Evidence for the Particulate Nature of Matter

Evidence to show that matter exists in the form of particles:

1. Diffusion: Movement of fluid (Liquids and gases from a region of higher concentration to a region of lower concentration). e.g. a perfume released in a section of a room can be smelt across the room. This is because the perfume particles have moved from one point to another in the room.

2. Dissolution of Solid in Liquid: When a cube of sugar is dissolved in water, the sugar breaks into its particles which spread within the liquid.

3. Osmosis: Movement of water molecules from a more dilute solution to a more concentrated solution through a semi-permeable membraneA semipermeable membrane is a layer that only certain molecules can pass through. Smaller molecules like water can pass but not the bigger molecules like solutes. It allows cells to keep... More. For example, if you put beans in a glass of water, the beans will swell after some days. This shows the molecules of water are made up of tiny particles which move through the semi-permeable skin into the beans.