Solid --melts-> Liquid --evaporates-> Gas --condenses-> Liquid --solidifies-> Solid
Solids:
- Strong forces of attraction between particles with little energy and very small vibrations.
- Fixed in a regular arrangement.
Liquids:
- Weaker attractions with more energy and random movements at a low speed.
- Close but moving particles, arranged irregularly.
Gases:
- No attractions between particles.
- High energy, random movements at high speeds.
Evaporation --> Particles escape from liquid to gas. They have to be moving near to the surface of the liquid at a high speed and in the right direction (enough kinetic energy).
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