The formation of a light, carbonaceous residue on wood or other organic matter, resulting from incomplete combustion. The natural tendency of heat to flow upwards. Any liquid having a flash point at or above 38 degrees Celsius and below 93 degrees Celsius. Combustion may occur with any organic compound, or with certain combustible elements such as hydrogen, sulphur, and finely divided metals. The ability of a material to transfer energy from one place to another.
Thermal conductivity describes a substance s ability to transmit heat.
Electrical conductivity describes a substance s ability to transmit electrical current. Conductivity is the opposite of resistivity. Also used in electrical descriptions such as the electrical circuit was complete. The majority of heat transfer in a fire is by convection. Commonly referred to as DC current.