Wood:

* Poor conductor of heat: Wood is a relatively good insulator, meaning it does not conduct heat well. The cellular structure of wood contains air pockets that act as barriers to heat transfer.

Polystyrene:

* Good conductor of heat: Polystyrene, also known as Styrofoam, is a synthetic polymer that is a much better conductor of heat than wood. Its structure contains many small air pockets, which can trap heat and make it a good insulator.

Conclusion:

While both wood and polystyrene are used as insulation materials, polystyrene is a significantly better conductor of heat than wood. This is why polystyrene is commonly used in applications where thermal insulation is crucial, such as in refrigerators, coolers, and building insulation.