air pressure
the weight of the air pressing on everything in the environment
Air pressure refers to the force exerted by the weight of air molecules in the atmosphere on objects below. It is often measured in units of pounds per square inch (psi), Pascal (Pa), or millibars (mb).
Air pressure is created as a result of the gravitational force acting on the air molecules in the atmosphere. The weight of the air above a certain point on the Earth’s surface creates a pressure that is felt at that point. This pressure decreases as altitude increases because there are fewer air molecules above a given point at higher altitudes.
At sea level, the average air pressure is about 1013 mb. However, this can vary with changes in weather patterns and temperature. A decrease in air pressure often indicates the approach of a low-pressure weather system, while an increase in air pressure usually indicates a high-pressure system.
Air pressure plays an important role in many aspects of weather, including the formation of clouds, precipitation, and wind patterns. It is also important in everyday life, as it affects the performance of tires, pressure cookers, and other tools and gadgets that rely on a certain level of pressure to function properly.
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