221 Facts Tell Me What

Ozone is a form of oxygen with the chemical formula O3. Ozone is different from oxygen (O2). Oxygen is an important gas for all living organisms whereas ozone is a toxic and explosive gas. Ozone is formed in the upper atmosphere of the Earth by ultraviolet radiation. This radiation splits oxygen molecules into single atoms. […]

Petrol is a liquid fuel used for running vehicles. It is a mixture of carbon and hydrogen, commonly known as hydrocarbons*. The main property of these compounds is that they are light liquids which boil at low temperature. Carbon and oxygen combine with each other quickly as they are attracted to each other. The moment

Water is important for the growth of plants. Irrigation is the process of artificially supplying water to land or soil to help crops to grow. The need for irrigation arose when natural rainfall became insufficient for crops. People made drainages, canals, etc., to direct the reserved water, river water or flood waters towards the place

Leather is a material made from an animal hide or animal skin after being tanned or treated with chemicals to preserve them and make them suitable for use as clothing, footwear, handbags, furniture, tools, etc. The skins of cows, horses, and goats are often used to make leather. Most leather is made from cattle skin,

A thermometer is an instrument which is used for measuring temperature. It measures how cold or hot something is. There are a number of different types of thermometers. The most common type of thermometer is usually made up of a small, hollow glass tube. At the bottom of the tube is a bulb, which holds

X-rays are electromagnetic radiations, similar to radio waves, ultraviolet rays, light rays, etc. X-rays were discovered by Roentgen, a German professor in 1895. Roentgen won Nobel Prize in Physics for this discovery. He observed that these radiations could pass through soft tissue but not through bone and other objects which would cause shadow images to

Satire is a mode of communication where ‘wit’ is used for exposing someone’s foolishness, negative trait or silly acts etc. Satires often are means of provoking society, government or individuals to better themselves. For example, satires are used for ridiculing a government when it is not working for the welfare of its citizens. It is

Sand is soil that has granular appearance and found mainly on the beaches, riverbeds and in deserts. Sand is formed by the wearing and tearing down of solid rock by different weather conditions, such as rain, wind, frost, etc. These weather agents erode huge rocks and gradually break them into minute particles. The formation of

Inflation means a consistent increase in the average price of goods that we buy and the services we need meaning we will need more money to pay for goods. When inflation occurs, the same amount of money can be used for buying fewer things which means that the purchasing power of money goes down. When

A folk song is a form of music which belongs to a particular region. It goes from generation-to-generation by oral tradition. A folk song used to be a form of communication in ancient times and a form of expression. It reflects the heritage of a place. Folk songs have simple melodies and a storytelling form.

A.M. means ‘ante meridiem’ (Latin), which means ‘before midday’ and P.M. is ‘post meridiem’ which means ‘after midday’. The 24 hours of the day are divided into these two time-periods: A.M. which starts at midnight and P.M. which begins at noon. The Meridian is an imaginary line joining the north and south points of our

Humour is something that is funny, comical, or amusing that makes us laugh. Humour can be in form of a joke, a movie scene, a drama sequence or a story. Different people laugh at different things, which means what one might consider funny, may not make the other laugh at all! All kinds of people

Louis Braille was a French teacher and inventor who was completely blind. He is best known for his system of raised dots that enables blind people to read and write. This system is called Braille system and is still used today. Louis Braille published this system in 1829 at the age of 20. Braille was

Radio waves are electromagnetic radiations, mostly used for communication. They exist all around us in the form of vibrations received by cell phones, radio and television. These waves are converted into sound waves, which can be heard. Just like a pebble that creates a rippling effect when dropped in water, waves also radiate in all

Embroidery is a type of artwork, generally done on a piece of cloth with the help of threads and a needle. The pattern or design of a thread is known as embroidery. It is an ancient craft, which is very popular. Embroidery was originally a man’s profession. It improves the aesthetics of the cloth. The