Introduction of stars Stars are non-living structures that live for billions of years. Though they are non-living, they take birth, they grow and die like a living being. That’s why, our life span is too short to see and experience a star formation. It is quite impossible for astronomers to see a star being formed, … Read more
An endocrine gland which is bi-lobed, butterfly shaped or shield shaped. This gland secretes different hormones and these hormones have various functions. They increase basal metabolic rate and stimulate growth in children. The functions of various hormones are: A) Action on basal metabolic rate (BMR) Increases the metabolic activities in most of the body tissues. … Read more
S.N Vasectomy S.N Minilap/Laparoscopy 1. It is very effective but there is slightly higher rate of spontaneous recanalization and pregnancy. 1. It is very effective and there is slightly slower rate of failure. 2. This method becomes effective after 6 to 8 weeks of surgery. 2. This method becomes effective immediately after surgery. 3. There … Read more
The earth is surrounded by a thick layer of air. This thick layer of air is called the atmosphere. The thick layer of air that surrounds the earth’s crust is called atmosphere. The biosphere of the earth consists of three different spheres, which are: hydrosphere, lithosphere and atmosphere. The atmosphere consists of different types of … Read more
ROCK ENGINEERING Rock engineering is the application of science of rock mechanics, engineering geology and other related discipline to the civil engineering construction. ROCK MECHANICS Rock mechanics is the theoretical and applied science of the mechanical behavior of rock mass. ROCK: Compact, indurated natural material (composed of one or more mineral) that requires drilling, blasting … Read more
Introduction to soil pollution Land and soil are very essential for the survival and maintenance of living organisms including man. Soil supports vegetation on which every living animal depends. However, like air and water, soil may also get polluted. There are many natural and synthetic materials that can adversely affect the physical, chemical and biological … Read more
Introduction The natural resources include air, water, land, minerals, forest, wildlife, climate, etc. They are the gifts of nature. The terms ‘nature’ denotes the creation that is aggregate of land, air, water, light-(sun) and sky (zero). All the matters that are not man-made are natural resources. The earth consists of biotic and abiotic (non-living) things. … Read more
Introduction Family with many members are not easy to handle and will be problematic as compared to small family. So, the necessity of planning a family is felt which can be made effective by following various measures. Several scientific methods of birth control have been developed in order to have a small family. Thus, family … Read more
Introduction Tree living animals which lead an arboreal mode of life. They are classified into three types based on the adaptation to the arboreal or scansorial mode of life. 1. Wall and rock climbers Provided with claws and adhesive discs in their limbs. They can easily move on the plain surfaces of the walls. Kangaroos … Read more
There are various species of biotic community living together in the same environment. They interact with each other for various things like food, shelter and habits. They show positive as well as negative interactions. Some of them are as follows: A) Positive interactions … Read more