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WHAT DO POLITICIANS DO???? Politicians are supposed to represent the interests of the people. Some do this as representatives in municipalities and cities, and others in the parliament or cabinet. Politicians,

WHAT IS UNIVERSE???? Universe, cosmos, and space mean the same – the space all around us and what it contains as far as we can see and think. We do not know whether the space is endless or is finite. If

WHERE ARE COMPUTERS USED TODAY???? Today, small computer chips that give instructions via electrical impulses are present in almost all the devices such as cars, televisions, coffee machines, and mobile

WHEN WAS MONEY FIRST USED???? Money is a medium of exchange of a certain value, which one cannot consume or utilize directly. Thousands of years ago people exchanged useful items with one another. Later,

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HOW CAN WE SAVE RESOURCES FOR FUTURE GENERATION???? We need to manage our national resources very carefully to ensure that the Earth remains in a habitable condition for future generations. We must preserve

DID YOU KNOW THAT??? • CITIES IN MEDIEVAL INDIA WERE FEW, BUT THEY WERE LARGE AND IMPRESSIVE.. • KNIGHTS CONSIDERED IT ‘GALLANT’ TO CAPTURE ANOTHER KNIGHT IN A FEUD AND THEN DEMAND RANDOM MONEY FROM HIM..

WHAT IS THE MILKY WAY???? The Milky Way is the white band seen in the sky at night that has puzzled people for centuries. Today, we know that it shines because of the light of millions of stars: The Milky

WHAT HAPPENS IN AN ATOM BOMB EXPLOSION???? Unlike an atomic power plant, where a chain reaction for splitting uranium is allowed to run in a controlled way, in an atomic bomb it runs at lightning speed

GREAT MEN : COPERNICUS, KEPLER, AND GALILEO For a long time people believed that the sun and the planets went around the Earth. The polish astronomer Nicolaus Copernicus (1473-1543) doubted this 'geocentric

WHAT IS A STAR???? Stars are heavenly bodies, which shine like our sun. Many shine brightly, the others have a dim glow. Some are red while others are blue. Stars are giant balls of gas made of hydrogen,

WHAT HAPPENS WHEN AN AIRCRAFT BREAKS THE SOUND BARRIER??? Jets that fly faster than sound compress the air at the front. This forms a head wave. After a certain point of time, the pressure of the air gets

ARE THERE PLANETS SIMILAR TO THE EARTH???? Three planets, Mercury, Venus, Mars, resemble the Earth to some extent. They are made up of rocks, and have a similar structure consisting of the crust, mantle,

DIFFERENT KINDS OF SPACESUITS Earlier, astronauts had only one type of spacesuit, but today they were different types of suits for different activities. For instance, there is a light-weight spacesuit

HOW WERE THE COUNTRIES FORMED???? In the Stone age, human beings roamed in tribes. When the number of people started growing, they started assigning ranks and divided the tasks among them. Gradually, villages

WHAT MAKES THE EARTH UNIQUE???? Unlike the other planets of our solar system, life developed in to many forms on the Earth after its emergence. Liquid water and oxygen for breathing made this possible.

HOW DID WE CONQUER SPACE???? Earlier outer space was the stuff of science fiction novels-today, about 800 artificial satellite are orbiting in space. These are specially designed flying machines, which

WHAT WAS THE ‘SPACE RACE’???? ` The mid-to-late 20th century saw the emergence of a keen competition between the USA and the Soviet Union, the most powerful nations after the Second World War, for

HOW CAN WE USE WIND POWER??? Years ago people used wind only for running windmills, but today we have large wind power plants with triple-blade rotors. These power plants make electricity which can be