Unusual states of matter

 Some substances exist in states that do not comply with the normal definitions of a gas, a liquid, or a solid. For example, jelly is neither a true solid nor a liquid, and smoke is neither a pure gas nor a solid. Matter in stars and in the tails of comets exists as a plasma, a mixture of charged particles that is outside the normal definition of a gas. In general, a plasma can exist only at extremely high temperatures. At extremely low temperatures, approaching absolute zero, some materials take on remarkable properties. Although they are strictly not different states of matter, their exceptional behavior is also described in this article.

Mist is an unusual state of matter, despite being a familiar phenomenon. It is a colloid in which the dispersion medium is a gas (air) and the disperse phase is a liquid (water droplets). In physical terms, fog and cloud are similar types of colloids.

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