NCERT Solutions

​Class 9 Physical Features of India

Class 9 Chapter 2:Physical Features of India

Very Short Answer Type Questions. [1 Mark]Why is there variation in the colour of the soil in different parts of India?
Ans. There is variation in the colour of soil due to the difference in rock formations.

Which theory presented by Earth scientists explains the formation of continents and oceans and the various landforms?
Ans. The Theory of Plate Tectonics

According to the ‘Theory of Plate Tectonics,’ the earth’s crust is formed of how many major plates?
Ans. Seven plates.

What is formed when tectonic plates come towards each other?
Ans. Convergent boundary.

What is formed when tectonic plates move away from each other?
Ans. Divergent boundary.

Geologically, which physiographic division of India is supposed to be one of the most stable land blocks.
Ans. The Peninsular Plateau

Which physiographic division of India was formed out of accumulations in the Tethys geosyncline?
Ans. The Himalayas

How many physical divisions are there in India?
Ans. There are six physical divisions in India.

List the six physical features of India.
Ans. (i) The Himalayan mountains (ii) The Northern Plains (iii) The Peninsular Plateau (iv) The Indian Desert (v) The Coastal Plains and (vi) The island groups.

What is the width of the Himalayas? Is it same everywhere?
Ans. The width of the Himalayas varies from 400 km in the west to 150 km in the east.

Based on altitudes, how many divisions are there of the Himalayas?
Ans. Based on altitudes, the Himalayas are divided into three parallel ranges. These are the
Greater, Middle and Lower Himalayas. Each of these has different names.

Which physical division of India was formed due to filling up of the depression formed after the Himalayas uplift and subsidence of the northern flank of the Peninsular Plateau?
Ans. The Northern Plains

The Himalayas consist of three parallel ranges in its longitudinal extent. Name the northernmost range.
Ans. The Himadri or the Inner Himalayas.

Which is the highest peak in India?
Ans. Kanchenjunga.

By which name are the lesser Himalayas known?
Ans. Himachal ranges.

In which division of the Himalayas are the famous valleys of Kashmir, Kangra and Kullu
Ans. The Lesser Himalayas or HimachalWhich of the following ranges of the Himalayas are composed of unconsolidated sediments
brought down by rivers?
Ans. The Shiwaliks

What is longitudinal valley lying between lesser Himalayas and Shiwaliks known as?
Ans. Duns.

From west to east, the divisions of the Himalayas are demarcated by river valleys. The part of the Himalayas lying between the Satluj and the Kali rivers is known as?
Ans. The Kumaon Himalayas

What do we call a narrow gap in a mountain range providing access to the other side?
Ans. Pass

The wet swampy belt of the Northern region is known locally as?
Ans. Terai

Into how many sections is the Himalaya divided on the basis of the region from west to east.
Ans. On the basis of regions, the Himalayas from west to east are divided into four sections.

Briefly describe the formation of the Northern Plains.
Ans. After the formation of the lofty Himalayas and depression in the south of it, the depositions from the three major river systems, namely the Indus, the Ganga and the Brahmaputra along with their tributaries formed the Northern Plains.

What do you understand by the term ‘Doab’?
Ans. Doab is made up of two words: ‘do’ meaning two and ‘ab’ meaning water. It refers to the land between two rivers, for example, the region between the Ganga and the Yamuna.

Into how many regions is the Northern Plains divided on the basis of variations in relief features?
Ans. The Northern Plains is divided into four regions on the basis of variations in relief features.
These are: (i) Bhabhar, (ii) Terai, (iii) Bhangar and (iv) Khadar

How was the Northern Plains formed?
Ans. It was formed by the deposition of sediments brought down by the Himalayan rivers. It is called alluvial plain.

What is the extent of the Northern Plains?
Ans. The Northern Plains extend from Punjab in the west to the Sunderbans delta in the east.

What are distributaries?
Ans. In the lower course, rivers branch off into many channels to form distributaries. Then the water of the main river gets distributed through these distributaries.

How is the Punjab plain formed?
Ans. The Punjab plain in the north is formed by the river Indus and its tributaries such as the Jhelum, Chenab, Ravi and the Satluj.