Convection is the transfer of thermal energy by means of current in liquid or gas.
It involves the movement of the fluids from a hotter region to a colder region.
It only takes place in liquid and gas.
How does it work?
Based on the theory of warm air rises and cool air sinks, convection happens. It only takes place in liquids and gases since it involves the bulk movement of the fluids which solids can never do since their particles are packed tightly together.
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