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III. Answer the following questions in, brief., 1. Name the three main physiographic, divisions of India.Identify the ancient, land mass to which the peninsular part, of India belonged., Ans : The three main physiographic, divisions of India are –, The Himalayan Mountain system, The Northern Plains, The Peninsular Plateau
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The peninsular part of India belonged to, the ancient land mass called Gondwana, land., 2. What was the role of the Tethys Sea, in the formation of Himalayas?, Ans : The intervening space between, the two land masses, ie the Angara land, and the Gondwana land was filled by a, shallow sea called Tethys Sea. In due, course of time, the sedimentary rocks, of the shallow Tethys Sea got, compressed and folded along the, convergent boundary to form the
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Himalayan mountains and the, mountains of western Asia., 3.Give 3 features of the Himalayan, mountains, Ans : i) The Himalayan mountains are, the highest mountain ranges in the, world., ii) They extend from the river Indus in, the west to the river Brahmaputra in, the east., iii) The Himalayas consist of parallel, ranges, each having a distinct height
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4.Name and describe the two broad, divisions of the Deccan Plateau., Ans : The two broad divisions of the, Deccan Plateau are, 1) Western Ghats : A continuous and, unbroken mountain range, extending, from Tapi River to Kanyakumari. The, height varies from 900-1600 m, though, some peaks are over 2,500m. The, topography of the western ghats is, characterised by steep sided valleys,, narrow gorges and waterfalls.
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Eastern Ghats : They are a broken, range, of lower elevation and far from, the coast. They consist a number of low, hills with an average height of only 600, m. Large rivers have dissected the, mountain in numerous places., 5. Describe some typical features of the, Indian Desert., Ans : The region receives less than, 100mm of rain annually and, experiences an arid, hot climate., Vegetation in negligible, mainly, consisting of xerophytes. The soil being, porous, surface water is lacking. During
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monsoon, there are some runoffs, but, they soon disappear into the sand., IV. Give reasons for the following., 1. The Shiwalik mountains are prone, to landslides, Ans : This range has been formed by, sediments brought down by rivers from, the Himadri and Himachal ranges., These unconsolidated materials make, this region very prone to earthquakes, and landslides.
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2. Why is the Terai wet and marshy?, Ans: Terai is wet and marshy due to the, re-emergence of the underground rivers, from the Bhabar belt., 3. The Eastern Ghats are broken in a, number of places, . Ans : The Eastern Ghats forms the, eastern boundary of the Deccan, plateau. They are a broken range, of hills with an average height of, only 600 m. They are broken by the, rivers flowing through them, Map Skill
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On a map of India, label and mark the, following using suitable symbols., Highest peak of Himalayas in India, Konkan and Coromandel Coast, The Union Territory whose capital is, Port Blair, Anai Mudi, Tropic of Cancer
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The island groups that are a part of, India
