If you are looking for a simple answer...it is water vapour.
heated water is called vapour. the process is called evaporation.
It can be called "Water Vapor", "Steam", or "Clouds".
When water is in the form of a gas, it is called water vapour.
Water existing as gas is called water vapor.
The process of converting water into gas is called water-gas shift reaction.
Water that has evaporated (changed to a gas) is called water vapor.
The gas form of water is called steam or water vapor.
Water heated to a gas is eiher called water vapor or steam.
Steam. Not to be confused with vapor, which is a suspension of liquid water molecules in another gas.
Water in it's gas state is commonly called "steam".
The process of conversion of gas into water is called condensation.
When water is in the form of a gas, it is called water vapour.