THE PARTICLE THEORY BY: ROSEMARY ISJOLA (DPSI) The Particle Theory of Matter The Properties of Matter and the particle theory There are three (3) states of matter and each one has its own special properties SOLIDS LIQUIDS GASES STATES OF MATTER When States of Matter Change • This type of change is a physical change and reversible • Examples are melting, freezing, evaporation, boiling, condensing, sublimation Melting: Solid changing into a liquid Freezing: Liquid changing into a solid Evaporation: Liquid changing into a gas Boiling Condensing: Gas changing into a liquid Sublimation: Solid changing into a gas Dissolving: Solids dissolves in a liquid Gas Pressure Atmospheric Pressure Diffusion: A process in which one substance spreads through another