What do we call the process by which liquid changes into gas?

The process by which a liquid changes into a gas is called evaporation. This occurs when molecules in a liquid gain enough energy, often due to heat, to break free from the liquid state and enter the gas phase.

Evaporation is a common process that you might observe when water is heated or left out in the open, as it slowly converts to water vapor. This plays a significant role in the water cycle by contributing to processes such as cloud formation. It's important to note that while other terms relate to changes in state or processes involving water, they do not accurately describe the transition from liquid to gas.