Grids and time zones


    • Eratosthenes (195 BCE)- The first person to map the world, the only accurate part is the Mediterranean Sea
    • Longitude- is a geographic coordinate that specifies the east-west position of a point on Earth's surface
    • Longitude- is measured by imaginary lines circling the Earth and running through the poles, and used to measure distance and degrees east or west from the Prime Meridian
    • The Prime Meridian passes through Greenwich, England, and is given the position 0 degrees longitude

    • Longitude:
    1. Known as meridians
    2. north-south direction
    3. measure east-west of Prime Meridian 
    4. Farthest apart at Equator and meet at the poles
    5. equal in length
    6. Halves of great circles

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