if a thermal conductor is exposed to a source of heat then that conductor may become hot / warm
thermals is rising_currents_of_warm_air. warmth is not hotness. heat is what_makes_hot. radiators_and_fires is not both_sources_of_heat. warmth is hotness. heat is not what_makes_hot. heat_sink is conductor. radiators_and_fires is both_sources_of_heat. thermals is not rising_currents_of_warm_air. copper is not good_conductor_of_heat.