Full Weather Test Review

Front

What is humidity?

Back

Humidity is the amount of water vapor present in the air. It is usually expressed as a percentage.

Front

What is relative humidity?

Back

Relative humidity is the ratio of the current amount of water vapor in the air to the maximum amount of water vapor the air can hold at that temperature, expressed as a percentage.

Front

What is a dew point?

Back

The dew point is the temperature at which air becomes saturated with moisture and water vapor begins to condense into liquid.

Front

How does temperature affect relative humidity?

Back

As temperature increases, the capacity of air to hold moisture increases, which can lower relative humidity if the amount of moisture remains constant.

Front

What is a cold front?

Back

A cold front is a boundary between a mass of cold air and a mass of warm air, where the cold air pushes under the warm air, often leading to precipitation.

Front

What instrument measures humidity?

Back

A hygrometer is an instrument used to measure the amount of humidity in the air.

Front

What happens to air pressure when humidity increases?

Back

When humidity increases, air pressure typically decreases because water vapor is less dense than the nitrogen and oxygen that make up most of the atmosphere.

Front

What is the relationship between humidity and temperature?

Back

Higher temperatures can hold more moisture, leading to lower relative humidity if the moisture content does not change.

Front

How can you calculate relative humidity?

Back

Relative humidity can be calculated using the formula: (actual vapor pressure / saturation vapor pressure) x 100%.

Front

What does it mean for air to be saturated?

Back

Air is saturated when it contains the maximum amount of water vapor it can hold at a given temperature, leading to a relative humidity of 100%.