Questions and Answers of Modern Science.
A test-tube baby is no different from any other baby. But instead of beginning to grow inside its mother’s womb, it begins its life outside, in a special glass dish called a test-tube. An ovum (egg) is taken from the woman and is fertilized with the man’s sperm in a dish……. [… More info ..]
Ordinary water does not remove dirt from things because grease and water do not mix. So soap is one of the most common cleansing agent used all over the world. People use soaps and detergents to clean their skin, clothes, utensils and many other objects…. [… More info ..]
An artificial satellite is a man-made Moon that orbits around the Earth. With the help of rockets, they are launched into geostationary orbits. Artificial satellites are of many different shapes and sizes and are sent into orbit for several different reasons. They usually have solar cells which convert the energy of the Sun into electricity which is used to run the satellite instruments….. [… More info ..]
A refrigerator is a cabinet used for keeping food and other substances cool and fresh. It has solved the problem of storing food for short periods, particularly in hot climates. The freezing compartment can store foods for months together….. [… More info ..]
A Planetarium is a special type of building where a dumbbell shaped planetarium projector is used to recreate the night sky on the inside of the dome-shaped ceiling. It is a very complex instrument fitted with lenses, prisms and mirrors….. [… More info ..]
A camera is the instrument that will give us a picture of a person or a scene called a photograph, that can be kept for sweet memory. It has become one of the most important means of communication and expression in modern times. Basically, a camera is a dark box fitted with a lens on one side…. [… More info ..]
Perfume is a blend of substances made from plant oils, flowers and synthetic materials which produce a pleasant smell. People use perfumes to make themselves smell sweet and more attractive. The word perfume comes from Latin, perfumum which means ‘from or through smoke’. The earliest makers of perfumes burnt aromatic woods and gums, using their perfumes at religious ceremonies…. [… More info ..]
Paper gets its name from papyrus (a tree with thick fibrous stems), a plant that grows in the swamps in Egypt. The ancient Egyptians made a kind of paper from papyrus. But the Chinese invented the art of making paper as we know it today. About 1900 years ago the Chinese learned to separate the fibres from the mulberry bark…. [… More info ..]
The first concrete step to land on moon was taken by the Russians when they launched the artificial satellite Sputnik I on 4 October, 1957. A month later on 3 November, 1957 a bigger Sputnik II was sent into the space. It took along, the first living creature, a dog named Liaka…. [… More info ..]
John A Larson, a medical student from California University developed a machine in 1921 which can detect lies with a fair degrees of accuracy. This machine is know as ‘Polygraph’ or a Lie Detector. In 1927, the American inventor Allan Bell another improved model of a Lie Detector which was able to detect slight tremblings in the voice which often occur when a person tells a lie….. [… More info ..]
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