CBSE Class X

PARAGRAPH ON POPULATION 1 (100 WORDS) Population refers to the number of people living in a particular area. The study of a population in terms of statistics pertaining to its size, composition and other parameters such as birth rate, death rate, growth rate as also ageing is known as demography. The size of a country’s population influences its social and economic condition. Population density is a parameter derived by dividing the population figure of a place by its area. A place with a smaller area would have a higher population density than one with a larger area if the population in the two places are equal.

    defin ition of nutrition? Nutrition is defined as the intake of food, considered in relation to the body's dietary needs. Good nutrition - an adequate, well balanced diet combined with regular physical activity - is a cornerstone of good health. Poor nutrition can lead to reduced immunity, increased susceptibility to disease, impaired physical and mental development, and reduced productivity. The diet of an organism is what it eats, which is largely determined by the availability, processing and palatability of foods. A healthy diet includes preparation of food and storage methods that preserve nutrients from oxidation, heat or leaching, and that redu ce risk of food-born illnesses. Eat Nutritiously Learning to eat nutritiously is not hard. The key is to: Drink lots of water. Go easy on the salt, sugar, alcohol, saturated fat and trans fat. Eat a variety of foods, including   fruits and vegetables , and whole-grain products. Eat lean meats, poult...

A computer is a general-purpose device that can be programmed to carry out a set of arithmetic or logical operations automatically. Since a sequence of operations can be readily changed, the computer can solve more than one kind of problem. Conventionally, a computer consists of at least one processing element, typically a central processing unit (CPU), and some form of memory . The processing element carries out arithmetic and logic operations, and a sequencing and control unit can change the order of operations in response to stored information. Peripheral devices allow information to be retrieved from an external source, and the result of operations saved and retrieved. Mechanical analog computers started appearing in first century and were later used in the medieval era for astronomical calculations. In World War II , mechanical analog computers were used for specialized military applications. During this time the first electronic digital computers were developed. Origina...