This seems to be a very easy question and almost everybody thinks that the answer for this question is very simple that the sky appears dark in night because earth’s rotating around the sun. The part of earth which moves away from the sun will not receive the sunlight and hence sky appears dark. But [...]

Easter is a festival celebrated all over the world by the Christians but the date of Easter changes every year according to the Gregorian calendar which is a calendar accepted all over the world for civil use. Gregorian ecclesiastical rules determine the date by going back to 325 CE to the first council of Nicaea [...]

Milk contains many bacteria which are not harmful for human beings. One of which gives milk sweet characteristic and the other gives it sour characteristic sweet one works more efficiently under the cold condition and sour one works more efficiently in warm conditions. When the milk is warm the bacteria causing sweetness is overpowered by [...]

Any substance which alters our state of consciousness in just a minute is addictive and alcohol is one of them. Our mind gets habitual for this “crave” or “high” state of consciousness.
Alcohol makes its way through the small intestine and the stomach and it reaches to the brain in just 30 seconds which triggers and [...]

The tower of Pisa is approximately 56m high having eight storeys which have different balls that sound different from each other. If we climb up to the tower we will definitely have strange experience because it is leaning at a sharp angle.
The construction of this tower was started in 1173 i.e. nearly 800 years back. [...]

We all know that snow is a frozen ice crystals. Then why snow is white? As the frozen water is clear and transparent.
A collection of number of ice crystals are known as snow. When light falls on the layer of snow it passes from ice crystals on top. The light slightly moves from its original [...]

When we put paper or a piece of wood or say something else onto fire we will see smoke rising from it but when it reaches a point where it is completely burnt and we are left with only “glowing embers” we will notice that no smoke is produced but fire still produces the heat. [...]

We have often seen rainbow in the sky after it has rained. When the light coming from the sun passes through the tiny droplets of water in the air exactly after it has rained we are able to see rainbow in the sky. We know that the light coming from the sun consists of different [...]

Many times we have seen reddish brown flakes on the metal. This is known as rust. When iron reacts with oxygen it forms a new substance called iron oxide. This can happens only if the oxygen level is enough for reaction. Chemical reaction takes place in this process. Iron never reacts with the oxygen present [...]

When we open the bottle of soda we always notice the fizz. This is because during the soda manufacturing large number of molecules of carbon dioxide gas are forced into the bottle and are dissolved at a pressure up to 1200 pounds per square inch in the water than it would be in the normal [...]

The process of corn popping reached to its perfection by the Native Americans for at least five thousand years back. The process was made more simple with the development of machines for this purpose.
Popcorn kernel has four main parts
1) Pericarp which is the outer coat
2) Endosperm is the starchy part that contains all starch and [...]

If we compare ballpoint pen with fountain pen it is cheaper and less messy.
As the name suggests we use ball in the ball point pen which is made up of steel, brass or tungsten carbide. The ball always remains rotating on the tip to disperse the ink while we are writing. Ball is located between [...]

While buying sunglasses all of us think that it protects our eyes from high intensity light. So how they work in the protection of our eyes? Tinting of glasses determines the amount of light we are exposed to. The black and grey tinted lenses provide most of the protection to our eyes and color distortion [...]

Due to the rising of humid air thunderstorm is formed. Air rises up because of many factors like heating by sun, melting of two different steams of air or facing of air uphill. This heated air rises up and condense at a certain height forming a cloud. If it rises further water droplets [...]

We all know that when sunrays reach to earth they heat the surface of rivers, lakes, ocean and other water bodies leaded into process called evaporation. These vapors start rising and it is the tendency of warm air to hold more water vapors. So when it reaches to height where temperature is low. Warm air [...]

Mostly we all had heard that clouds forms because of evaporation but how the whole process works is the question.
Sunrays reach to the ground supplying heat to all the objects and also in the air of our environment. Now this air which had gained heat tends to become lighter in weight so it starts rising [...]

Hurricane is one of the most violent storms experienced by earth. These storms are cyclones, typhoons etc. they are called as tropical cyclone and that form over eastern Pacific Ocean and Atlantic Ocean are known as hurricanes. For the formation of hurricane the water temperature must be 26.5 degree centigrade or above and depth of [...]

We know that leap year occurs after every four years. Earth revolves around the sun in 365 days, five hours, 48 minutes and 46 seconds but we take one year of 365 days. There is still five hours left for the earth to complete its revolution around earth which is approximately ¼ of a [...]

The main reason behind the seasons on earth is it’s tilt on its axis. Axis is an imaginary line passing through the poles. 23.5 degree angle is formed to the perpendicular of the orbit of earth and axis always points in the same direction throughout the year.
Rays coming from sun hits at smaller angle as [...]

When there is a great difference among the positive electrons of cloud in upper part and negative electrons of cloud in the lower. Then an energy discharge takes place causing the lightening to strike within the cloud and when there is enough difference of charge between one cloud and another lightening takes place to maintain [...]