Notes and Study material for Exams
Preparation of hydrogen Hydrogen is the most abundant element in the universe. The sun and other stars are composed largely of hydrogen. Astronomers estimate that 90% of the atoms in the universe are hydrogen atoms. Hydrogen is a component of more compounds than any other element. Water is the most abundant compound of hydrogen found … Read more
DETERMINANTS OF Personality Personality is a result of the combination of four factors – Physical Environment Heridity Culture Particular experiences. Personality and Environment: Geographical environment sometimes determines cultural variability. That the Eskimos have a culture different … Read more
Microscope Microscope, instrument that produces enlarged images of small objects, allowing the observer an exceedingly close view of minute structures at a scale convenient for examination and analysis. Although optical microscopes are the subject of this ARTICLE, an image may also be enlarged by many other wave forms, including acoustic, X-ray, or electron … Read more
Biological Weathering is the breakdown of rocks and minerals by living organisms. It is a type of Physical Weathering, which means that it does not involve any chemical changes. Biological weathering can be caused by a variety of organisms, including plants, animals, and bacteria. Plants can break down rocks by growing through them, while animals … Read more
Various chemical and biological weapons chemical weapons A chemical weapon is any toxic chemical that can cause death, injury, incapacitation, and sensory irritation, deployed via a delivery system, such as an artillery shell, rocket, or ballistic missile. Chemical weapons are considered weapons of mass destruction and their use in armed conflict is a … Read more
Introduction to Disaster Management: A Comprehensive Guide Introduction Disasters, both natural and man-made, are an unfortunate reality of human existence. From earthquakes and hurricanes to technological failures and pandemics, these events can cause widespread devastation, loss of life, and economic disruption. Effective disaster management is crucial for mitigating these risks, protecting lives, and ensuring a … Read more
Each organism is different from other organisms. The total number of species living on the planet is imprecisely known and published estimates vary from 12 million to over 100 million. This is because there are large numbers of species yet undiscovered and undescribed, and there is not always agreement on whether certain organisms should … Read more
Control of Pests and crop Disease agriculture is the single largest sector of India that provides the principal means of livelihood for over 58.4% of country’s Population. It contributes approximately one-fifth of the total gross domestic product (GDP). Agriculture accounts for about 10% of the total export earnings and provides raw material to … Read more
ENZYMES Enzyme, a substance that acts as a Catalyst in living organisms, regulating the rate at which chemical reactions proceed without itself being altered in the process. The biological processes that occur within all living organisms are chemical reactions, and most are regulated by enzymes. Without enzymes, many of these reactions would not take place … Read more
Concept of Organic Farming, seed certification Organic farming is an alternative agricultural system which originated early in the 20th century in reaction to rapidly changing Farming practices. Organic farming continues to be developed by various organic agriculture organizations today. It relies on Fertilizers of organic origin such as Compost Manure, green manure, and … Read more