Natural Science

  The Himalayas: Formation, Divisions, Ranges & Significance About Himalayas      The Himalayas  are  young fold mountains  formed by the convergence of two tectonic plates. They constitute one of the 5 physiographic divisions of India. Along with acting as a grand barrier guarding India’s frontiers, they also act as a dividing range between the Tibetan Plateau in the north and India in the south. Formation of Himalayas      The Himalayas were formed several million years ago as a result of the convergence of the  Indo-Australian Tectonic Plate  with the  Eurasian (Asian) Tectonic Plate . The  series of events  that led to their genesis and evolution are listed chronologically below: Existence of Pangea and Panthalassa : Around 250 million years ago, there existed a  supercontinent  called  Pangea  (a giant formation of land under which all the continents of the world were attached togethe...

  Weather Temperature, pressure, wind, humidity and precipitation, interact with each other. They influence the atmospheric conditions like the direction and velocity of wind, amount of insolation, cloud-cover and the amount of precipitation. These are known as the elements of both weather and climate. The influence of these elements differs from place to place and time to time. It may be restricted to a small area and for a short duration of time. Very often this influence is described in the name of weather as sunny, hot, warm, cold, fine, etc depending upon the dominant element of weather at a place and at a point of time. Therefore,  weather is the atmospheric condition of a place for a short duration  with respect to its one or more elements. Two places even a short distance apart may have different kind of weather at one and the same time. Seasons Seasons are specified periods in a year which have similar weather conditions. Season is a period of the year characteri...

 SOLAR SYSTEM:      Our Solar system consists of eight planets.   The nebula from which our Solar system is supposed to have been formed, started its collapse and core formation some time 5-5.6 billion years ago and the planets were formed about 4.6 billion years ago.      Our solar system consists of the sun (the star), 8 planets, 63 moons, millions of smaller bodies like asteroids and comets and huge quantity of dust-grains and gases. Out of the eight planets, mercury, venus, earth and mars are called as the inner planets as they lie between the sun and the belt of asteroids the other four planets are called the outer planets.      Alternatively, the first four are called Terrestrial, meaning earth-like as they are made up of rock and metals, and have relatively high densities.  The rest four are called Jovian or Gas Giant planets. Jovian means jupiter-like.   Most of them are much larger than the terrestrial p...