1. The document discusses latitude and longitude lines on Earth and how they are used to locate places. It provides details on the prime meridian, equator, tropics, polar circles and how to write latitude and longitude coordinates. 2. Methods for determining distances between locations and solving problems involving latitude, longitude, time zones and universal time are presented. 3. Information is given on sidereal and solar days, time zone conversions, and examples of solving problems involving time differences around the world.