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In common temperatures and pressures, atoms form the three classical states of matter: solid, liquid and gas. Complex molecules can also form various mesophases such as liquid crystals, which are intermediate between the liquid and solid phases. At high temperatures or strong electromagnetic fields atoms become ionized, forming plasma .
The term phase is sometimes used as a synonym for state of matter, but it is possible for a single compound to form different phases that are in the same state of matter. For example, ice is the solid state of water, but there are multiple phases of ice with different crystal structures , which are formed at different pressures and temperatures.
v. t. e. In the physical sciences, a phase is a region of material that is chemically uniform, physically distinct, and (often) mechanically separable. In a system consisting of ice and water in a glass jar, the ice cubes are one phase, the water is a second phase, and the humid air is a third phase over the ice and water.
Quark–gluon plasma ( QGP or quark soup) is an interacting localized assembly of quarks and gluons at thermal (local kinetic) and (close to) chemical (abundance) equilibrium. The word plasma signals that free color charges are allowed. In a 1987 summary, Léon Van Hove pointed out the equivalence of the three terms: quark gluon plasma, quark ...
t. e. Acculturation is a process of social, psychological, and cultural change that stems from the balancing of two cultures while adapting to the prevailing culture of the society. Acculturation is a process in which an individual adopts, acquires and adjusts to a new cultural environment as a result of being placed into a new culture, or when ...
Acculturation model. In second-language acquisition, the acculturation model is a theory proposed by John Schumann to describe the acquisition process of a second language (L2) by members of ethnic minorities [1] that typically include immigrants, migrant workers, or the children of such groups. [2] This acquisition process takes place in ...
Liquid crystal ( LC) is a state of matter whose properties are between those of conventional liquids and those of solid crystals. For example, a liquid crystal can flow like a liquid, but its molecules may be oriented in a common direction as in a solid. There are many types of LC phases, which can be distinguished by their optical properties ...
1929 – Paul Adrien Maurice Dirac and Werner Karl Heisenberg develop the quantum theory of ferromagnetism. 1932 – Louis Eugène Félix Néel discovers antiferromagnetism. 1933 – Walther Meissner and Robert Ochsenfeld discover perfect superconducting diamagnetism. 1933–1937 – Lev Davidovich Landau develops the Landau theory of phase ...