ERN Item Type:
- Classroom Activities
Much of the water cycle is visible, both in the form of liquid water (oceans, rivers, lakes, and precipitation such as rain) and in the form of solid water (ice, snow, and precipitation such as falling snow or hail). However, some of the water in the water cycle is invisible because water is also found as a gas in the air. This invisible amount of water accounts for about 0.001% of all water on earth, but it is very important. One key to the formation of dew and other types of condensation, such as rain, sleet, and snow, is that air of different temperatures can hold different amounts of water. Warmer air can hold more water and colder air can hold less water. In this activity, you will calculate the actual amount of water in the air in your classroom.