A zone is an area separated from other areas in some artificial or natural manner. Many different types and sizes of zones exist.Twenty-four artificially defined time zones help standardize timekeeping worldwide. The time zones are based on the official time in Greenwich, England—called Greenwich Mean Time—and may follow natural or political borders in different parts of the world.The world is sometimes divided into five zones according to latitude. The tropical, or Torrid Zone, lies near the Equator and extends to the Tropic of Cancer in the north and the Tropic of Capricorn in the south. The north and south frigid zones (also known as the Arctic and the Antarctic) lie near the poles. In between them lie the north and south temperatezones.Altitudinal zones are naturally defined. They arise because temperatures and moisture levels change drastically at different altitudes. As a result, vegetation or certain species of animals can only flourish in their specific zones.When two regions a...
