Answer:
Conduction is the transfer of thermal energy through direct contact. Convection is the transfer of thermal energy through the movement of a liquid or gas. Radiation is the transfer of thermal energy through thermal emission.
Without an external agent doing work, heat will always flow from a hotter to a cooler object. Two objects of different temperature always interact. There are three different ways for heat to flow from one object to another. They are conduction, convection, and radiation.
Metals conduct electricity and heat better than nonmetals because their electrons can move more easily and thereby transfer energy. Also, metals have a more solid crystalline structure with less space between the electrons. ... Because electrons can move easily from atom to atom, they can carry thermal energy with them.
You can feel the heat transfer from a fire and from the Sun. Similarly, you can sometimes tell that the oven is hot without touching its door or looking inside—it may just warm you as you walk by.
