Class8 Science Book Curiosity Chapter 7 QA
Chapter 7 – Particulate Nature of Matter VERY SHORT ANSWER (1 MARK) – IMPORTANT What is matter? Matter is anything that has mass and occupies space. What is meant by particulate nature of matter? Matter is made up of very tiny particles. Name the particles of matter. Atoms and molecules. Do particles of matter have space between them? Yes, particles of matter have spaces between them. Do particles of matter move? Yes, particles of matter are in constant motion. What happens to particles on heating? They move faster. Name the three states of matter. Solid, liquid and gas. SHORT ANSWER (2 MARKS) – IMPORTANT State two characteristics of particles of matter. Particles have spaces between them. Particles are in constant motion. Why does smell of perfume spread in a room? Due to diffusion of particles in air. What is diffusion? Diffusion is the intermixing of particles of one substance with another on their own. Why are solids rigid? Becau...