Category: Define

Apogee – Definition

Apogee The point farthest from the earth on the moon’s orbit. This term can be applied to any other body orbiting the earth, such as

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Arid – Definition

Arid A term used for an extremely dry climate. The degree to which a climate lacks effective, life-promoting moisture. It is considered the opposite of

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Autumn – Definition

Autumn The season of the year which occurs as the sun approaches the winter solstice, and characterized by decreasing temperatures in the mid-latitudes. Customarily, this

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Ball Lightning – Definition

Ball Lightning A relatively rare form of lightning consisting of a luminous ball, often reddish in color, which moves rapidly along solid objects or remains

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Barometer – Definition

Barometer An instrument used to measure atmospheric pressure. Two examples are the aneroid barometer and the mercurial barometer. Atmospheric Pressure The pressure exerted by the

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Biosphere – Definition

Biosphere The transition zone between the earth and the atmosphere within which most terrestrial life forms are found. It is considered the outer portion of

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