Air Masses, Pressure Systems, Fronts, & Storms

What causes weather?

• waves on the ocean

• the arctic ice caps

• changes in temperature, humidity, wind speed and air pressure

• meteorologists change the weather every day

When two air masses meet, there is a _____, or boundary.

• thunderstorm
• watch
• front
• cloud

What kind of pressure usually brings good weather?

• high

• low

• cold

• stationary

What is wind?

• the condition of the atmosphere at any given time or place

• the boundary between two air masses

• a large body of air that has a uniform temperature and humidity

• moving air

The boundary between two air masses is known as a

• front

• storm

• climate

• flood

A front is

• where warm air is cooling at earth's surface
• a line where hot and cold air are separating
• a line where two different air masses meet
• where cold air is rising and forming rain clouds

How many types of fronts are there?

• 1

• 2

• 3

• 4

A cold air mass that pushes out a warm air mass will make what kind of front?

• warm front

• cold front

• stationary front

• occluded front

A warm air mass pushing out a cold air mass will create what kind of front?

• warm front

• cold front

• stationary front

• occluded front

Changes in air pressure, air temperature, wind speed and humidity will cause changes in the

• meteorologists

• weather

• jet stream

• condensation