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हड़प्पा सभ्यता

    हड़प्पा सभ्यता की खोज ▶1921 ई० में रायबहादुर साहनी ने हड़प्पा नामक स्थान पर सर्वप्रथम इस महत्वपूर्ण सभ्यता के अवशेषो का पता लगाया। ▶1922 ई...

  • Temperature
    The temperature you feel everyday is the temperature of the atmosphere. The degree of hotness and coldness of the air is known as temperatur...
  • Earthquake and Volcanoe
    Endogenic forces sometimes produce slow movements.sudden movements like earthquaks and volcanoes cause mass destruction over the surface of ...
  • Atmosphere
    Our atmosphere is divided into five layers starting from the earth's surface. These are Troposphere, Stratosphere, Mesosphere, Thermosph...