Answer:
C
Explanation:
The three methods of heat transfer are: conduction in solids, convection of fluids (liquids or gases), and radiation through anything that will allow radiation to pass.
Heat conduction, also known as thermal conduction, is the transfer of heat through physical contact. It occurs when two objects at different temperatures comes in contact with each other, inducing the transfer of heat based on the temperature difference. This transfer occurs at a molecular level, from one body to another. When heat energy is absorbed by a surface, causing the molecules of that surface to move faster. In the process, they collide with their neighbors with slower molecules and transfers the thermal energy to them.
The process of heat conduction is dependent on temperature gradient/difference, in which heat always flows spontaneously from the hottest to the coldest source, due to the fact that cold is nothing but the absence of heat energy. This transfer between bodies (solids) continues until the temperature difference decays and a state of thermal equilibrium (both bodies at an equal temperature) is attained.
For example, heat in form of thermal energy is transferred from the hot plate of an electric cooker (hotter object) to the metallic surface of a knife (colder object) placed on it.
