Test 1. Varinat 2

Here is a list of conductors: gold, silver, copper, aluminum, brass, bronze, iron, steel, mercury, graphite, water and insulators: teflon, glass, porcelain, polyvinylchloride (PVC), fiberglass, rubber, ceramic, oil, quartz, plastic, air, diamond, dry wood.
3) Semiconductors are materials having a moderate resistance.
Examples of semiconductors are germanium and silicon.