physiography geomorphology of india section 1 MCQ Questions & Answers Detailed Explanation

Answer: (b)

Answer: (a)

During the hot weather period, i.e from March to May the Eastern and North-eastern states of the subcontinent like West Bengal, Bihar, Assam, Odisha (parts) and Bangladesh experience the dramatic appearance of a special type of violent thunderstorm known as Nor’wester.

In Bengal, it is known as ‘Kal Baisakhi’ or calamity of the month of Baisakh (April,15-May,15).

Apart from its destructive effects like a sudden rise in wind speed, lightning, thunder and hail the rainfall associated with the storm although small in amount, is extremely helpful for the pre-Kharif crops like jute, paddy, summer till and a large number of vegetables and fruits and the sudden drop in temperature gives relief after unbearable mid-day heat.

Answer: (b)

In physical geography, a dune is a hill of sand built either by wind or water flow. Dunes occur in different forms and sizes, formed by interaction with the flow of air or water. Most kinds of dunes are longer on the windward side where the sand is pushed up the dune and have a shorter "slip face" in the lee of the wind.

The origin of sand dunes is very complex, but there are three essential prerequisites:

1. An abundant supply of loose sand in a region generally devoid of vegetation (such as an ancient lake bed or river delta);
2. A wind energy source sufficient to move the sand grains; and
3. A topography whereby the sand particles lose their momentum and settle out.

Answer: (d)

Answer: (b)

Parasnath is a mountain peak in the Parasnath Range in the Giridih district of Jharkhand. Its height is 1365 metre.

Answer: (d)