Materials in Our Daily Life
Materials in Our Daily Life : 95 :
21
Materials in Our Daily Life
The basic aim of science is not only to study and understand natural phenomena but also to use this knowledge to make our lives more comfortable. Science and technology have enabled us to develop more economical and convenient methods to recover useful materials from nature and to put them to various uses. Chemistry has enabled us to synthesize new materials which have desired properties, thus, making them even better than natural materials. We need different types of materials to meet our daily needs. Some of them are obtained from nature while others are prepared by man. The materials that we get from nature are called natural materials. Wood, silk, cotton, leather, rubber, coal, etc. are natural materials. However, some materials that we use are manmade. Synthetic textiles like terylene and nylon, cement, glass, plastics, dyes, soap, detergents, fertilizers, insecticides and pesticides are some man-made materials which are commonly used. In this lesson, you will learn about the ways in which various materials are used in making common household items, in construction of houses and other buildings. You will learn about different polymers and their uses in our daily life. In addition, you will learn about the various medicines that help to cure different diseases and keep us healthy. OBJECTIVES After completing this lesson, you will be able to: • differentiate between natural and man-made materials; • name the materials used for making some common household items and for housing purposes; • state the principles involved in preparation and properties of some man-made materials in our daily life; • list various medicines used in some common diseases; • explain harmful effects of man-made materials on the environment. 21.1 COMMON HOUSEHOLD ITEMS We use many things in our house like candles in case of emergency lighting, ink to write, soaps and detergents to wash our clothes, matchbox to light gas
21
Materials in Our Daily Life
The basic aim of science is not only to study and understand natural phenomena but also to use this knowledge to make our lives more comfortable. Science and technology have enabled us to develop more economical and convenient methods to recover useful materials from nature and to put them to various uses. Chemistry has enabled us to synthesize new materials which have desired properties, thus, making them even better than natural materials. We need different types of materials to meet our daily needs. Some of them are obtained from nature while others are prepared by man. The materials that we get from nature are called natural materials. Wood, silk, cotton, leather, rubber, coal, etc. are natural materials. However, some materials that we use are manmade. Synthetic textiles like terylene and nylon, cement, glass, plastics, dyes, soap, detergents, fertilizers, insecticides and pesticides are some man-made materials which are commonly used. In this lesson, you will learn about the ways in which various materials are used in making common household items, in construction of houses and other buildings. You will learn about different polymers and their uses in our daily life. In addition, you will learn about the various medicines that help to cure different diseases and keep us healthy. OBJECTIVES After completing this lesson, you will be able to: • differentiate between natural and man-made materials; • name the materials used for making some common household items and for housing purposes; • state the principles involved in preparation and properties of some man-made materials in our daily life; • list various medicines used in some common diseases; • explain harmful effects of man-made materials on the environment. 21.1 COMMON HOUSEHOLD ITEMS We use many things in our house like candles in case of emergency lighting, ink to write, soaps and detergents to wash our clothes, matchbox to light gas