The memory of a computer is more like a predefined working place, where it temporarily keeps information and data to facilitate its performance. Each memory location has a unique memory address. When the task is performed, it clears its memory, and memory space is then available for the next task to be performed. When the power is switched off, everything stored in the memory gets erased and can not be recalled. The memory of a computer can be thought of as ‘cells’. Each of these cells is further broken down into smaller parts known as bits. A bit means a binary digit i.e. either  ..read more

 The CPU or the Central Processing Unit is the main control center and a processing unit. It is also called the brain of the computer as it guides, directs, controls, and governs the performance of a computer. The CPU has some sub-components that help in carrying out the processing of a task. These are: 1.        Arithmetic Logic Unit (ALU) 2.      Control Unit (CU) 3.      Registers www.knowledgedu.com 1.Arithmetic Logic Unit (ALU): The ALU performs all the four arithmetic (+,-,*,/) and s ..read more

  Computers are machines that have revolutionized the world around us. The way we used to live around us. The way we used to live around 25-30 years ago is very different from how we live today.. in short, in every aspect of life around us, we see computers play a role directly or indirectly.   Computers deliver so much, diligently and efficiently, all thanks to the wonderful combination of their hardware and software. · Hardware:- the physical electronic components of a computer are called hardware. EX- CPU, Mouse, Keyboard, WebCam, Printers, scanners, etc ·   &n ..read more

  www.knowledgedu.com Light materials such as wood and cork float because they are not as dense (heavy) as water. Ships can be built from heavy materials such as steel, yet still float. This is because the air inside the hull or body of the ship makes the ship lighter than the water it displaces (pushes out of the way). Water transport relies on many methods to move through water. Sailing ships use the power of the wind to travel along. Hydrofoils use ‘wings’ to travel on top of the water. Submersibles and submarines actually let in water to sink, before traveling unde ..read more

www.knowledgedu.com Aeroplanes are the fastest means of transport, able to make journeys in just a few hours that could take days by road or sea. Most modern aeroplanes are powered by jet engines that can propel some military craft along at speeds of more than 3000 km/h, three times the speed of sound. Helicopters rely on their rotor blades to hover in the air. Not all air transport needs an engine – hot air balloons use hot air and gas to stay up. On the wing: An aircraft’s wings are lifted by the air flowing above and beneath them as they slice through the air. Because the ..read more

Adulteration means generally increasing the quality by adding some substances to the product.  If there is food that contains something poisonous or harmful that can be harmful to health, adulteration takes it away and make it worth eating. For example, Apple cider contaminated E.coli O157: H7 and Brie cheese poisoned by Listeria monocytogenes. Since turmeric and other spices are usually sold by weight, there is a possibility that powders of toxic, cheaper agents with a similar color may be added, such as lead (II, IV) oxide ("red lead"). These additives give turmeric an orange-red c ..read more

Computers have entered our lives both at home and at work and can be used for anything from helping with homework to landing a spacecraft. Over the years, there has been a vast increase in the amount of data computers can store – and the speed with which they handle it. The advances in the computer world have even led to virtual reality – a way of creating artificial situations – being used for entertainment or business. www.knnowledgedu.com Is that for real ?: Computers can sometimes fool our senses into thinking something is real using virtual reality (VR) systems. VR sends data ..read more

Some inventions make the world more fun to live in. entertainment and games such as fireworks and playing cards were invented centuries ago. The ancient Egyptian king Tutankhamun had toys buried with him inside his tomb. The ancient Greeks and Romans played with dolls and spinning tops. Other inventions, such as the rocking horse, date from the 1700s. More recently science has influenced the invention of toys with the use of pendulums and springs in toys such as the jack-in-the-box. Electricity, batteries, and computers have since revolutionized toy – making, which has lead to the creation ..read more

Creatures with hard shells as snails, oysters, mussels, and whelks belong to the huge animal group known as mollusks. However, some mollusks, including slugs and squid, have no outer shell at all. An unusual group of animals is the echinoderms, which includes starfish and sea urchins. They usually have a body shape that is radial, like a wheel with spokes, rather than two-sided with left and right, like other animals. There are also thousands of other types of strange-looking animals such as jellyfish and sponges. Mollusks phylum: www.knowledgedu.com Mollusks range from tiny slu ..read more

www.knowledgedu.com Rocky Mountains look solid and unchanging, then worn away by the weather, all the time build them. The world’s highest mountains actually formed quite recently in the Earth’s history. The Himalayas, for instance, built up in the last 40 million years, and are still growing, even today. The most ancient mountain ranges have long been worn flat or reduced to hills, such as New York’s Adirondacks, which are now over 1 billion years old. how are fold mountains formed ?: A few rocky mountains, such as Washington’s Mount St Helens, are volcanoes- tall cones becau ..read more