If the squiggly line you are looking at is above the note, then we call that a mordent. It is a small squiggly line that is horizontal and placed directly over the note. A mordent is a musical symbol that tells the player to use two notes and play them rapidly together.
Greeks philosophers were the first to record their ideas about the physical properties of the world around them. The first theories of matter were put forward by Empedocles in 450 BC, he proposed that all matter was composed of four elements - Earth, air, fire and water.
