Some materials that we come across in our daily live are.
type names only
wood, metal, paper, fibre/fabric, plastic
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.