While conduction is the transfer of heat energy by direct contact, convection is the movement of heat by actual motion of matter; radiation is the transfer of energy with the help of electromagnetic waves. The matter is present around us, in three states, solid, liquid and gas. The conversion of matter from one state to another is termed as a change in state, that takes place due to the exchange of heat between the matter and its surroundings. So, heat is the transition of energy from one … [Read more...]

In your surrounding, you might have observed there are millions of objects, which are created out of matter and the matter comprises of molecules, which is a combination of two or more atoms bonded together. So, in short, atoms are grouped together to form a molecule, which embodies the objects around us. The whole universe is made up of the atom, and they are so small particles of an element, that we are not able to see them through bare eyes or even via microscope, but they do exist in each … [Read more...]

The terms science and technology, are often pronounced in the same breath and used as synonyms, because they are closely intertwined, that their difference is many a time ignored. Science is all about acquiring knowledge of the natural phenomenon along with the reasons for such phenomenon, like Why the sky is blue? Why are leaves green? Why rainfall occurs? What are the colours of the rainbow? How do plants make their food? And so forth. When this knowledge is put to practice, to solve human … [Read more...]

Energy is the strength needed to perform work, while the rate at which work is performed is called power. The unit of measurement in energy is termed as joules, whereas, a watt is the measurement unit of power. A fine line of difference exists in the way we use the word 'work', in our routine activities and in science. As in our day to day life, work entails the physical and mental strain, such as dancing, singing, cooking, bathing washing, learning, etc. However, in science work implies the … [Read more...]

Eclipse alludes to the blocking of light from an astronomical object by the passage of another amidst it. It is an event in which three celestial bodies, i.e. the sun, moon and earth are in tandem. When the moon is in the middle of sun and earth, a solar eclipse occurs, and if the earth is in between sun and moon, it is the case of the lunar eclipse. The reason for the occurrence of the eclipse is that there are two points where the orbit of the moon passes through sun's plane called as … [Read more...]

The lens is understood as a curved and transparent piece of glass or plastic, which focuses and refracts light rays in a certain manner. The curvature of the object ascertains the extent to which light is bent and in which direction. They are used in spectacles, microscope and telescopes. Based on the shape, the lens can be grouped as a convex lens or concave lens. The former brings together the parallel beam of light, while the latter disperses it. So, the point of focus in case of the … [Read more...]

These natural resources are classified into two categories, i.e. renewable and non-renewable resources. In the first category, all those resources which are available in infinite quantity and can be used again and again are included, while in the second type, the resources which are limited and will extinct in future are considered. Living organisms are blessed with gifts of nature, as it made our earth, the best place to reside. The thought of life would be unimaginable, without the … [Read more...]

The objects surrounding us are created out of matter, and it is present in three forms, i.e. element, compound and mixture. Chemistry is that branch of science which deals with these three forms. Elements allude to those substances that can't be split into simpler substances. The compound is the chemical combination of elements, bonded together in specific proportion. The mixture is the physical combination of substances, bonded together in any proportion. While the compound is a pure … [Read more...]

Identification of metals and non-metals is a bit difficult if you do not have any idea of their characteristics. While a metal is a solid substance, usually hard, lustrous and opaque. On the other hand, a non-metals is a solid or gaseous material, in which the metallic properties are absent. The matter is a physical substance that occupies space and has mass. It is present in three forms, which are elements, compound and mixture. Out of these three forms, elements is the purest form of matter … [Read more...]

The two phenomena based on straight light propagation are reflection and refraction, wherein the reflection deals with the bouncing of light rays whereas the refraction talks about bending of light rays. Our world is full of objects that we can see only with the help of light. If there is the absence of light in a room, nothing is visible to us. Have you ever wondered, how can we perceive things with eyes? In the daytime, it is the light rays coming from the sun, that help us to see objects, … [Read more...]