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:Air pressure at sea levels is higher than at the top…A source of sound produces waves in air of…A waterlogged habitat with low light penetration and…The concave shape of a birds wing during flight,…The initial volume and pressure of a given mass of…