Want to know what an aclinic line or natural bridge is? Discover some of the most common terms used in study of geography.
Depending on who you ask, urban sprawl is either the best thing that ever happened to growing families -- or the downfall of civilization and the environment as we know it. Learn about the history and consequences of this American phenomenon. See more »
Tundra, a treeless region located in the Arctic or at high altitudes. Tundra occurring in the Arctic is known as arctic tundra, that at high altitudes is called alpine tundra.
See more »Valley, an elongated depression between bluffs, hills, or mountains. Small valleys surrounded by hills are often called hollows, glens, dales, or dells.
See more »Waterfall, or Cataract, a stream of water that falls in one or more steep descents.
See more »Whirlpool, a circular current of water with a depression in its center into which objects may be drawn and sucked down.
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