Niels Bohr postulates the atomic model which states that electrons move in specific circular orbits around the nucleus with quantised kinetic and potential energies. Ernest Rutherford said that atom consists of the whole mass that is concentrated into the centre. From the above statement, we can say that both the models of the atom differ in the way they explained the movements of electrons around the nucleus and their energy levels. We all are aware of the modern theory which says that … [Read more...]

The Green Revolution is the programme started in India and other developing countries to increase the production of wheat and rice and become self-sufficient. On the other hand, White Revolution or Operation Flood is an association with the objective of increasing milk production in India. Let's get back to history, the Third Agricultural Revolution or the Green Revolution has its birthplace in Mexico, which started in the year 1950. It is the initiatives that consist of the set of research … [Read more...]

Conductors, semiconductors and insulators can be distinguished on the ground of their conductivity and other properties. Conductors like metals show conductivity at room temperature, but as the temperature increases, their conductivity gets reduced. However, semiconductors act as the insulators at low temperature but as the temperature increases so their conducting properties also; however, insulators have no such effect of temperature variations as they do not have the conducting … [Read more...]

The Tyndall effect explains the phenomenon of scattering of light by the colloidal particles in its path that results in the pattern of bright glowing cones in the fluid. The Brownian Motion is related to the phenomenon of random motion of colloidal particles in the fluid. These are the widespread phenomenon that can be observed easily, but only in colloids as these properties can not be observed in True solutions or Suspension. True solutions are the homogenous mixture of two or more … [Read more...]

The main difference between these two terms is the duration, where the weather is the day-to-day or short term condition of the changes in the atmosphere, and climate is the averaged weather condition of a particular place over a long time, about 30 years. Like for instance, we talk about the weather in terms of "hot it will be today?" "Will it rain or not"? Or "What about the snowstorm this week"?. On the other hand, climate changes are observed in term of years, decades and centuries and … [Read more...]

The primary difference between them is the mechanism of immunity, where the Humoral immunity produces antibodies against the antigens which are present outside the infected cells or free circulating in the blood. Cell-mediated immunity works inside the infected cells, where it destroyed the pathogens or microorganisms by the process of lysis by the releasing cytokines. Humoral immunity shows quick response against the pathogens, while cell-mediated immunity is slow in action. Both the type … [Read more...]

Elements present to the left of the line of the periodic table are said as metals, though elements present to the far right of the periodic table are said as non-metals. Metalloids or semimetals are present just to the right of metals and possess properties of metals as well as non-metals. Hydrogen (H) is an exception, which is the first element of the periodic table and normal temperature and pressure hydrogen show the properties of nonmetal. Tin, iron, plutonium, and sodium are some of the … [Read more...]