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**MERIDIANS AND PARALLELS**

A series of imaginary vertical and horizontal lines enables us to identify the exact location of places on Earth.

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**Meridians are semicircles which go from one pole to the other**

Meridians are semicircles which go from one pole to the other. The prime meridian, or Greenwich meridian (0º), is the point of reference for other meridians.

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**Parallels are circles which are perpendicular to the meridians**

Parallels are circles which are perpendicular to the meridians. The equator is the most important parallel and is the point of reference for the other parallels.

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**Other important parallels, from north to south, are:**

The Arctic Circle

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Latitude and longitude indicate geographical coordinates: the exact location of a place on the Earth.

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**They are lalitude north (N) or south (S).**

Latitude is measured by using the parallels which start at the equator (0º). At the poles they are 90º They are lalitude north (N) or south (S).

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**They run vertically from 0º to 180º to the west (W)… **

Longitude is measured by using the meridians which start at the prime meridian (0º). …and 0º to 180º to the east (E).

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How can you find an exact location of a place?

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