1.2- understand the interconversions between the three states of matter

Melting: When you heat a solid, the energy provided by the heat source makes the particles vibrate faster than usual. Eventually, the particles vibrate so fast that the forces of attraction between the solid particles are no longer strong enough to hold them together; the particles are therefore allowed to move around one another (forms a liquid)

Freezing: When a liquid is cooled, the liquid particles with kinetic energy will move around more and more slowly. Eventually, they will be moving so slowly that the forces of attraction between them will hold them together in a fixed position to form a solid.

Boiling: Boiling occurs when a liquid is heated so strongly that the forces of attraction between the particles are overcome by the increased speed of the particles. The stronger the forces of attraction between particles, the higher the boiling point of a liquid, as more energy is needed to overcome the forces.

Condensing: When a gas is cooled, the particles will move slow enough so that the forces of attraction between them will hold them as a liquid.

Sublimation: A small number of solids (e.g. carbon dioxide) have the ability to change directly from solid to gas when heated. The reverse of this process is known as deposition