A state of matter is a class of materials, usually soli, liquid, and gas. Ionized Plasma, Quark-gluon plasma, Bose-Einstein condensate and fermionic condensate are other less commonly known states of matter. A state of matter is also referred to as a physical state and often erroneously described as a phase. There is a classic general science description of each of the phases: A solid is a material that maintains its shape and its volume; a liquid maintains its volume but takes on the shape of its container; A gas takes on both the shape and volume of its container. Bose-Einstein condensate and fermionic condensate are currently achievable at near absolute zero temperatures in laboratory settings. Both kinds of plasma are achieved at very high temperatures, and behave as gases. Quark-gluon plasmas exist at such high temperatures and pressures that they are unlikely to exist outside of laboratory conditions since shortly after the Big Bang.