Average air pressure at sea level is

Tornadoes and hurricanes are large areas of _____ pressure.

_______ measures temperature

______ measures wind direction and shows direction on weather maps.

_____ measures wind speed

_____ measures air pressure

_______ carries instruments into atmosphere.

What type of front is pictured?

What type of front is pictured?

What type of front is pictured?

What type of front is pictured?

Air masses are large bodies of air that has relatively uniform _________ and humidity

Air masses that originate over land are called ________________.

A cold air mass that originates over water would be called _________ ______________

Cold air masses tend to approach from the ______,_____,____.

High-Pressure areas move toward areas of _________ pressure.

The boundary between two air masses is called a ____________.

A ________ front occurs when cold air pushes warm up over the cold air creating thunderstorms along the leading edge of the front.

_______ pressure is associated with a warm front.

_____ fronts are slower than _____ fronts

When two air masses collide but neither is strong enough to push the other out of the way, a ________ front forms.

An _______ front forms when two cold air masses converge on a warm air mass.

When a front approaches from the East or Northeast it is called a ______ ____ ____ front