What is Atmospheric Pressure?

Atmospheric pressure, often referred to as air pressure, is the force exerted by the weight of air in the Earth’s atmosphere. It plays a crucial role in weather patterns, human health, and various scientific applications.

Causes of Atmospheric Pressure

The primary cause is gravity pulling air molecules toward the Earth’s surface, creating pressure. Factors like altitude, temperature, and humidity influence its variations.

Effects on Weather and Health

Changes in atmospheric pressure drive weather systems, leading to storms or clear skies. It also affects human well-being, potentially causing altitude sickness or joint pain.

Common Questions

How is atmospheric pressure measured?

It is typically measured using a barometer, with units like Pascals (Pa) or inches of mercury (inHg).

Why does pressure decrease with altitude?

As altitude increases, air density and molecular weight decrease, reducing pressure.

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