Steam or mist is a type of water VAPOR that is created when water is heated to its boiling point. It is made up of tiny droplets of liquid water suspended in the air. Steam is usually created when water is boiled, while mist is created when water is cooled and condensed. Both steam and mist are forms of water VAPOR, but they differ in their physical properties. Steam is typically hotter and more visible than mist, while mist is cooler and less visible.