MapsAltitude: height above sea water Compass: magnetic needle pointing north that helps to find direction Globe: spherical model of the earth showing physical features Isobar: line on the map joining places of equal atmospheric pressure Isotherm: line on the map joining places of equal temperature Legend: key to a map Longitude: east/west position of place measured in degrees from 0 to 180 along equator with reference to the prime meridian passing through Greenwich in London Meridian: imaginary semi circular line joining two poles and perpendicular to the equator Nadir: point on the celestial sphere opposite to the zenith and directly below the observer Parallel: line of latitude parallel to the equator Tropics: area of earth closest to the equator between the tropic of Cancer and the tropic of Capricorn Zenith: point directly above the head of the observer | ||||||
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