Sound is a form of longitudinal waves.
Sound is formed by things vibrating.
The Speed of Sound[edit | edit source]
The speed of sound is dependent on the material that the sound is going through. It moves faster in a solid than a liquid or a gas because the molecules are closer together, and therefore can pass on the energy quicker.
Below are a list of values for the speed of sound in various materials:
Air(at 0°C): 330 m/s
Water: 1400 m/s
Concrete: 5000 m/s
Steel: 6000 m/s