Matter in Our Surroundings, class 9, chapter 1
Matter in Our Surroundings Early Indian philosopher classified matter into five basic elements. The” panch tatva”- air, earth, fire, sky and water. According to them, livings as well as non living thing are made up of these elements. Matter: anything which occupy space, have mass and can be felt by any of our senses is called matter. Everything that we can touch, see, hear, taste and also smell is matter. Physical Nature of Matter A physical property is that aspect of the matter that can be observed or measured without changing its nature or composition. It is independent of the amount of matter present. Physical properties include appearance, colour, odour, density, texture, melting point, boiling point, solubility, etc. 1. Particles of matter have spaces between them This characteristic is one of the concepts behind the solubility of a substance in other substances. For example, on dissolving sugar in water, the