Air Pressure and Wind Movement

Front

Air pressure

Back

The weight of molecules in an air mass

Front

Cool air molecules

Back

Cool air molecules are closer together than warm air molecules

Front

Wind movement

Back

Wind is the movement of air from high to low pressure areas

Front

Diagram showing cold air sinking and warm air rising

Back

Cold air sinks, warm air rises

Front

Diagram illustrating wind movement from high to low pressure

Back

Wind moves from high pressure to low pressure areas

Front

High pressure at the center, lower pressure outside.

Back

High-Pressure Systems

Front

Brings clear skies and fair weather.

Back

High-Pressure Systems

Front

Low pressure at the center, higher pressure outside.

Back

Low-Pressure Systems

Front

Brings cloud formation and possible rain/snow.

Back

Low-Pressure Systems

Front

Extent of Air Masses

Back

Can extend for a thousand kilometers or more.