Portal:Science
From Wikipedia, the free encyclopedia
Wikipedia portals: Culture · Geography · Health · History · Mathematics · Natural sciences · Philosophy · Religion · Society · Technology
Science: 
History of science 
Philosophy of science 
Systems science 
Mathematics 
Biology 
Chemistry 
Physics 
Earth sciences 
Technology
| Main page | Categories & Main topics | Portals & WikiProjects | Things you can do |
Scientists maintain that scientific investigation must adhere to the scientific method, a rigorous process for properly developing and evaluating natural explanations for observable phenomena based on reliable empirical evidence and neutral, unbiased independent verification, and not on arguments from authority or popular preferences. Science therefore bypasses supernatural explanations, it instead only considers natural explanations that may be falsifiable.
Fields of science are distinguished as pure science or applied science. Pure science is principally involved with the discovery of new truths with little or no regard to their practical applications. Applied science is principally involved with the application of existing knowledge in new ways, including advances in technology.
Mathematics is the language in which scientific information is best presented, often it is the only way to formulate and present scientific knowledge. Therefore whether mathematics is a science in itself or the framework of science is a matter of perspective.
Most comets are believed to originate in a cloud (the Oort cloud) at large distances from the Sun consisting of debris left over from the condensation of the solar nebula; the outer edges of such nebulae are cool enough that water exists in a solid (rather than gaseous) state. Asteroids originate via a different process, but very old comets which have lost all their volatile materials may come to resemble asteroids.
Rust is the substance formed when iron compounds corrode in the presence of oxygen and water. It is a mixture of iron oxides and hydroxides. Rusting is a common term for corrosion, and usually corrosion of steel. Iron is found naturally in the ore haematite as iron oxide, and metallic iron tends to return to a similar state when exposed to air, (hydrogen, oxygen, nitrogen, etc.) and water. This corrosion is due to the oxidation reaction when iron metal returns to an energetically favourable state. Energy is given off when rust forms. The process of rusting can be summarized as three basic stages: The formation of iron(II) ions from the metal; the formation of hydroxide ions; and their reaction together, with the addition of oxygen, to create rust.
- ...that coloration is a property of loudspeakers that causes the speaker to continue to emit sound when an electrical signal stops?
- ...that light in a plasma display is created by phosphors excited by the ultraviolet radiation emitted by a plasma discharge between two flat panels of glass?
- ...that the Great Appalachian Storm of November 1950 led to wind gusts in excess of 100 mph/87 knots across NY, New Jersey, and New England?
- ...that the two human atria do not have valves at their inlets?
