Question

Define conduction convection and radiation

Answer 1

CONDUCTION : The process by which heat or electricity is directly transmitted through the material of a substance when there is a difference of temperature or of electrical potential between adjoining regions, without movement of the material.

CONVECTION: The movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink under the influence of gravity, which consequently results in transfer of heat.

RADIATION:  The emission or transmission of energy in the form of waves or particles through space or through a material medium.

Answer 2

Answer:

conduction => mode of transfer of heat in solids in which heat moves from molecules to molecule without any movement of the molecules themselves

convection => mode of transfer of heat in liquids and gases in which molecules themselves move to carry heat

radiation => mode of transfer of heat which does not require any material medium