Question

Atmospheric pressure falls with increase in altitude ?

Answer 1

Explanation:

The pressure in the atmosphere at any point can be defined at any altitude as the total weight of the air above a unit area. There are fewer molecules of air above a given surface at higher elevations than a similar surface at lower levels.

Thus, it means that the air pressure decreases as the height increases. Since most of the molecules of the atmosphere are held near the surface of the earth by force of gravity, at first air pressure decreases rapidly, then at higher levels more slowly. The pressure decreases as the altitude increases. The pressure in the atmosphere at any point can be described at any height as the total weight of the air above a unit area.

Answer 2

Atmospheric pressure falls with the increase in altitude is a true statement.

Explanation:

• The air that is laden with moisture tends to be heavier and tries to replace the lighter air near the surface of the Earth.

• As a result, the lighter air naturally moves above the heavier air.

• As we move vertically away from the surface of the Earth, the air goes on becoming thinner owing to its lightness.

• This air contains negligible or no moisture at all and thus exerts no pressure.

• Thus, with increasing altitude, the atmospheric pressure decreases.