Plasma is commonly called the fourth state of matter. This happens when it is very hot and very high pressure, like in the middle of a star. The atom kicks out some of its electrons and you get a jumble of charged particles.
Other forms are considered more “exotic” and only occur in special conditions, like very close to “absolute zero” (-273.15°C). Bose-Einstein Condensate is one of these. They’re pretty weird and since we don’t encounter them in day to day applications, they’re not taught in schools as people don’t *need* to know about them unless they’re doing science degrees.
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