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grid system click to hear : grid system

Collective term for the parallels and meridians that form an imaginary grid over the Earth’s surface, making it possible to locate a specific point.
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lines of longitude Western meridian prime meridian Eastern meridian lines of latitude Arctic Circle Equator Tropic of Capricorn parallel Tropic of Cancer Antarctic Circle

lines of longitude click to hear : lines of longitude

Coordinate of a point on the Earth’s surface indicating, in degrees, its distance from the prime meridian.

Western meridian click to hear : Western meridian

Imaginary line connecting the poles and perpendicular to the Equator; located west of the Greenwich meridian.

prime meridian click to hear : prime meridian

Chosen by convention as the meridian of origin; its longitude, 0, divides the Eastern and Western hemispheres.

Eastern meridian click to hear : Eastern meridian

Imaginary line connecting the poles and perpendicular to the Equator; located east of the Greenwich meridian.

lines of latitude click to hear : lines of latitude

Coordinate of a point on the Earth’s surface indicating, in degrees, its distance from the Equator.

Arctic Circle click to hear : Arctic Circle

Parallel of latitude 66°34' N; it marks the polar zone, where days and nights last 24 hours during solstices.

Equator click to hear : Equator

Imaginary line encircling the Earth at its greatest circumference and perpendicular to the polar axis; its latitude, 0, serves as a reference point for calculating other latitudes.

Tropic of Capricorn click to hear : Tropic of Capricorn

Parallel located at 23°26' S latitude (a distance of about 2,600 km from the Equator).

parallel click to hear : parallel

Imaginary circle whose plane is parallel to the Equator.

Tropic of Cancer click to hear : Tropic of Cancer

Parallel located at 23°26' N latitude (a distance of about 2,600 km from the Equator).

Antarctic Circle click to hear : Antarctic Circle

Parallel of latitude at 66°34' S that marks the polar zone, where days and nights last 24 hours during solstices.