Air Masses & Fronts

What is an air mass?

• A large body of air with consistent temperature and humidity.

• A small pocket of air that causes localized weather changes.

• The boundary where two different air masses meet.

• A global wind pattern that moves air around the planet.

How does temperature affect air pressure?

• Warm air rises and spreads out, resulting in higher air pressure.

• Cold air sinks and becomes less dense, resulting in lower air pressure.

• Warm air rises and spreads out, resulting in lower air pressure.

• Cold air rises and becomes more dense, resulting in higher air pressure.

Which type of air mass is characterized by very warm air and forms around the equator?

• Arctic air mass

• Polar air mass

• Tropical air mass

• Equatorial air mass

What type of weather is typically associated with a cold front passing?

• Long periods of light rain, followed by warmer, more humid weather.

• Short, intense storms and thunderstorms, followed by cooler, less humid weather.

• Light rain that lasts a while, with no significant temperature change.

• Clear skies and stable weather.

Which type of pressure system is typically associated with clear, stable weather?

• Low-pressure system

• High-pressure system

• Stationary front

• Occluded front