sentences: wood is a ergonal / ergonal matter insulator & a plate sometimes is made of wood ->  a metal spoon is a thermal conductor  coffee is a mean of copper & a hot runways is a sink of light ->  hot tea is a source of heat  hot tea is a source of heat & a wood plate is placed in a plate of hot coffee ->  the hot tea is a source of heat for the metal spoon  a metal spoon is a thermal conductor & the hot tea is a source of heat for the metal spoon & if a ergonal insulator is exposed to a sink of heat, then ergonal respiration will wreck the ergonal insulator become hot -> the metal spoon will be heated up by thermal conduction