The Physical Features of India- Solutions NCERT Class 9 Geography

The Physical Features of India NCERT Class 9 Geography: The Second chapter of class 9 NCERT geography explains the plate tectonic movements and the resulting land forms like the formation of the Himalayas and the northern plains. Afterwards the 6 physical features are given. Here are given solutions to the chapter – Physical features of Inda class 9 geography.


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1 Solutions: Physical Features of India Class 9 Geography

Solutions: Physical Features of India Class 9 Geography


Page 11

Q.1. Find out the names of the glaciers and passes that lie in the Great Himalayas.

Answer
The names of the glaciers that lie in Great Himalayas are
(a) Siachen Glacier – Jammu and Kashmir
(b) Godwin Glacier – Jammu and Kashmir
(c) Gangotri Glacier – Uttarakhand
(d) Yamunotri Glacier – Uttarakhand

Passes in the Great Himalayas — Karakoram pass, Shipkila pass, Nathula, Bomdila pass.

Q.2. Find out the name of the states where highest peaks are located.

Answer States where highest peaks are located are
(a) Jammu and Kashmir (Nanga Parbat)
(b) Sikkim (Kanchenjunga)
(c) Uttarakhand (Nanda Devi, Kamet)

Q.3. Find out the location of Mussoorie, Nainital, Ranikhet from your atlas and also name the state where they are located.

Answer All the three towns are in the state of Uttarakhand in the range called lesser Himalaya or Himachal.


Page 15, 16 Exercises

Q.1. Choose the right answer from the four alternatives given below.

(i) A landmass bounded by sea on three sides in referred to as
(a) coast
(b) island
(c) peninsula
(d) None of these

Answer (c)

(ii) Mountain ranges in the eastern part of India forming its boundary with Myanmar are collectively called as
(a) Himachal
(b) Uttarakhand
(c) Purvanchal
(d) None of these

Answer (c)

(iii) The Western coastal strip, South of Goa is referred to as
(a) Coromandal
(b) Konkan
(c) Kannad
(d) Northern Circar

Answer (c)

(iv) The highest peak in the Eastern Ghats is
(a) Anai Mudi
(b) Kanchenjunga
(c) Mahendragiri
(d) Khasi

Answer (c)

Q.2. Answer the following questions briefly

(i) What are tectonic plates?

Answer

The convectional currents below the Earth’s crust split the crust into a number of pieces. These pieces are called tectonic plates. e.g., Eurasia plate, Indo Australian plate etc.

(ii) Which continents of today were part of the Gondwana land?

Answer: The Gondwana land included India, Australia, South Alho and South America as one single land mass.

(iii) What is the Bhabar?

Answer

Bhabar is a narrow belt of land about 8 to 16 km wide and covered with pebbles deposited by the rivers and lying parallel to the slopes of the Shiwaliks.

(iv) Name the three major divisions of the Himalayas from north to south.

Answer

The 3 major divisions of the Himalayas from North to South are as follows

(a) The Great or Inner Himalayas or the Himadri It is a continuous range consisting of the highest peaks.
(b) Himachal or Lesser Himalayas range lying to the South of the Himadri is known as Himachal or Lesser Himalayas.
(c) Shiwaliks The outermost range of the Himalayas is known as the Shiwaliks. These are the foothill ranges and represent the southernmost division of the Himalayas.

(v) Which plateaus lies between the Aravali and the Vindhyan ranges?

Answer

Malwa plateau lies between the Aravali and the Vindhyan ranges.

(vi) Name of the Island group of India having coral Vindhyan

Answer: Lakshadweep Islands are composed of small coral islands.

Q.3. Distinguish between
(i) Converging and diverging tectonic plates.

Answer: Difference between Converging plates and Diverging plates.

Converging Tectonic PlatesDiverging Tectonic Plates
When tectonic plates move towards each other, they are called converging plates.When tectonic plates move away from each other, they are called diverging plates.
They collide or crumble or one of them slides under the other while moving towards each other.They do not collide or crumble while moving away from each other.
Converging plates cause folds.Diverging plates cause fractures in the crust.

(ii) Bhangar and Khadar.

Answer: Differences between Bhangar and Khadar.

Bhangar

Khadar

(a) Bhangar is cold alluvial soil.

(a) Khadar is new alluvial soil.

(b) Bhangar soil is found away from the river.

(b) Khadar is found near the river basin.

(c) Bhangar is less fertile.

(c) Khadar is very fertile.

(d) It contains calcareous deposits (d) This soil is fine grained. locally known as Kankar.

(d) The soil is fine grained.

(e) The soil is dark in colour.

(e) The soil is light in colour.

(iii) Western Ghats and Eastern Ghats.

Answer: Difference between the Eastern Ghats and the Western Ghats.

The Eastern Ghats

The Western Ghats

(a) The Eastern ghats mark the eastern edge of the Deccan plateau.

(a) The Western ghat mark the western edge of the Deccan plateau.

(b) They are discontinuous and irregular and dissected by rivers draining into the Bay of Bengal.

(b) They are continuous and can be crossed through passes only.

(c) They lie parallel to the eastern coast along the Arabian Sea.

(c) The Western Ghats lie parallel to the west coast along the Arabian Sea.

(d) The highest mountain is Mahendragiri with a height of 1,501 metres.

(d) The highest peak is Anai Mudi with
a height of 2,695 metres.

(e) Their average height is 600 metres.

(e) Their average height is1,600 metres.

Q.4. Describe how the Himalayas were formed.

Answer

(a) The oldest landmass of India (peninsular part) was a part of Gondwana land.

(b) Gondwana land included India, Australia, South Africa and South America as one single landmass.

(c) Convectional currents split the crust into a number of pieces, thereby leading to the drifting of the Indo Australian plate after being separated from the Gondwana land towards the North.

(d) The Northward drift resulted in the collision of the plate with the much larger Eurasian plate.

(e) Due to this collision the sedimentary rocks which were accumulated in the geosyncline known as the Tethys, were folded to form the mountain systems of Western Asia and Himalaya.

(f) The Himalayas represent a youthful topography with high peaks, deep valleys and fast following rivers.

Q.5. Which are the major physiographic divisions of India? Contrast the relief of the Himalayan region with that of the Peninsular plateau?

Answer
(i) The Himalayan mountains
(ii) The Peninsular plateau
(iii) The Coastal plains
(iv) The Northern plains
(v) The Indian desert
(vi) The islands

Physical Features of India: Contrast between the Himalayan region and the Peninsular plateau

The Himalayan Region

The Peninsular Plateau

(a) Formed by folding process due to collision of the Indo Australia plate with the Eurasian plate.

(a) Formed due to the breaking and drifting of Gondwana land.

(b) Himalayas made up of sedimentary rocks.

(b) Plateau contains igneous and metamorphic rocks.

(c) Himalayan mountains form an unstable zone.

(c) Considered to be one of the most stable land blocks.

d) Himalayas are the most recent landforms.

(d) The Deccan plateau is one of the most
ancient landmasses.

(e) The average height of Himalayas is 6,000 metres.

(e) The average height of the plateau is 900
metres.

(f) The Himalayas lack minerals.

(f) The plateau is a storehouse of minerals.

(g) Perennial rivers originate in the
Himalayas.

(g) Peninsular rivers are seasonal.

Q.6.  Give an account of the Northern plains of India.

Answer

(a) The Himalayan uplift out of the Tethys sea and subsidence of the Northern flank of the peninsular plateau resulted in the formation of a large basin. In course of time, this depression gradually got filled with deposition of sediments from rivers flowing from the mountains in the north and led to formation of the fertile Northern plains.

(b) It spreads over an area of 7 lakh sq. km. The plain is about 2400 km long and 240-230 km broad.

(c) It is a densely populated and an intensively cultivated area.

(d) With its adequate water supply and favourable climate, it is agriculturally a very productive part of India.

(e) The Northern plains are broadly divided into 3 sections.

(f) The Western part of the Northern plains is called the Punjab plains, formed by the Indus and its tributaries.

g) The Ganga plain extends between the Ghaggar and the Teesta rivers, spread over the states of Haryana, Delhi, UP, Bihar and West Bengal.

h) The Brahmaputra Plain to the East of the Ganga plains lies the Brahmaputra plain covering the areas of Assam and Arunachal Pradesh.

Q.7. Write short notes on the following
(i) The Indian Desert
(ii) The Island Groups of India
(ii) The Central Highlands

Answer
(i) The Indian Desert

(a) The Indian desert lies towards the Western margin of the Aravali hills.

(b) It is an undulating sandy plain covered with sand dunes.

(c) This region receives very low rainfall, below 150 mm per year.

(d) It has arid climate with low vegetation cover.

(e) Streams appear during the rainy season. Soon they disappear into the sand as they do not have enough water to reach the sea.

(f) Luni is the only large river in this region.

(g) Barchan (Crescent shaped duners) cover the larger areas but longitudinal dunes become more prominent near the Indo-Pakistan border.

(h) The Indian desert is popularly known as the Thar desert.

(ii) The Central Highlands

(a) The Peninsular plateau consists of two broad divisions, namely the central highlands and the Deccan plateau.

(b) The part of the Peninsular plateau lying to the north of the Narmada river covering a major area of the Malwa plateau is known as the Central Highlands.

(c) They are bound by the Vindhya Range from the south and by the Aravali hills from the north-west.

(d) The further westward extension gradually merges with the sandy and rocky desert of Rajasthan.

(e) The flow of the rivers draining this region, namely the Chambal, the Sind, the Betwe and Ken is from south-west to north-east.

(f) The central highlands are wider in the west but narrower in the east.

(g) The eastward extensions of their plateau are locally known as ‘Bundelkhand’ and Baghelkhand.

(h) The Chhotanagpur plateau marks the further eastward extension drained by the Damodar river.

(iii) The Island Groups of India

India has two groups of islands namely the Lakshadweep group and the Andaman and Nicobar group.

(a) The Lakshadweep Islands Group lie close to the Malabar coast of Kerala.

1) These islands are composed of small coral islands.

2) Earlier, they were known as Laccadive, Minicoy and Amindive. In 1973, these were renamed as the Lakshadweep.
3) They cover a small area of 32 sq km.
4) Kavaratti Island is the administrative headquarters of Lakshadweep.
5) This island group has a great diversity of flora and fauna.
6) The Pitti Island, which is uninhabited, has a bird sanctuary.

(b) Andaman and Nicobar Islands 

1) The elongated chain of islands located in the Bay of Bengal extending from north to south are the Andaman and Nicobar Islands.
2) They are bigger in size and more numerous and scattered than the Lakshadweep Islands.
3) The entire group of islands is divided into two broad categories, the Andaman in the north and Nicobar in the south.
4) It is believed that these islands are an elevated portion of the submarine mountains.
5) These islands are of great – strategic importance for the country.
They have great diversity of flora and fauna.
6) These islands lie close to the equator experience equatorial climate and have thick forest cover.

Map Skills

On an outline map of India show the following.

(i) Mountain and Hill Ranges

(ii) Peaks K2, Kanchenjunga, Nanga Parbat and the Anai Mudi.

(iii) Plateaus Chhotanagpur and Malwa.

(iv) The Indian Desert, Western Ghats, Lakshadweep Islands.

Answers

Project/ Activity

Locate the peaks, passes, ranges, plateau hills and duns hidden in the puzzle. Try to find where these features are located. You may star your search horizontally vertically or diagonally.

clip_image002

Answers

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Horizontally the features are
1. Nathula
4. Kanchenjunga
7. Patli
2. Cardamom
3. Garo
5. Anaimudi
6. Everest

Vertically the features are
1. Chottanagpur
4. Jaintia
7. Shipkila
10. Sahyadri
2. Aravali
3. Konkan
5. Malwa
6. Nilgirl
9. Bomdila
8. Vindhya
11. Satpura (this one is from bottom to top)

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