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Solids, Liquids and Gases .

Solids, Liquids and Gases . By Miss Buicke. What we must know from the syllabus :. OC1 N ame three states of matter and know their characteristics. All materials exist in one of three different forms: either solids, liquids or gases . These are known as the three states of matter.

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Solids, Liquids and Gases .

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  1. Solids, Liquids and Gases. By Miss Buicke.

  2. What we must know from the syllabus: OC1 Name three states of matter and know their characteristics.

  3. All materials exist in one of three different forms: either solids,liquidsor gases. These are known as the three states of matter. All matter is made up of particles (atoms or molecules) and these particles behave differently in solids, liquids and gases. Matter: Anything that occupies space and has mass

  4. Properties of the states of matter: Solids: The particles in a solid are closely packed into position. They can vibrate but do not move from their position. As a result solids keep their shape and volume. As the Particles are in fixed places, solids cannot flow and cannot be compressed.

  5. Liquids: The particles in liquids are close to each other but are free to over past each other. Liquids do have a definite volume, but will take the shape of whatever container they are placed in. They cannot be easily compressed or squashed.

  6. Gases: In gases the particles are free to move in all directions. They do not keep a definite shape or volume and always fill the container they are placed in. As the particles are very spread-out it is easy to compress them into a smaller volume.

  7. Particles in a solid • Definite shape • Definite volume • Cannot be compressed • Cannot flow • Particles in a liquid: • No definite shape • Definite volume • Cannot be compressed • Can flow

  8. Particles in a gas: • No definite shape • No definite volume • Can be compressed • Can flow

  9. In this diagram it is clear that solids and liquids can not be compressed but gases can be easily compressed.

  10. Changing of state: When solids are heated their particles gain energy and move apart. The particles then break free from their positions and the solid melts into a liquid. When a liquid is heated, the particles gain even more energy and break free from each Other. This is called boiling and the liquid turns into a gas. These changes of state are physical changes and there is no change in mass and no new substance is formed.

  11. Some important words we must know. Evaporation: The changing of a liquid to a gas. Condensation: The changing of a gas back into its liquid state.

  12. Diffusion: The movement of particles from an area of high concentration to an area of lower concentration. Diffusion occurs mainly in liquids and gases. Potassium manganate crystals Diffusing in water.

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