General science

General science

A variety of science subjects concerning the fundamental knowledge about different aspects of our world and their underlying principles.

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General science

electromagnetic wave

Science; General science

A disturbance, produced by the acceleration or oscillation of an electric charge, which has the characteristic time and spatial relations associated with progressive wave motion. A system of ...

A diurnal, thermally driven circulation in which a surface convergence zone often exists between airstreams having over-water versus over-land histories. The sea breeze is one of the most frequently ...

rhombifera

Science; General science

A diverse class of extinct, marine, stalked echinoderms whose stratigraphic range extends from the Late Cambrian (505 MA) through Upper Devonian (360 MA). The class is named for rhombus-shaped ...

acanthodii

Science; General science

A diverse group of early jawed fishes from the Paleozoic Era, usually classified as a distinct class of vertebrates. Most acanthodians have tiny body scales with a cross section like that of an ...

coraciiformes

Science; General science

A diverse order of land birds found mainly in the tropics. The interrelationships of several families have been disputed, with no resolution. The closest affinities of the coraciiforms may be with ...

cnidaria

Science; General science

A diverse phylum of aquatic animals that are characterized by the possession of (1) intrinsic nematocysts, (2) a single body space that opens to the external medium, (3) radial or biradial symmetry, ...

archosauria

Science; General science

A diversified group of diapsid reptiles, comprising dinosaurs (and their descendants, birds), crocodylians, pterosaurs (flying reptiles), and various forms closely related to these groups. In the ...