How does heat flow in different materials and substances?

Heat flows differently in different materials and substances based on their properties. In conductors like metals, heat flows quickly through the material due to the movement of free electrons. Insulators, on the other hand, do not allow heat to flow easily due to their tightly bound electrons. Some materials, like liquids and gases, transfer heat through convection, where hot particles rise and cold particles sink. Overall, the flow of heat in materials depends on their conductivity and physical structure.