Air Mass and Fronts Final Review

What is an air mass?

• A large mass of air
• A large body of air that has similar temperature, humidity and pressure
• A large mass of air that covers the United States
• A large body of air that is similar in temperature

Colder air is

• less dense and rises, thus having less pressure
• more dense and rises, thus having more pressure
• less dense and sinks, thus having less pressure
• more dense and sinks, thus having more air pressure

There are how many air masses that affect weather in the United States?

• 1
• 2
• 3
• 4

Characteristics of the Maritime Tropical air mass is

• warm, moist
• warm, dry
• cold, dry
• cold moist

Characteristics of the Continental Polar air mass is

• moist, cool
• warm, moist
• dry, cool
• warm, dry

Maritime air masses form over

• land
• ocean
• ponds
• mountains

Continental air masses form over

• land
• ocean
• ponds
• volcanoes

What air mass forms over Canada?

• Continental Tropical
• Maritime Polar
• Continental Polar
• Maritime Tropical

What area would you find a Maritime Tropical air mass?

• Canada
• Arizona
• Chicago
• Gulf of Mexico

When two air masses of different temperatures meet, they cause a 

• Thunderstorm
• Precipitation
• Front
• High pressure system