Climate of United States:
- mostly temperate, but tropical in Hawaii and Florida, arctic in Alaska, semiarid in the great plains west of the Mississippi River, and arid in the Great Basin of the southwest
- low winter temperatures in the northwest are ameliorated occasionally in January and February by warm chinook winds from the eastern slopes of the Rocky Mountains
Terrain of United States:
- vast central plain, mountains in west, hills and low mountains in east
- rugged mountains and broad river valleys in Alaska
- rugged, volcanic topography in Hawaii
United States also has such useful resources as: coal, copper, lead, molybdenum, phosphates, rare earth elements, uranium, bauxite, gold, iron, mercury, nickel, potash, silver, tungsten, zinc, petroleum, natural gas, timber.