Study Guide-Weather

Chapter 3 Section 1 & 2

Know:

Cold, dry air affecting the northern United States in winter often comes from continental polar air masses.

When a rapidly moving cold air mass overtakes a slow-moving warm air mass, the result is a cold front.

When a warm air mass and a cold air mass meet and neither can move the other, the result is a stationary front.

Weather associated with an “HIGH” is generally dry and clear.

A funnel-shaped cloud that touches Earth’s surface is called a tornado.

Scientists who study weather and try to predict it are called meteorologists.

When a warm air mass overtakes a cold air mass, it forms a warm front.

Thunderstorms form within large cumulonimbus clouds.

Hurricanes typically form over warm ocean water.

The eye of a hurricane is calm.

In the continental United States, air masses are commonly moved by jet streams and the prevailing westerlies.

A “dome” of water that sweeps across the coast where a hurricane lands is called a storm surge.

A large amount of humid air that cools below 0°C can produce a winter snow storm.

Know weather map symbols:

a cold front a warm front; moving east

moving south

an occluded front

a stationary front; not moving

A maritime polar cool and humid air B continental polar air mass will bring cold dry air

C maritime polar

Location X is likely to get lake-effect

snow

A tornado is likely to occur at Y

F, maritime tropical

E continental tropical D maritime tropical

.

Know what to do in a thunderstorm

You and a friend are hiking in the wilderness when you become caught in a thunderstorm. What should you do?

You should not seek shelter under a tree, because lightning may strike the tree. To avoid being struck by lightning, you should find a low area away from trees and crouch with your head down.