Paheli wonders why the winds shown in the figure are not in the exact north-south direction
Answers
Because the rotation of the earth on its axis causes a shift in wind direction, the winds created by uneven heating of the earth between the equator and the poles do not blow in an exact north-south direction.
The winds would have blown from north to south or south to north in a north–south pattern. The rotation of the globe, however, causes a shift in direction.
Winds generated by unequal heating of the earth between the equator and the poles do not blow in a precise north-south direction due to the planet's rotation on its axis causing a shift in wind direction.
The air we breathe exerts pressure on us. When air is heated, it expands, and when it is cooled, it shrinks. Warm air rises, whereas colder air sinks towards the earth's surface. As heated air rises, air pressure drops at that location, allowing cooler air to come in. Wind is the term for moving air.