What process does evaporation refer to?

Evaporation specifically refers to the process where water changes from a liquid state to a gaseous state. This process occurs at the surface of the liquid as water molecules gain energy from heat, which allows some molecules to break free from the liquid's surface and enter the air as vapor. It is a key part of the water cycle, contributing to the natural movement of water from bodies of water into the atmosphere.

The other choices do not accurately describe evaporation. The transformation of water into ice refers to freezing, while filtration involves separating water from contaminants through a physical barrier. Blending water with other solvents pertains to mixing rather than the phase change that evaporation represents. Understanding these distinctions is crucial for anyone studying water operations and management.