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 [...]
Water freezes and melts at zero degree. Unless the conditions are changed water does not freeze or melt, and a balance is maintained. Now if the temperature is lowered ice/water mixture will start forming ice and if temperature is increased ice/water mixture starts melting.
If we add salt to the mixture the conditions are changed. Now [...]
When light moves through the atmosphere it passes from gas molecules in the air. Longer wavelength of light passes straight through atmosphere for e.g.: – green, violet, yellow, etc and light of shorter wavelength is absorbed by these molecules for e.g.:- blue light. By the phenomenon called ray Leigh scattering when light passes through the [...]
Density of an object is increased with the cooling, but this is not completely applicable in the case of fresh water. It is densest at four degree Celsius and if water is further cooled its density keeps on decreasing. So a substance having less density or less mass per unit volume than other substances in [...]
Clouds appear white because the light coming from the sun has to pass through the water droplets and ice crystals or we can say that the seven colors of visible spectrum (red, orange, yellow, green, blue, indigo, violet) which when combines forms white light and this process of combining is done by water droplets or [...]
Everybody has different stories and mythological beliefs that why ocean is salty but scientific reason behind it is that some carbon dioxide is dissolved in the rain from the surroundings and water becomes slightly acidic because carbonic acid is formed with carbon dioxide and water. This acidic water causes erosion on the rocks and carries [...]
Sunlight is made up of different colors that are rainbow colors: violet, indigo, blue, green, yellow, orange, red. When sunlight falls on water some part of it is reflected back and other enters the ocean. The light gets scattered after entering the ocean by ripples and other particles in it.
Oxygen present in the deep water [...]
The reason behind why mosquito bites itch is that it takes away some blood from the body as well as leaves her saliva in the body. It is this saliva which enters the body and causes itching. Saliva of female mosquito prevents the blood to clot because it has the blood thinner or we [...]