Moisture

[1] Small amounts of water may be found, for example, in the air (humidity), in foods, and in some commercial products.

Moisture also refers to the amount of water vapor present in the air.

Water content of some foods is also manipulated to reduce the number of calories.

The need to measure water content of products has given rise to a new area of science, aquametry.

There are many ways to measure moisture in products, such as different wave measurement (light and audio), electromagnetic fields, capacitive methods, and the more traditional weighing and drying technique.

Dew on a spider web
Water vapor deposits itself in colder surfaces.
Excess moisture in the inside of a home can cause paint in the walls to start peeling off, in this case, paint in the wall of a bathroom .