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

barley

Science; General science

A cereal grass plant whose seeds are useful to humans. It is grown in nearly all cultivated areas of the temperate parts of the world, and is an important crop in Europe, North and South America, ...

A chamber at the oral end of the vertebrate alimentary canal, leading to the esophagus. Because of divergent specializations in the various classes of vertebrates, it cannot be described in general ...

electric furnace

Science; General science

A chamber heated to high temperature by electricity. The furnace consists of a refractory shell to resist the high temperatures attained within the chamber and minimize the heat losses to the ...

water pollution

Science; General science

A change in the chemical, physical, biological, and radiological quality of water that is injurious to its existing, intended, or potential uses. (for example, boating, waterskiing, swimming, the ...

electromagnetic field

Science; General science

A changing magnetic field always produces an electric field, and conversely, a changing electric field always produces a magnetic field. This interaction of electric and magnetic forces gives rise ...

adaptation (biology)

Science; General science

A characteristic of an organism that makes it fit for its environment or for its particular way of life. For example, the Arctic fox ( Alopex lagopus ) is well adapted for living in a very cold ...

internal energy

Science; General science

A characteristic property of the state of a thermodynamic system, introduced in the first law of thermodynamics. For a static, closed system (no bulk motion, no transfer of matter across its ...