Question

Choose the correct statement(s) with regard to air pressure.

• A. Air always moves from a high pressure area to a low pressure area.
• B. High pressure is associated with cloudy skies and wet weather.
• C. High temperature creates high pressure areas.
• D. As altitude increases, pressure decreases.

Answer 1

Answer: (A), (D)

The correct options are
A Air always moves from a high pressure area to a low pressure area.
D As altitude increases, pressure decreases.

Air always moves from high pressure areas to low pressure areas. Air pressure decreases as altitude increases as the volume of the air above that point is less. Horizontally, the distribution of air pressure is influenced by temperature of air at a given place. In areas where temperature is high the air gets heated and rises. This creates a low-pressure area. As air rises it creates clouds and hence low pressure is associated with cloudy skies and wet weather. In areas having lower temperature, the air is cold, making it heavy. Heavy air sinks and creates a high pressure area.