EVERYDAY SCIENCE

Detailed explanation-1: -Like all liquids, water boils when the vapor pressure is equal to the surrounding pressure. In nature, the atmospheric pressure is lower at higher elevations and water boils at a lower temperature-for example at 7000 ft above sea level, water boils at 92 °C (198 °F) instead of 100 °C (212 °F).

Detailed explanation-2: -The water cycle shows the continuous movement of water within the Earth and atmosphere. It is a complex system that includes many different processes. Liquid water evaporates into water vapor, condenses to form clouds, and precipitates back to earth in the form of rain and snow.

Detailed explanation-3: -The higher the temperature, the more water vapor a volume of air is capable of holding. Therefore, any change in temperature alters the volume’s water vapor capacity. As air warms, its capacity for holding water vapor increases; as it cools, the capacity decreases.

Detailed explanation-4: -A linear relationship that expresses the nonlinear relationship between the vapor pressure of a liquid and temperature: ln P=−Hvap/RT+C, where P is pressure, Hvap is the heat of vaporization, R is the universal gas constant, T is the absolute temperature, and C is a constant.