CONVECTION

Convection is the transferenre of heat in a fluid(gas or liquid)by the movement of molecules. If one corner of a boul of water is heated,the water particles move about and the heat is distributed throughout the entire body of water.if, small visible dust partical is present in the boul of water,it will be observed that the convection current in the water follow definite patterns. On the earth surface,heat i7 transferred from one place to another by ocean currents and also by convection current of air.