Humidity Lesson

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Humidity

What is Humidity ?

Humidity refers to the presence of water vapor in the atmosphere, the amount of moisture in the air. Humidity is a measure of the amount of moisture in the air. It tells you how comfortable it is to be outside, and if there is enough moisture to create clouds and rain.

Why is it important ?

Humidity has a large impact on human and animal health and the health of crops. It affects the ability of both plants and animals to cool themselves through evaporation. It is also important to precipitation formation.

What is Relative Humidity ?

Relative humidity is given as a percentage. This percentage tells you how close the air is to being saturated.

What is Water Vapor ?

Water vapor is water in its gaseous state-instead of liquid or solid (ice). Water vapor is totally invisible.

What is evaporation ?

Evaporation is the process by which water changes from a liquid to a gas or vapor. Water boils at 212 degrees F (100 degrees C), but it actually begins to evaporate at 32 degrees F (0 degrees C); it just occurs extremely slowly. As the temperature increases, the rate of evaporation also increases.