This document discusses how coordinate systems using longitude and latitude can be used to locate places on Earth. Longitude lines run north-south and are used to locate west-east positions. Latitude lines run east-west and locate north-south positions. Key points include the Prime Meridian at 0 degrees longitude, the Equator at 0 degrees latitude, and the poles at 90 degrees latitude. Several activities are provided to practice identifying locations based on their longitude and latitude coordinates.