S CREATIVE WRITER

Computer The computer is one of the most amazing inventions of man of this let century. In, this world, computer plays the vital role. It has covered almost all parts of human life. The credit of the invention of computer goes to Charges Babbage. So, he 18 called as the father of computer. Computér is an electronic device which receives input data, process them and gives meaningful output as r a result. It even stores a lot of mformation which can be u processed and analyzed through computer for many purposes. On the basis of size, computers are categorized into four classes,they are super computer, mainframe computer, mini computer, microcomputer. Computer is used widely because of its speed, accuracy and precision. It is used in industries for calculating income, expenditure and value of products Complicated calculations can be carried out accurately in a few seconds. It can process information very fast and more accurately.So it is widely used in schools, banks, railways,...

Global warming is the gradual warming of the Earth’s atmosphere. it has resulted In an Increase in the sea level. It has also led to changes in climatic conditions all over the world. Warming and cooling of the Earth’s atmosphere has been a natural phenomenon. It has occurred over the ages but the warming of the atmosphere in the last few decades had been faster than before. The atmospheric temperatures have gone up by three times the average for the 20th century since 1970. Global warming has been attributed to the increased emission at greenhouse gases. The increase in the amount of greenhouse gases has made Earth warmer than usual. It is also causing great problems tor the survival of planet Earth. Greenhouse gases Gases that contribute to global warming are known as greenhouse gases. Water vapour is the most abundant greenhouse gas, followed by carbon dioxide (CO), methane (CH 4), nitrous oxide (N20), halogenated fluorocarbons (HCFCs), ozone (O3), perfluorinated ca...

Bicycle Bicycles are vehicles with two wheels, a handlebar, and a seat. They do not have an engine and are propelled by foot pedals. They are the principal mode of transportation in many countries. Cycling is also a popular form of sport and leisure activity. Bicycles vary in shape, size, and use. They are used by people for many different purposes including recreation, exercise, and transportation. They are common throughout the world and especially in Chino, lndia,Brazil,ltoly, South Korea, Japan, Taiwan, and the United States. Cycling is also an Olympic sport. Early attempts Many attempts were made to invent the bicycle. The bicycle was not invented by one single person. In 1490, Leonardo Da Vinci made the first known drawing of a bicycle. Jean Teson invented a bicycle like vehicle in 1645 in France. It resembled a bicycle but was a four-wheeled machine. It had no brakes, pedals, or steering mechanism and needed foot movement. Celerifere Comte Mede de Sivrac, a F...

Microwaves Microwaves are electromagnetic radiations. They are used for generating heat and are also used for communications. Longer microwaves like those used in a microwave oven are used to cook food. Shorter microwaves are used in communication and weather forecasts. Microwaves, which are used for radars, are just a few centimetres long. Short and long microwaves Each wave has a certain shape and length .The distance between peaks or high points is called wavelength. Microwaves are of two basic types depending on their wavelengths-short and long microwaves. Short microwaves have short wavelengths that can be measured in centimetres, while the long microwaves have wavelengths of about a foot. Discovery The existence of microwaves was predicted by a Scottish scientist, James Clerk Maxwell, in 1864. His equations predicted the existence of microwaves. Twenty-four years later, in 1888, Heinrich Hertz demonstrated that Maxwell was right about the existence of microwa...

Solids,Liquids and Gases Matter can exist in different states. Solids, liquids, and gases are three common states of matter. Solids have fixed shape and volume. Rocks and woods are solids. Liquids have indefinite shape, usually determined by the containers they till. Water and milk are examples of liquids. Gases have no shape. Examples of gases are oxygen and nitrogen gas. Solids Solid is the densest state of matter. Solids can be made of elements or compounds They can also be made of mixtures, or combinations of diiferent elements and compounds. Most rocks are mixtures of many elements and compounds. The molecules of solids are very tightly bound and packed into regular shapes. There is a very little free space between the molecules and they cannot move.This gives solids their fixed shape and volume. Liquids Liquids are less dense than solids. The molecules of a liquid are not held together as strongly as in a solid. They can move around each other. This enables t...

Electricity Electricity is a form of energy. it is the movement of electrons or protons in a material. Electrons are negatively charged atomic particles, while protons are positively charged. Electrons in a conductor move from a negatively charged point to a positively charged point. Electricity is present everywhere in the world. Lightning is  Form of electricity produced by clouds. Even the human body contains weak electric signals that low in the nerve cells. Electricity can be changed into other forms of energy, such as  heat and light. it is used to produce light, heat, power, etc. Electric current Electric current is the flowing of charge through a wire. Charge can flow only through a conductor. Therefore, electricity can flow only through a conductor. There are two types of electric current-direct current and alternating current. Direct current flows only in one direction while alternating current reverses its direction at regular intervals. Electric ci...

Grand Canyon The Grand Canyon is one of the natural wonders of the world. It is a deep, wide gorge carved by the Colorado River in northern Arizona, United States. It is one of the most beautiful canyons of the world. Colorado plateau The Colorado Plateau is a large beautiful plateau in south-western United States. It  is characterised by horizontal, layered rocks, lava flows, deep canyons, barren, and dry lands. The climate is dry and arid and the area is. sparsely vegetated. The plateau covers an area of around 3,32,850 sq km and has an average elevation of 1,500 m. It includes areas drained by the Colorado River and its territories. The Grand Canyon section of thegplateau is the highest section of the Colorado Plateau. The Grand Canyon lies In the south-western portion of the Colorado Plateau. The mighty Colorado River has cut through the rocks of the Colorado Plateau lot about 6 million years forming the canyon. The canyon is 43.2 km long, 6.4 to 28.8 km wide, an...