Kinetic Theory and Diffusion

arrangement of particles in states of matter 

Arrangment Of Particles (image/png)

changes of state 

freezing and melting - when a substance is heated, energy is being transferred to the particles of the substance, making them vibrate. the more the particles vibrate, the weaker the bonds between the particles become so the particles can move around more, detemining their new state.  - when a substance is cooled, particles loose energy which prevents them from vibrating. the less the particles vibrate the strong the bonds between them become and the less the particles are able to move so the substance would be close to a solid.when a substance goes from a liquid to  gas, it can go one of two ways ; boiling and evaporating How boiling is different to evaporating: boiling-  requires a certain temperature  requires heat  bubbles of gaseous particles are formed  occurs throughout entire substance  evaporation-  can occur at all temperatures  no bubbles are formed  occurs only at the surface of substance