Water in the form of a gas is called steam or water vapor. When water is heated to its boiling point, it transitions from a liquid to a gaseous state. This process is known as evaporation when it occurs at any temperature, but when at boiling point, it becomes steam.
In this gaseous state, water molecules are much more spread out compared to when they are in liquid form. This means that steam can carry heat energy, which is why it’s often used in cooking and heating processes. It’s also important to note that water vapor is an invisible gas, while steam can be seen as a cloud or mist because it contains tiny droplets of liquid water suspended in the air.