What is Air Pressure?
Subject: Geography | Topics:

General purpose of this lecture is to present on What is Air Pressure. Air pressure is the weight of the atmosphere pressing down on the earth. It is measured by a barometer in units called millibars. Most barometers use mercury in a glass column, like a thermometer, to measure the change in air pressure. here also briefly focus on what is the constant motion of air molecules in all directions.

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