled) air goes down. Then the cycle keeps on repeating.

RADIATION- Radiation is when heat transfers from one place to another using invisible waves. All objects radiate but dark and hot objects radiate more heat than light or cool objects.

Uses of heat transfer in everyday life

- Cooling objects

- Heating objects

- On the stove

- In the oven

- In the toaster