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2. List of states of matter - Wikipedia

   en.wikipedia.org/wiki/List_of_states_of_matter

   Metallic and insulating states of materials can be considered as different quantum phases of matter connected by a metal-insulator transition. Materials can be classified by the structure of their Fermi surface and zero-temperature dc conductivity as follows: [4] Metal: Fermi liquid: a metal with well-defined quasiparticle states at the Fermi ...

3. State of matter - Wikipedia

   en.wikipedia.org/wiki/State_of_matter

   In regular cold matter, quarks, fundamental particles of nuclear matter, are confined by the strong force into hadrons that consist of 2–4 quarks, such as protons and neutrons. Quark matter or quantum chromodynamical (QCD) matter is a group of phases where the strong force is overcome and quarks are deconfined and free to move.

4. Matter - Wikipedia

   en.wikipedia.org/wiki/Matter

   Its precise nature is currently a mystery, although its effects can reasonably be modeled by assigning matter-like properties such as energy density and pressure to the vacuum itself. [66] [67] Fully 70% of the matter density in the universe appears to be in the form of dark energy. Twenty-six percent is dark matter. Only 4% is ordinary matter.

5. Video lesson - Wikipedia

   en.wikipedia.org/wiki/Video_lesson

   The format may vary. It might be a video of a teacher speaking to the camera, photographs and text about the topic or some mixture of these. Animated video lessons, in particular, use engaging visuals and simplified explanations to help break down complex topics, making them especially effective in subjects like Science or Math. [1]

6. Physical property - Wikipedia

   en.wikipedia.org/wiki/Physical_property

   Properties may also be classified with respect to the directionality of their nature. For example, isotropic properties do not change with the direction of observation, and anisotropic properties do have spatial variance. It may be difficult to determine whether a given property is a material property or not.

7. Physical chemistry - Wikipedia

   en.wikipedia.org/wiki/Physical_chemistry

   Physical chemistry is the study of macroscopic and microscopic phenomena in chemical systems in terms of the principles, practices, and concepts of physics such as motion, energy, force, time, thermodynamics, quantum chemistry, statistical mechanics, analytical dynamics and chemical equilibria.