Do Gases Apply Pressure?

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Air pressure and atmospheric pressure

Air is a physical substance. It is a mixture of several gases present in the atmosphere and it has its own weight. Air exerts pressure on the earth's surface. The weight of air on a unit area of the earth is called Air Pressure
Atmospheric pressure is an important factor in producing changes in weather. Atmospheric pressure decreases with height.

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Natural effects of atmospheric pressure

Some natural effects of atmospheric pressure are:
1. As the temperature in a region is increased, it creates a region of low pressure. This causes air to flow from high pressure regions to low pressure regions. Hence, winds are caused due to a difference in atmospheric pressure.
2. Atmospheric pressure decreases with increase in height. This creates harsher environments in higher altitudes. The combined effect of low temperatures and pressure at high altitudes is reflected by a reduction in the density of forests.