Dry and Wet

The words “dry” and “wet” describe how much liquid is present on or inside something. An object is usually called dry when it has little or no liquid on its surface. A towel that has just come out of the dryer is dry, for example, while a glass that has been rinsed may be wet because a thin layer of water remains on it.

The difference is not always absolute: an object can be slightly damp, which means it contains or carries a small amount of moisture. What counts as wet can also depend on the material and the situation. Water can make many surfaces wet because its molecules spread across and interact with the material.

Some substances absorb water, as a sponge or cloth does, while others mainly keep it on their surface. Drying happens when liquid is removed, often through evaporation, absorption, draining, or a combination of these processes.

Heat and moving air can speed up evaporation, which is why wet clothes often dry faster in a warm, well-ventilated place. Learning the difference between dry and wet helps children describe everyday objects and notice how materials change when they come into contact with water or another liquid.