The Khilafat Movement, 1919-1920

Khilafat Movement: The Jallianwala Bagh massacre took place at a time when the Indian Muslims were extremely agitated over the pan-Islamic Khilafat issue, which originated as a result of Turkey’s entry into the First World War as an ally of Germany against Britain. The Sultan of Turkey, ruler of the vast Ottoman Empire, was the Caliph …

Rowlatt Act, 1919

Rowlatt Act: In view of the growing revolutionary terrorism and the on-going First World War, the Governor-General Chelmsford appointed a committee (the sedition or Rowlatt Committee) under the Presidentship of Sydney Rowlatt, a Judge of the King’s Bench in London, to investigate the nature and extent of revolutionary activities and to suggest legislation, if necessary, to …

The Home Rule League, 1916

Home Rule League: The Radicals failed to be allowed re-entry into the congress at its session in 1914, but consistent efforts throughout 1915, including the campaigns launched separately by Annie Beasant and Tilak through newspapers and local associations, secured them their re-entry in December 1915. The opposition to the Radicals was also considerably lowered by the …

Difference between prokaryotic and eukaryotic cell

What do you mean by Prokaryotic Cells? Prokaryotic cells have a single membrane or one envelope system where there exist no definite cell organelles. The protoplasm is not differentiated to the nucleoplasm and cytoplasm and the genetic material occurs without any nuclear membrane. The naked genetic material is called a nucleoid. The bacteria and blue-green algae …

Concept of an Electric Charge

Electric Charge: The matter on the earth which occupies the space may be solid, liquid or gaseous. The matter is made up of one or more elements. Each element is made up of many atoms which are of similar nature. Nowadays, scientists are successful in breaking atoms and studying the result of products. According to the …

Acid Rain: Effects & Control Measures

What is Acid Rain? Those gases which combine with water to form acids are called acidic gases. Examples of acidic gases are sulfur dioxide ( SO₂) and nitrogen dioxide (NO2). The sulfur dioxide gas present in polluted air forms sulfuric acid (H2SO4) whereas nitrogen dioxide gas present in polluted air forms nitric acid (HNO₃). When the ‘acids‘ …

Sources of Irrigation

What is Irrigation? Water is an important input for successful agriculture. Water may be available to crops in the natural course by rainfall or it may be supplied to the agricultural fields artificially by human efforts. The process of supplying water to crops by artificial means such as canals, wells, tube-wells, tanks, etc. from the sources …

Carbon Cycle In Nature

Carbon Cycle: The carbon element is often considered as the basis of all life. Carbon is a basic constituent of living organisms. In fact, carbon is the most essential constituent of all the major organic compounds of the protoplasm (living substance) like carbohydrates, fats, proteins, and nucleic acids. In other words, the carbon element exists as …

Biogeochemical Cycle

What is Biogeochemical Cycle? The biogeochemical cycle may be defined as the more or less circular path which brings about the circulation of chemicals and elements, including all essential elements from the environment to the organisms and back to the environment. Types of Biogeochemical Cycle: Gaseous Cycles: In which the reservoir is in the atmosphere. For …

Nitrogen Cycle In Nature

Nitrogen Cycle: The cyclic process by which nitrogen element is circulated continuously through the living and non-living components of the biosphere (like atmosphere, soil, water, plants, and animals) is called the nitrogen cycle in nature. In simple words, the circulation of nitrogen in nature is called the nitrogen cycle. Nitrogen gas of the atmosphere is fixed …