Question

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differentiate between conduction and convection

Answer 1

Convection is the transfer of energy by movement of a medium, whereas radiation is the transfer of energy by, well, thermal radiation. Conduction also requires a medium, but, again, it is a fundamentally different mechanism than either convection or radiation; in this case it is the transfer of energy through a medium.

Answer 2

Conduction is transfer of heat in a solid. when heat from hotter end of the solid reaches the colder end with the vibration of molecules.
Convention is transfer of heat when hotter molecules itself move from hotter part to colder. this takes place mainly in liquids and gases.