Physical Features of India Class 9 Flashcards

The movements cause stresses which cause folding, faulting and volcanic activities.

Convergent boundary, divergent boundary and transform boundary.

The Indian peninsula is the oldest part of the Indian subcontinent as it was part of the Gondwana land. This landmass included countries like India, Australia, South Africa, South America and Antarctica.

<p>Convectional currents split the crust of the Earth and the Indo-Australian plate was separated from the Gondwana land and the plate moved into the north, Subsequently, the Australian plate got separated from the Indian plate and the Indian plate hit the Eurasian plate.</p> Signup and view all the answers

<p>When the Indian plate hit the Eurasian plate, the sedimentary rocks in the Tethys sea folded to form the Himalayas.</p> Signup and view all the answers

<p>The formation of the Himalayas made a depression. This depression gradually got filled with sediments by flowing rivers from the mountains in the north and peninsular plateau in the south which led to the creation of the alluvium filled northern plains of India.</p> Signup and view all the answers

<p>The peninsular plateau is the most stable and the Himalayan mountains are the most unstable.</p> Signup and view all the answers

<ol> <li>The Himalayan mountains. 2) The Northern plains. 3) The Peninsular plateau. 4) The Indian Desert. 5) The Coastal Plains. 6) The Islands.</li> </ol> Signup and view all the answers

<p>They run in a west to east direction, from the Indus to the Brahmaputra. They are the most loftiest and rugged mountain barriers of the world. They form an arc which is 2,400 km long.</p> Signup and view all the answers

<p>Most continuous range. Loftiest peaks in the world with an average height of 6 km. The core is composed of granite. Perennially snowbound. There are many glaciers.</p> Signup and view all the answers

<p>Lies to the south of the Himadri. Known as the lesser Himalayas with an altitude range from 4.5 km to 3.7 km. Famous valleys like Kangra and Kullu.</p> Signup and view all the answers

<p>Width of 10-50 km. Altitude of 0.9 km to 1.1 km. Ranges composed of unconsolidated sediments brought down by rivers from main Himalayan ranges.</p> Signup and view all the answers

<p>Mount Everest in Nepal at about 8,848 m and Kanchenjunga in India at 8,598 m.</p> Signup and view all the answers

<p>Divisions are separated by rivers: 1) Punjab Himalayas (Indus and Satluj rivers). 2) Kumaon Himalayas (Satluj and Kali rivers). 3) Nepal Himalayas (Kali and Tista rivers). 4) Assam Himalayas (Tista and Dihang rivers).</p> Signup and view all the answers

<p>The Brahmaputra marks the end of the Himalayas at the east. After the Dihang gorge, the mountains bend sharply to the south and spread along the eastern boundary of India, known as Purvachal.</p> Signup and view all the answers

<p>Formed due to the Indus, Ganga and Brahmaputra with their tributaries. Alluvial soil.</p> Signup and view all the answers

<ol> <li>Punjab plains (formed by Indus and tributaries). 2) Ganga plains (between Ghaggar and Teesta rivers). 3) Brahmaputra plains (mostly in Assam).</li> </ol> Signup and view all the answers

<ol> <li>Bhabar (deposits pebbles parallel to the Shiwalik slopes). 2) Terai (wet and marshy). 3) Bhangar (largest part containing calcareous deposits).</li> </ol> Signup and view all the answers

<p>Composed of old crystalline, igneous and metamorphic rocks. Oldest landmass as it was originally part of Gondwana land.</p> Signup and view all the answers

<p>North of the Narmada river, covers most of the Malwa plateau. Wider in the west and narrower in the east.</p> Signup and view all the answers

<p>Triangular landmass, lies to the south of the Narmada river, higher in the west and gently slopes towards the east.</p> Signup and view all the answers

<p>Western Ghats and Eastern Ghats bound the Deccan Plateau. They lie parallel to their respective coasts.</p> Signup and view all the answers

<p>0.9 km - 1.6 km elevation, cause rain by forcing rain-bearing winds to rise along the slopes.</p> Signup and view all the answers

<p>0.6 km elevation, discontinuous and irregular, dissected by rivers.</p> Signup and view all the answers

<p>Deccan Trap, black soil with volcanic origin, Aravali hills lie on the west and northwest.</p> Signup and view all the answers

<p>Lies towards east of the Aravali Hills, sandy plain covered with sand dunes, rainfall below 150 mm per year.</p> Signup and view all the answers

<p>The peninsular plateau is surrounded by coastal strips along the Arabian Sea and the Bay of Bengal.</p> Signup and view all the answers

<p>India has two islands, Lakshadweep and Andaman and Nicobar Islands.</p> Signup and view all the answers

<p>Mountains provide water and forest wealth; northern plains are granaries of the country; plateau provides minerals.</p> Signup and view all the answers