Here's why:

* Wood is a good insulator: This means it resists the flow of heat. It's made up of organic materials with a complex structure that traps air, which is a very poor conductor of heat.

* Metals are good conductors: Metals like copper, silver, and aluminum are excellent heat conductors because their atoms are arranged in a way that allows heat energy to easily flow through them.

Let me know if you'd like to know more about heat conduction!