Atmospheric pressure is the force exerted by the weight of air in the Earth's atmosphere on a given surface area. It is an important concept in physics, especially for GCSE students, as it helps explain various weather phenomena and the behaviour of gases.
Measured using a barometer in units called Pascals (Pa) or sometimes in millibars (mb), atmospheric pressure decreases with higher altitudes because there is less air above to exert pressure.
Understanding atmospheric pressure is crucial for topics such as flight, breathing, and meteorology, as it helps to explain how differences in pressure can result in wind and changes in weather patterns.
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