What is Atmospheric Pressure?
Atmospheric pressure is the force exerted by the weight of air in the Earth’s atmosphere. Measured in units like Pascals or atmospheres (atm), it affects weather patterns, human health, and scientific applications.
Key Scientific Principles
At sea level, standard atmospheric pressure is 101,325 Pascals or 1 atm. It decreases with altitude due to less air above. Instruments like barometers are used to measure it accurately.
Weather and Climate Impact
Changes in atmospheric pressure drive weather systems. High pressure often brings clear skies, while low pressure indicates storms or precipitation.
Common Questions
How is atmospheric pressure measured?
It is typically measured using a barometer, with mercury or aneroid types being common.
Why does pressure change with altitude?
As altitude increases, there is less air above, reducing the weight and thus the pressure.
Explore Further
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