In the world of Avatar, airbenders have the ability to manipulate and control the element of air. However, airbending as depicted in the Avatar series primarily focuses on the manipulation of air in its gaseous form, rather than the manipulation of gases in their liquid forms. Airbenders are shown to have a deep connection with the air and can manipulate its flow, create gusts of wind, and even generate powerful tornadoes.
Regarding the bending of liquids in their gaseous forms or gases in their liquid forms, there is no specific indication or demonstration of airbenders having such abilities in the Avatar series. Each bending discipline in the Avatar world is associated with a specific element and has its own set of limitations and techniques.
As for the elements that the benders can manipulate in the Avatar universe, there are four main bending disciplines, each associated with a different element:
Waterbending: Waterbenders can manipulate and control water in its various forms, including solid ice, liquid water, and even water vapor (mist or steam).
Earthbending: Earthbenders have the power to control and shape earth and rock. This includes manipulating solid earth, such as soil and stones.
Firebending: Firebenders can generate and control fire, creating flames, directing their movements, and even generating lightning.
Airbending: Airbenders can manipulate and control air, creating gusts of wind, flying using gliders, and creating powerful air currents.
These bending disciplines are based on the classical elements but are given a unique interpretation within the world of Avatar.