Answer:
amber
Step-by-step explanation:
The term "electric" was coined from the word amber. This was when the Greeks found out that many materials become electric when they were rubbed with certain electric materials. In fact, there were two types of electric charge.
When amber was rubbed with fur, the material possessed what was known as resinous electricity. On the other hand, when the material was rubbed against silk, it acquired what was known as vitreous electricity.
Thus, it was thought that electricity was produced by friction of amber.