air pressure. 3. Heavy rain accompanied with thunderstorm causes 4. Light travels at a speed of while sound travels at a speed of 5. Cyclone is a small pressure system in which wind blows in different directions. The centre of a cyclone is called its 6.
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That pressure is called atmospheric pressure, or air pressure. It is the force exerted on a surface by the air above it as gravity pulls it to Earth. Atmospheric pressure is commonly measured with a barometer. ... One atmosphere is 1,013 millibars, or 760 millimeters (29.92 inches) of mercury.
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