What Are the Two Characteristics Are Used to Classify Air Masses? ______

Name ______Block ______Date ______

Activator

What are the two characteristics are used to classify air masses? ______

Classify the four major types of air masses according to whether they are dry or humid. ______

Thunderstorms

A storm is a ______in the atmosphere.

A ______is a small storm accompanied by ______

Thunderstorms form large ______, also known as ______

Lightning

During a thunderstorm, areas of ______build up in the storm clouds.

Lighting is a sudden ______or ______discharge, between parts of a ______, between nearby clouds, or between a cloud and the ground.

Lightning and Thunder

A lightning bolt ______near it and the rapidly heated air ______suddenly and explosively.

Thunder is the sound of the ______

Since light travels faster than ______, you see ______before you hear thunder.

Thunderstorms

During thunderstorms, ______places where lightning may strike.

Also avoid objects that can ______, such as metal objects and bodies of water.

Tornado

A tornado is a ______whirling, ______that reaches down from a storm cloud to touch ______surface.

Tornadoes most commonly develop in thick ______.

Tornadoes

Tornadoes occur most often in the ______, but they can occur in nearly every part of the United States.

The safest place during a tornado is in the ______

Hurricane

A hurricane is a ______that has winds of ______kilometers per hour of higher.

A hurricane begins over ______as a ______-pressure area, or tropical disturbance.

Hurricane

If the tropical disturbance grows in ______, it becomes a ______storm, which may then become a hurricane.

The center of a hurricane is a ______surrounding a quiet eye.

Storm Surge

The ______pressure and ______winds of the hurricane over the ocean raise the level of the water up to ______meters above normal seal level.

The result is a storm surge, a ______that sweeps across the coast where the hurricane lands.

Hurricane Watch

A hurricane watch is an ______that hurricane conditions are possible in your area within the next ______

Be prepared to ______or move away temporarily.

Hurricane Warning

A hurricane warning means that hurricane conditions are ______

If you hear a hurricane warning and are told to evacuate, ______the area ______