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Q)

What is the main cause of wind’s?

$\begin{array}{1 1} \text{a)moon’s gravity} \\ \text{ b)uneven heating of earth’s surface} \\ \text{ c)clouds} \\ \text{ d)trees} \end{array}$

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A)
Air at the equator is warmed by the direct rays of the sun while air at the poles is cooled because the sun’s rays are not so direct.
As air warms, it expands and becomes less dense therefore rises, similarly but vice versa for cool air.So basically uneven heating of earth’s surface.
This causes a pressure difference between the poles and equator causing cool winds to blow away from the poles close to the ground and warm air to move away from the equator at high altitudes, therefore a circular motion is created.
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