The mass of air whose isobars form a circular shape; with low pressure in the centre and increasing towards the outside, is known as? by Sunday | Dec 30 | Geography JAMB | 0 comments A. hurricane B. typhoon C. harmattan D. cyclone Correct Answer: Option D – cyclone Users Also Read These:The mass of water vapour in a given volume of air is…The concave shape of a birds wing during flight,…A body moves along a circular path with uniform…A source of sound produces waves in air of…Air pressure at sea levels is higher than at the top…