Relative Humidity and Dew Point

Front

What happens when the relative humidity is 100% and the temperature begins to fall?

Back

Dew will form.

Front

If the air is only holding one-third as much moisture as it can possibly hold, what is the relative humidity?

Back

33%.

Front

What is the phase change from water vapor to liquid water called?

Back

Condensation.

Front

As the air temperature increases, what happens to the air's capacity for water vapor?

Back

It increases.

Front

What do we call a collection of millions of tiny water droplets or ice crystals?

Back

Clouds.

Front

Define relative humidity.

Back

The amount of moisture in the air compared to the maximum amount of moisture the air can hold at a given temperature.

Front

What is the dew point?

Back

The temperature at which air becomes saturated with moisture and dew begins to form.

Front

How does temperature affect relative humidity?

Back

As temperature increases, relative humidity decreases if moisture content remains constant.

Front

What is the relationship between dew point and comfort level?

Back

A higher dew point indicates more moisture in the air, which can make it feel more uncomfortable.

Front

What is evaporation?

Back

The process by which liquid water turns into water vapor.