Weather-Air Masses and Fronts

Which best describes an air mass?

• A large body of air that has no water vapor.

• A large body of air that has the same temperature but different amounts of water vapor.

• A large body of air that has the same amount of water vapor but different temperatures.

• A large body of air that has the same amount of water vapor and temperature.

Air masses mix when they meet.

• True

• False

When air masses meet, what is formed?

• A snow storm.

• A rain storm

• A front.

• A back.

How is a cold front created?

• A warm air mass bumps into cold a air mass and does not move.

• A warm air mass quickly moves over a cold air mass.

• A warm air mass quickly moves under a cold air mass.

• Cold fronts never form.

Humidity is the amount of water vapor in the air.

• True

• False

What type of weather will you see along a cold front?

• Thunderstorms

• Sunny skies

• Gentle rain

• No weather

How is a warm front different from a cold front?

• A warm front is created when warm air moves quickly over cold air.

• A warm front is created when warm air moves slowly over cold air.

• A warm front is created when warm air stops when it meets cold air.

• There is no such thing as a warm front.

On a weather map, what symbol represents a warm front?

• Blue triangles

• Blue half circles

• Red triangles

• Red half circles

On a weather map, a cold front is shown with red half circles and blue triangles.

• True

• False

An air mass is a large mass of air that is defined by its temperature and ____________________.

• Elevation (altitude)

• Water vapor content (humidity)

• Strength

• Weather