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9th Standard CBSE Social Science - Physical Features of India Four Marks Questions

Published on: 21/09/2019

Physical Features of India

Download CBSE Class 9th Standard CBSE Social Science question papers, sample papers, important questions, and previous year solved papers in PDF format. Get free study materials, NCERT solutions, and exam preparation resources for Class 9th Standard CBSE Social Science

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Std: 9th Standard CBSE - Social Science

chapter: - Model Question paper

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Questions:

Generic 2

5 x 2 = 10

Name the only active volcano of the country. Where is it situated?

Which coast is known for its back waters?

Eastern Coastal Plains are more fertile because. Give reasons.

Name the island group of India having coral origin.

Which plateau lies between the Aravali and the Vindhyan ranges?

Generic 3

5 x 3 = 15

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

Describe how the Himalayas were formed.

Describe the Indian Desert.

Describe about the formation of the Peninsular plateau write any four of its distinct features.

10.

Distinguish between Converging and diverging tectonic plates

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Answers Key:

Generic 2

5 x 2 = 10

Barren Island, situated in the Andaman and Nicobar group of Island.

The malabar coast in kerala (near Kottayam)

Eastern Coastal Plains are more fertile because:
(i) These are wide and level, while western coastal plain is narrow plain.
(ii) Large rivers such as the Mahanadi, the Godavari, the Krishna and Kaveri have formed extensive delta on this coast. These rivers also provide irrigations to surrounding area.

Lakshadweep

Malwa plateau

Generic 3

5 x 3 = 15

Major physiographic divisions of India
(i) The Himalayan Mountains
(ii) The Northern Plains
(iii) The Peninsular Plateau
(iv) The Indian Desert
(v) The Coastal Plains
(vi) The Islands

The Himalayan Region	The Peninsular Plateau Region
1. Himalayan Mountains comprises greatest and highest mountain ranges of the world.	1. The Peninsular plateau is rugged, dissected and is a remnant portion of the great old landmass called the Gondwana land.
2. These mountains are the young fold mountains and have come into existence as a result of the uplift of the strata formed by the sedimentary rocks	2. This plateau is the result of the split of the old landmass, the Gondwana land. It has old crystalline igneous and metamorphic rocks in abundance.
3. These mountain ranges are arranged parallel. They are separated by the intervening valleys and undulating plains.	3. These plateaus have been dissected by rivers, faulting and vertical movements of the earth.
4. The ranges abound in I-shaped valleys and U-shaped valleys.	4. There is abundance of forests, rift valleys and troughr.
5. Perennial rivers originate from the snowcapped mountain ranges.	5. In the absence of snow-capped mountain ranges the rivers originating in this region are rainfed and seasonal.
6. Major mountain peaks situated in the Himalayas include the Everest," the Kanchenjunga, the Nanda Devi, the Wailash, etc.	6. The Anai Mudi, the Doda Beta, Kalsubai, Mahableshwar, etc. are important peaks or hillocks.

Formation of the Himalayas:
(i) The convection currents and the lateral compressional forces were responsible for the formation of the Himalayas or great Himalaya Range.
(ii) In between the Gondwana land and the Eurasian Plate there was a narrow, elongated trough called the Tethys Sea. It was filled with sedimentary rocks.
(iii) Convectional currents in the crust split it into several plates.
(iv) The Indo Australian plate after separating from the Gondwana land drifted towards north. As a result both the north and southern plates collided.
(v) Due to collision, the sedimentary rocks accumulated in the geosyncline of the Tethys, got folded and uplifted.
(vi) The uplifted folds in course of time assumed the stature of the Himalayas and the West Asian mountain system.

1. The Indian desert lies towards the western margins of Aravali Hilla
2. It is also called Thar Desert, and extends to Sindh province of Pakistan.
3. It is an undulating sandy plain coverd with sand dunes.
4. It has very low rainfall, below 150 mm per year.
5. It has arid climate.
6. It has very less vegetation.
7. Streams appear during the rainy season, but they disappear into sand due to very less water.
8.Luni is only river in this region.
9. Brachans (crescent shaped dunes) cover larger areas. Longitudinal dunes become more prominent near the Indo-Pakistan boundary.

Formation:
(i) Peninsular plateau was formed due to thing and drifting of the Gondwana land.
(ii) It was composed of the old crystalline, igneous and metamorpbic rocks.
(iii) It was the oldest landmass of India
Features:
1. Penisular plateau is a tableland
2. It is the oldest landmass of india
3. Black soil area of the Peninsular plateau is known as the Deccan Trap.
4. Western Ghat and the Eastern Ghats are the another distinctive features.

10.

Converging Plates	Diverging plates
1. Two plates coming towards each other are called converging plates.	1.Two plates going in opposite directions from each other are called diverging plates.
2. They form convergent boundary.	2. They form divergent boundary.
3. they may collide and crumble or may slide under the other.	3. they may collide and crumble or they may not slide under the other.
4. they may horizontally pass each other and transform boundary	4. they may diverge horizontally but do not transform boundary
5. They cause folding and mountains building.	5. They cause faulting.
6. They have formed present land features of the Himalayas.	6. Rift valleys, Black mountains, etc. are the result of these plates.