Question

what is a poor conductor of heat

Answer 1

Good and bad conductors of Heat. Thermal conductivity of a substance is the ability of that substance to conduct heat. A measure of the “goodness” or the ”badness” of a substance for the flow of heat through conduction is provided by its thermal conductivity. Good Conductors.

Answer 2

Insulators are poor conductors of heat. They don't allow heat to pass through them that is the thermal conductivity is very less. Plastics are poor conductors of heat.