This is me and my groups first go at explaining sound
Like many terms in science, Sound is formed from a vibration and from mechanical waves. in everyday use, sound refers to what the ear can hear. Sound can be pleasant unpleasant hard or soft high or low. The scientific meaning of sound is based on an understanding interaction between matter and energy, what the brain hears of sound or interprets gets its start from the energy of moving molecules of air.
when a guitar string vibrates energy comes from vibrations. these oscillating sound waves can move through substances like water dirt or solid rock.
Energy comes from vibration like a guitar strings.