2. Latitude and Longitude Angular measurements used to locate positions on the earth’s surface Reference line- Line which serves as a starting point for measurement. Equator- reference line for latitude 0 O. Prime meridian- reference line for longitude 0 O.

3. Latitude Measurement north and south of the equator Parallels- imaginary lines that connect equal values of latitude. Greatest latitude is 90 0 (North & South pole)

4. Labeled and used like the Y-axis on a graph Must always have a label N or S designating the location north or south of the equator. Based on the position of Polaris (North star).

5. Longitude Measurement east and west of the prime meridian. Meridians- imaginary lines that connect equal values of longitude. All meet at the north & south geographic poles Greatest longitude is 180 (international date line). Labeled and used like the X-axis on a graph. Must always have a label E or W designating the location east or west of the prime meridian. Based on the position of the sun.

6. Distance One degree of latitude or longitude is just over 69 miles. At 45 degrees N or S of the equator, one degree of longitude is about 49 miles.