QUIZ – 2020: INSIGHTS STATIC , 19 July 2021 – Geography – INSIGHTSIAS

Solution: d)

Cyclones are given many names in different regions of the world – They are known as typhoons in the China Sea and Pacific Ocean; hurricanes in the West Indian islands in the Caribbean Sea and Atlantic Ocean; tornados in the Guinea lands of West Africa and southern USA.; willy-willies in north-western Australia and tropical cyclones in the Indian Ocean.

Solution: d)

Equatorial regions receive rainfall throughout the year and thus there is no dry season. Average annual rainfall exceeds 200cm to 250cm. Even the driest month of the year receives rainfall more than 6cm.

Most of the annual rainfall in the equatorial region is received in the form of convectional rainfall.

The strong daily vertical convective mechanism due to intense heating of ground surface because of high amount of insola­tion, horizontal convergence of trade winds forming intertropical convergence, a fairly large number of atmospheric disturbances (cyclonic storms) and thun­derstorms yield heavy rainfall daily throughout the equatorial regions.

Solution: b)

• The tropical zone being nearer to the equator, experiences high temperatures throughout the year with small daily and annual range of temperature.
• Area north of the Tropic of Cancer being away from the equator, experiences extreme climate with high daily and annual range of temperature.

Solution: c)

MASS MOVEMENTS:

• These movements transfer the mass of rock debris down the slopes under the direct influence of gravity. That means, air, water or ice do not carry debris with

them from place to place but on the other hand the debris may carry with it air, water or ice. The movements of mass may range from slow to rapid, affecting shallow to deep columns of materials and include creep, flow, slide and fall. Gravity exerts its force on all matter, both bedrock and the products of weathering.

• So, weathering is not a pre-requisite for mass movement though it aids mass movements. Mass movements are very active over weathered slopes rather than over unweathered materials.
• Mass movements are aided by gravity and no geomorphic agent like running water, glaciers, wind, waves and currents participate in the process of mass movements.

Solution: d)