Here's why:
* Conductors: Materials that allow electricity to flow easily through them. Metals have free electrons that can move freely, allowing electrical current to pass through them.
* Insulators: Materials that resist the flow of electricity. They have tightly bound electrons that cannot move freely.
Important Note: While a kitchen fork is a conductor, you should never use it to test electrical circuits or wires. Doing so is extremely dangerous and could lead to electric shock.