Which statement describes a high-pressure system?

Which statement describes a high-pressure system?

• A. It generally brings storms and heavy rainfall.
• B. It causes rapid changes in the weather.
• C. It leads to turbulent wind conditions.
• D. It generally brings clear skies and calm air or gentle breezes.

Answer: (D)

When air in a high-pressure system descends and spreads out at the surface, it stabilizes the atmosphere and dries it out, which suppresses cloud formation. That leads to clear skies and light to gentle breezes, matching the description of calm conditions associated with high pressure. The other statements describe effects more typical of low-pressure systems or unsettled weather: storms and heavy rainfall, rapid weather changes, and turbulent winds generally arise from fronts and cyclones where the air is rising and conditions are unstable. So the statement about clear skies and calm air best captures what a high-pressure system brings.

When air in a high-pressure system descends and spreads out at the surface, it stabilizes the atmosphere and dries it out, which suppresses cloud formation. That leads to clear skies and light to gentle breezes, matching the description of calm conditions associated with high pressure. The other statements describe effects more typical of low-pressure systems or unsettled weather: storms and heavy rainfall, rapid weather changes, and turbulent winds generally arise from fronts and cyclones where the air is rising and conditions are unstable. So the statement about clear skies and calm air best captures what a high-pressure system brings.