Matches in DBpedia 2015-10 for { <http://dbpedia.org/resource/Matter> ?p ?o }
- Matter abstract "Before the 20th century, the term matter included ordinary matter composed of atoms and excluded other energy phenomena such as light or sound. This concept of matter may be generalized from atoms to include any objects having mass even when at rest, but this is ill-defined because an object's mass can arise from its (possibly massless) constituents' motion and interaction energies. Thus, matter does not have a universal definition, nor is it a fundamental concept in physics today. Matter is also used loosely as a general term for the substance that makes up all observable physical objects.All the objects from everyday life that we can bump into, touch or squeezeare composed of atoms. This atomic matter is in turn made up of interacting subatomic particles—usually a nucleus of protons and neutrons, and a cloud of orbiting electrons. Typically, science considers these composite particles matter because they have both rest mass and volume. By contrast, massless particles, such as photons, are not considered matter, because they have neither rest mass nor volume. However, not all particles with rest mass have a classical volume, since fundamental particles such as quarks and leptons (sometimes equated with matter) are considered "point particles" with no effective size or volume. Nevertheless, quarks and leptons together make up "ordinary matter", and their interactions contribute to the effective volume of the composite particles that make up ordinary matter.Matter commonly exists in four states (or phases): solid, liquid and gas, and plasma. However, advances in experimental techniques have revealed other previously theoretical phases, such as Bose–Einstein condensates and fermionic condensates. A focus on an elementary-particle view of matter also leads to new phases of matter, such as the quark–gluon plasma. For much of the history of the natural sciences people have contemplated the exact nature of matter. The idea that matter was built of discrete building blocks, the so-called particulate theory of matter, was first put forward by the Greek philosophers Leucippus (~490 BC) and Democritus (~470–380 BC).Matter should not be confused with mass, as the two are not quite the same in modern physics. For example, mass is a conserved quantity, which means that its value is unchanging through time, within closed systems. However, matter is not conserved in such systems, although this is not obvious in ordinary conditions on Earth, where matter is approximately conserved. Still, special relativity shows that matter may disappear by conversion into energy, even inside closed systems, and it can also be created from energy, within such systems. However, because mass (like energy) can neither be created nor destroyed, the quantity of mass and the quantity of energy remain the same during a transformation of matter (which represents a certain amount of energy) into non-material (i.e., non-matter) energy. This is also true in the reverse transformation of energy into matter.Different fields of science use the term matter in different, and sometimes incompatible, ways. Some of these ways are based on loose historical meanings, from a time when there was no reason to distinguish mass and matter. As such, there is no single universally agreed scientific meaning of the word "matter". Scientifically, the term "mass" is well-defined, but "matter" is not. Sometimes in the field of physics "matter" is simply equated with particles that exhibit rest mass (i.e., that cannot travel at the speed of light), such as quarks and leptons. However, in both physics and chemistry, matter exhibits both wave-like and particle-like properties, the so-called wave–particle duality.".
- Matter thumbnail Quartz_oisan.jpg?width=300.
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- Matter wikiPageExternalLink index.html.
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- Matter wikiPageWikiLink Aether_(classical_element).
- Matter wikiPageWikiLink Albert_Einstein.
- Matter wikiPageWikiLink Ambiplasma.
- Matter wikiPageWikiLink Anaximander.
- Matter wikiPageWikiLink Anaximenes_of_Miletus.
- Matter wikiPageWikiLink Annihilation.
- Matter wikiPageWikiLink Antielectron.
- Matter wikiPageWikiLink Antihydrogen.
- Matter wikiPageWikiLink Antimatter.
- Matter wikiPageWikiLink Antiparticle.
- Matter wikiPageWikiLink Apeiron_(cosmology).
- Matter wikiPageWikiLink Aristotle.
- Matter wikiPageWikiLink Astrophysics.
- Matter wikiPageWikiLink Asymmetry.
- Matter wikiPageWikiLink Atom.
- Matter wikiPageWikiLink Atomic_nucleus.
- Matter wikiPageWikiLink Atomic_theory.
- Matter wikiPageWikiLink Atomism.
- Matter wikiPageWikiLink Atoms.
- Matter wikiPageWikiLink Axion.
- Matter wikiPageWikiLink Baryogenesis.
- Matter wikiPageWikiLink Baryon.
- Matter wikiPageWikiLink Baryon_asymmetry.
- Matter wikiPageWikiLink Baryonic_particles.
- Matter wikiPageWikiLink Baryons.
- Matter wikiPageWikiLink Big_Bang.
- Matter wikiPageWikiLink Big_bang.
- Matter wikiPageWikiLink Binding_energy.
- Matter wikiPageWikiLink Black_hole.
- Matter wikiPageWikiLink Black_holes.
- Matter wikiPageWikiLink Bose–Einstein_condensate.
- Matter wikiPageWikiLink Bosonic_field.
- Matter wikiPageWikiLink Bottom_quark.
- Matter wikiPageWikiLink Bulk.
- Matter wikiPageWikiLink CP_symmetry.
- Matter wikiPageWikiLink CP_violation.
- Matter wikiPageWikiLink Category:Matter.
- Matter wikiPageWikiLink Charm_quark.
- Matter wikiPageWikiLink Chemical_compound.
- Matter wikiPageWikiLink Chemistry.
- Matter wikiPageWikiLink Classical_element.
- Matter wikiPageWikiLink Classical_physics.
- Matter wikiPageWikiLink Color_charge.
- Matter wikiPageWikiLink Color_superconductivity.
- Matter wikiPageWikiLink Color_superconductor.
- Matter wikiPageWikiLink Colour_charge.
- Matter wikiPageWikiLink Composite_particle.
- Matter wikiPageWikiLink Compound_(chemistry).
- Matter wikiPageWikiLink Condensed_matter_physics.
- Matter wikiPageWikiLink Conservation_of_mass.
- Matter wikiPageWikiLink Cosmic_ray.
- Matter wikiPageWikiLink Cosmological_constant.
- Matter wikiPageWikiLink Cosmology.
- Matter wikiPageWikiLink DNA.
- Matter wikiPageWikiLink Dark_energy.
- Matter wikiPageWikiLink Dark_matter.
- Matter wikiPageWikiLink Demarcation_problem.
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- Matter wikiPageWikiLink Density.
- Matter wikiPageWikiLink Deoxyribonucleic_acid.
- Matter wikiPageWikiLink Down_quark.
- Matter wikiPageWikiLink E=MC2.
- Matter wikiPageWikiLink Einstein.
- Matter wikiPageWikiLink Electric_charge.
- Matter wikiPageWikiLink Electrolyte.
- Matter wikiPageWikiLink Electromagnetic_field.
- Matter wikiPageWikiLink Electromagnetic_radiation.
- Matter wikiPageWikiLink Electromagnetism.
- Matter wikiPageWikiLink Electron.
- Matter wikiPageWikiLink Electron_neutrino.
- Matter wikiPageWikiLink Electrons.
- Matter wikiPageWikiLink Electronvolt.
- Matter wikiPageWikiLink Elementary_charge.
- Matter wikiPageWikiLink Elementary_particle.
- Matter wikiPageWikiLink Empedocles.
- Matter wikiPageWikiLink Energy.
- Matter wikiPageWikiLink Ernan_McMullin.
- Matter wikiPageWikiLink Excited_state.
- Matter wikiPageWikiLink Expansion_of_the_universe.
- Matter wikiPageWikiLink Femtometer.
- Matter wikiPageWikiLink Femtometre.
- Matter wikiPageWikiLink Fermi_energy.
- Matter wikiPageWikiLink Fermion.
- Matter wikiPageWikiLink Fermionic_condensate.