Definitions [3]
Define High pressure
High pressure is an area of the atmosphere where the barometric pressure is higher than its surrounding areas. In this case, the wind from the center of high pressure blows towards the surrounding low-pressure areas.
Define Low pressure.
A low-pressure area is an area in the atmosphere where the pressure is lower than its surrounding areas. In this situation, the wind from the surroundings blows towards the center of low pressure.
Define one atmosphere.
The pressure exerted by this mercury column is considered as the pressure of magnitude ‘one atmosphere’ (1 atm).
