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Social StudiesClass 9CBSE

Give an account of the Northern Plains of India.

The Northern Plains are the most recent landforms. The northern plains are formed of alluvial deposits. The northern plain has been formed by the interplay of the three major river systems, namely — the Indus, the Ganga and the Brahmaputra, along with their tributaries. This plain is formed of alluvial soil. The deposition of alluvium in a vast basin lying at the foothills of the Himalaya over millions of years formed this fertile plain. It spreads over an area of 7 lakh sq. km.

Social StudiesClass 9CBSE

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

The major physiographic divisions of India are The Himalayan Mountains The Northern Plains The Peninsular Plateau The Indian Desert The Coastal Plains The Islands Contrast the relief of Himalayan region and Peninsular Plateau Geologically, the Peninsular Plateau c

Social StudiesClass 9CBSE

the Western Ghats and the Eastern Ghats

The Western Ghats Lie parallel to the Western Coast. They are continuous and can be crossed through passes only. The Western Ghats’ average elevation is 900 – 1600 metres. The Western Ghats cause orographic rain by facing the rain-bearing moist winds to rise along the western slopes of the Ghats. The height of the Western Ghats progres

Social StudiesClass 9CBSE

Distinguish between (i) Bhangar and Khadar

Bhangar Lies above flood plains of the river. Older alluvium or old soil and forms the largest part of the northern plains. Khadar It is a newer, younger deposit of flood plains. It is renewed every year.

Social StudiesClass 9CBSE

Name the island group of India having a coral origin.

The Lakshadweep Islands is the island group of India having a coral origin.

Social StudiesClass 9CBSE

Which plateau lies between the Aravali and the Vindhya ranges?

The Malwa plateau lies between Aravali and Vindhya ranges.

Social StudiesClass 9CBSE

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

The northernmost range is known as The Great or Inner Himalayas or Himadri. Himachal or Lesser Himalaya. Outer Himalayas or Shiwaliks.

Social StudiesClass 9CBSE

(i) What is the bhabar?

The northern plains are generally described as flatlands, with no variations in their relief. However, that is not true. These vast plains also have diverse relief features. According to the variations in relief features, the northern plains can be divided into four regions. The rivers, after descending from the mountains, deposit pebbles in a narrow belt of about 8 to 16 km in width lying parallel to the slopes of the Shiwaliks. This region is known as bhabar.

Social StudiesClass 9CBSE

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

Answer: C

Social StudiesClass 9CBSE

The western coastal strip, south of Goa is referred to as (a) Coromandel (b) Konkan (c) Kannad (d) Northern Circar

Answer: (c)

Social StudiesClass 9CBSE

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

Answer: (c)

Social StudiesClass 9CBSE

A landmass bounded by the sea on three sides is referred to as (a) Coast (b) Island (c) Peninsula (d) None of the above

Answer: (c)

Social StudiesClass 9CBSE

Several species of plants and animals are endangered in India. Why?

The reasons are as follows: Increasing population Pollution Deforestation Hunting by poachers.

Social StudiesClass 9CBSE

Name different types of vegetation found in India and describe the vegetation of high altitudes.

The different types of vegetation found in India are listed below: Tropical evergreen forests Tropical deciduous forests Tropical thorn forests and scrubs Montane forests Mangrove forests The characteristics of vegetation in high altitudes are as follows: Alpine vegetation is found i

Social StudiesClass 9CBSE

Tropical evergreen and deciduous forests

Tropical Evergreen Forests: They are called rainforests. No definite time for trees to shed leaves. Rainfall is more than 200 cm. Tropical Deciduous Forests: They are called monsoon forests. Trees shed leaves for about six to eight weeks in the dry summer. The rainfall range is betwe

Social StudiesClass 9CBSE

Flora and Fauna

The plant species of a particular region is called flora, and the animal species of a particular region is called fauna.

Social StudiesClass 9CBSE

Name two animals having habitats in the tropical and montane types of vegetation.

Tropical: Tiger, Elephant. Montane: Snow Leopard

Social StudiesClass 9CBSE

What is a bio-reserve? Give two examples.

Bio-reserves are protected areas. This is done to protect natural vegetation, wildlife and the environment. Examples: Sunderbans Gulf of Mannar

Social StudiesClass 9CBSE

What factors are responsible for the distribution of plants and animals in India?

Climatic conditions: Temperature Humidity Photoperiod Precipitation Relief: Land Soil

Social StudiesClass 9CBSE

(iv) Which one of the following bio-reserves of India is not included in the world network of bio reserves? (a) Manas, (b) Gulf of Mannar, (c) Nilgiri, (d) Nanda Devi

Answer: (a) Manas

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