Question

The vertical movement of air is called ____________.
A. Cyclone
B. Air Current
C. Wind
D. Land Breeze

Answer 1

Hint: These are concentrated areas of wind. The strength of this type of air is caused by the hills.

Complete answer: Option A- Cyclones are large systems of horizontal winds that circulate in the centre of a low atmospheric pressure. These winds circulate in an anti-clockwise direction at the north of the equator and in a clockwise direction at the south of the equator. These winds are often associated with thunderstorms and rain or even snow.
Option B- An upward and downward movement of air is known as air currents. They are caused by the differences in temperature, pressure or impurity concentration of the air. Rising air, that is when the air is moving upwards, causes turbulence as it creates a low pressure on the surface of the earth.
Option C- Wind is a horizontal movement of air. These are caused by the difference in air pressure within the atmosphere. The air which is present under a high pressure area tends to move a low pressure area thus causing a horizontal movement in air.
Option D- Land breeze may be defined as a local wind system that blows from the land to the sea, thus making a horizontal movement of air. These wind systems are created by the heating or cooling of the water surface and its adjacent land areas.

Therefore, it can be said that the correct answer is option B, Air currents.

Note: These air currents primarily originate as a result of the global atmospheric air circulation which is the result of temperature difference on the Earth. This circulation of air currents result in the creation of air pressure changes.