CLASS 9th Science Matter in Our Surroundings notes
Study Material and Notes of Ch 1 Matter in Our Surrounding Class 9th Science Topics in the Chapter • Introduction • Physical Nature of Matter • Diffusion • Characteristics of Particles of Matter → Particles of matter have space between them → Particles of matter attract each other because of the force of attraction • States of Matter → Solid State → Liquid State → Gaseous State • Change of State of Matter • Effect of Temperature → Latent heat → Latent heat of fusion → Latent heat of vaporisation • Effect of change of pressure • Evaporation → Factors affecting the rate of evaporation → Evaporation causes cooling • Plasma • Bose-Einstein Condensate Introduction → Since early times human beings have been trying to understand their nature. Early Indian philosophers classified matter into five basic elements. The “Panch Tatva”– air, earth, fire, sky, and water. According to them, living as well as non-living things are made up of these elements. → Nowadays, scientists evolved to ...