A geographic area containing numerous geologically related mountains.
What is a mountain range?
100
A natural stream of water of fairly large size flowing in a definite course or channel or series of diverging and converging channels.
What is a river?
100
A body of water forming an indentation of the shoreline, larger than a cove but smaller than a gulf.
What is a bay
100
A region so arid because of little rainfall that it supports only sparse and widely spaced vegetation or no vegetation at all.
What is a desert?
100
The part of a river where the river flows into a larger river, a lake, a reservoir or an ocean.
What is a river mouth?
200
A mountain or hill, usually having a cuplike crater at the summit, formed around such a vent from the ash and lava expelled through it.
What is a volcano?
200
The beginning or place of origin of a stream or river.
What is a river source?
200
A narrow passage of water connecting two large bodies of water.
What is a strait?
200
One of the vast, nearly level, treeless plains of the arctic regions of Europe, Asia, and North America.
What is a tundra?
200
An artificial waterway for navigation, irrigation, etc.
What is a canal?
300
A piece of land jutting into the sea or some other large body of water.
What is a cape?
300
A tributary stream or any stream that is not a large river or a bayou.
What is a branch?
300
A ring-shaped coral reef or a string of closely spaced small coral islands, enclosing or nearly enclosing a shallow lagoon.
What is an atoll?
300
An area of land almost completely surrounded by water except for an isthmus connecting it with the mainland.
What is a peninsula?
300
A usually triangular mass of sediment, especially silt and sand, deposited at the mouth of a river.
What is a river delta?
400
A land area having a relatively level surface considerably raised above adjoining land on at least one side, and often cut by deep canyons.
What is a plateau?
400
An extended mass of ice formed from snow falling and accumulating over the years and moving very slowly.
What is a glacier?
400
An area of shallow water separated from the sea by low sandy dunes.
What is a lagoon?
400
A narrow strip of land, bordered on both sides by water, connecting two larger bodies of land.
What is an isthmus?
400
A small fertile or green area in a desert region, usually having a spring or well.
What is an oasis?
500
A large group or chain of islands, any large body of water with many islands.
What is an archipelago?
500
A stream that flows to a larger stream or other body of water.
What is a tributary?
500
A portion of an ocean or sea partly enclosed by land.
What is a gulf?
500
BONUS! A flat, sweeping landmass that generally does not change much in elevation.
What is a plain?
500
A part of a body of water along the shore deep enough for anchoring a ship and so situated with respect to coastal features, whether natural or artificial, as to provide protection from winds, waves, and currents.