Chp 13 Lesson 2: Weather Patterns

A low-pressure system is characterized by:

• High atmospheric pressure

• Low atmospheric pressure

• Stable weather conditions

• Clear skies

In a low-pressure system, air moves from _______ pressure to _______ pressure.

• high, low

• low, high

• medium, low

• low, medium

What happens to air in the center of a low-pressure system?

• The air rises.

• The air sinks.

• The air remains stable.

• The air moves horizontally.

A high-pressure system is a large body of circulating air that has high pressure at its center and _______ pressure on the outside.

• lower

• higher

• equal

• same

What do high-pressure systems bring?

• Clear skies and calm weather

• Stormy and rainy weather

• Snow and cold temperatures

• Windy and cloudy conditions

Air masses are large bodies of air that have distinct _______ and _______ characteristics.

• temperature, moisture

• color, shape

• size, weight

• speed, direction

What type of air masses are cold and dry?

• Tropical maritime

• Polar continental

• Tropical continental

• Polar maritime

A weather front is the boundary between two _______.

• air masses

• oceans

• continents

• rivers

What forms when a colder air mass moves toward a warmer air mass?

• A warm front

• A cold front

• A stationary front

• An occluded front

The mature stage of a thunderstorm is characterized by:

• strong updrafts and downdrafts

• only updrafts

• only downdrafts

• no air movement