Question

Give reasons:

Pressure belts oscillate.

Answer 1

1. The duration and the intensity of sun rays vary during particular periods of 'the year in both the hemispheres.
2. As a result, the locations of the temperature zones and the pressure belts dependent on the sun's heat also vary.
3. This change is of the order of 5° to 7° towards the north in Uttarayan, and 5° to 7° towards the south in Dakshinayan. In this way, pressure belts oscillate.