| A | B |
|---|
| latitude | horizontal imaginary lines that run from 0 degrees to 90 degrees north and south from the equator |
| longitude | vertical imaginary lines that run from 0 degrees to 180 degrees east and west of the Prime Meridian |
| Prime Meridian | name given to the 0 degree line of longitude |
| equator | name given to the 0 degree line of latitude |
| placemark | a symbol, such as a pushpin, in Google Earth that represents a specific place or item of interest |
| waypoint | a stored location in a GPS unit that is identified by a specific latitude, longitude, and elevation |
| compass rose | a tool that helps a user locate directions on a map |
| cardinal | one of the four major directions: north, south, east, west |
| time zone | one of 24 vertical divisions of the Earth based on when the sun strikes the surface; earliest time is in the east |
| contour line | line formed on a topographic map by connecting points of equal elevation |
| GPS | global positioning system; used commercially and by meteorologists and geologists |
| topographic map | map of Earth's surface focused on elevation |
| geologic map | map of Earth's surface focused on the composition and age of rock formations and other geologic features |
| contour interval | scale on a topographic map that indicates the elevation difference between contour lines for that map, with the innermost line being the highest elevation |
