Unit 1, L5/L6: Water and the Weather

Front

What is a weather front?

Back

A boundary where two air masses meet.

Front

What is a cold front?

Back

A weather front in which a cold air mass advances to replace a warm air mass.

Front

What is an air mass?

Back

A huge volume of air that has a uniform temperature and humidity at a given altitude.

Front

What is a warm front?

Back

A weather front in which a warm air mass advances to replace a cold air mass.

Front

What is dew?

Back

Water droplets that form on surfaces due to condensation of water vapor.

Front

What is an occluded front?

Back

A weather front that occurs when a cold front overtakes a warm front.

Front

What is relative humidity?

Back

The amount of water vapor present in the air compared to the maximum amount the air can hold at that temperature.

Front

What is a low pressure system?

Back

An area where the atmospheric pressure is lower than that of the surrounding areas, often associated with stormy weather.

Front

What is an isobar?

Back

A line on a weather map that connects points of equal atmospheric pressure.

Front

What happens during condensation?

Back

Water vapor cools and changes into liquid water, forming droplets.