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Matter   Photo by  Nicole Avagliano  from  Pexels As we look at our surroundings we see a great number of things with a variety of shapes, textures and sizes. In classical physics and general chemistry, everything around us that have mass, volume, and occupy space is called matter. All physical objects are composed of  matter , and an easily observed property of  matter  is its state or phase.  So we can say that everything in this universe is composed of a material or substance in scientific term we called “ matter ”.               Since the ancient times, humans have been trying to understand their surroundings. Do you know that early Indian philosophers differentiated matter in the theory of Pancha Tattva (from Sanskrit Pancha meaning "five" and Tattva "truth" or "reality") specifically to the five aspects of God or Absolute Truth or     The " panchamahabhutas...

  Fossil fuels Photo by Alejandro Quintanar from Pexels Some the fuels which we use in our daily life are: coal, petroleum and natural gas. These were formed from the dead remains of living organism (fossils) that is why these are all known as fossil fuels. What is Petroleum? Photo by Ekaterina Belinskaya from Pexels Petroleum is a dark oily substance, it has an unpleasant smell. It is a mixture of various constituents such as petroleum gas, petrol, diesel etc. The world’s first deposit of petroleum was drilled in Pennsylvania, USA in 1859. After in India the first deposit of Petroleum was founded at Makum in Assam in year 1866-67. In India Petroleum is found in Gujarat, Assam, Mumbai High, and river basins of Krishna and Godavari. How was Petroleum formed? Petroleum was formed from the dead matter of organisms living in the sea (aquatic animals and plants, microorganisms too.) got settled down at the bottom of the sea and clay. Over millions of ye...

Eye is one of our most wonder sense organ in our lives. By the help of eyes we can see our surroundings, they are trees, clouds, rainbows, rivers, ponds, plants, people and birds flying in the blue sky, at night moon and stars and many other things. And it is the sense of sight that helps us to read and write etc. But how the blind persons read or write we will discuss later. So it is important to understand its structure and working.   We see things only when light coming from them enters ours eyes. The eye has a roughly spherical shape. The outer coat of the eye is white. It is tough so that it can protect the interior of the eye from accidents . Its transparent front part is called cornea. Behind the cornea, a dark muscular structure is present called iris. In the iris, there is a small opening called pupil. ·          The size of pupil is controlled by the iris. · ...