Natural Science

WILDLIFE AND BIOSPHERE RESERVES      The term ‘Wildlife’ includes animals of any habitat in nature. Wild animals are non-domesticated animals and include both vertebrates (fish, amphibians, reptiles, birds and mammals) and invertebrates (bees, butterflies, moths etc.). India has a rich and diversified wildlife . The Indian fauna consists of about 81,251 species of animals out of the world’s total of about 1.5 million species.       Our country is home to tigers, lions, leopards, snow leopards, pythons, wolves, foxes, bears, crocodiles, rhinoceroses, camels, wild dogs, monkeys, snakes, antelope species, deer species, varieties of bison and the mighty Asian elephant. Hunting, poaching, deforestation and other anthropogenic interferences in the natural habitats have caused extinction of some species and many are facing the danger of extinction.  The Indian Board for Wildlife (IBWL):      It was constituted in 1952 to suggest means...

Drainage Systems in INDIA      A drainage system is an integrated system of tributaries and a trunk stream which collects and drains surface water into the sea, lake or some other body of water. The total area drained by a river and its tributaries is known as a drainage basin. The drainage pattern of an area is the result of the geological structure of the respective areas. The drainage system of India is broadly divided into two major groups on the basis of their location. They are Himalayan rivers and the Peninsular rivers. Himalayan Rivers        These rivers are found in north India and originate from Himalayas. So, they are also called as Himalayan rivers. These are perennial rivers.  a) The Indus River System        The Indus River is one of the largest rivers of the world. It originates from the northern slope of the Kailash range in Tibet near Manasarovar Lake at an elevation of about 5,150 m. Its length is about ...

 Physical Geography of INDIA The Great Northern Plains        This fertile plain lies to the south of the northern mountains. This plain is one of the most extensive stretches of the alluvium in the world and is deposited by the rivers Indus, Ganga, Brahmaputra and their tributaries . The length of the plain is about 2,400 km and the width varies from 240 to 320 km . Its width increases from east to west. It covers an area of over 7 lakh sq.km. The Great Plains of India is remarkably a homogeneous surface with an imperceptible slope. They are formed mostly by the depositional process of the Himalayan and Vindhyan rivers. These rivers deposit enormous quantity of sediments deposited along the foothills and flood plains. The important characteristics featuress of sediment deposition in the plains areas as follows. a) The Bhabar Plain  b) The Tarai Tract  c) The Bhangar Plains d) The Khadar Plains e) Delta  a) The Bhabar Plain      ...