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Small tropical islands and reefs that encircle shallow pools of seawater called lagoons.
Atoll
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A group of islands clustered together in an open expanse of sea or ocean.
Archipelago
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Rocky wasteland that has been carved by erosion into intricate and fantastic shapes.
Badland
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A small area of sea or lake partly enclosed by dry land.
Bay
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The sandy or rocky land at the edge of an ocean, sea, or lake.
Beach
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An isolated, rocky hill or mountain with a small flat top.
Butte
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A deep, narrow valley with steep, rocky sides.
Canyon
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A pointed piece of land that projects from a coastline.
Cape
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A hollow underground chamber, usually one with an opening in the side of a hill or mountain.
Cave
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A sheer, steep face of rock or earth
Cliff
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One of the seven great masses of land on Earth
Continent
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Long mountain ridgelines that determine the directions a continent's rivers will flow.
Continental Divide
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A shallow underwater plain that is the real outer edge of a continent.
Continental Shelf
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A deep crack in either the ice on top of a glacier or the ground after an earthquake.
Crevasse
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A fan-shaped deposit of mud and sand, often green with vegatation, found at the mouths of many rivers.
Delta
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A very dry and desolate land that receives little or no rainfall.
Desert
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A mound or ridge of loose sand shaped by blowing winds.
Dune
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A long, narrow inlet of the sea between tall, rocky cliffs.
Fjord
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A shallow place in a stream where people and animals can safely wade from one bank to the other.
Ford
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A region thickly covered with trees and abundant underbrush.
Forest
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A naturally hot, or geothermal, spring that shoots scalding water and steam high into the air.
Geyser
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A great mass of ice slowly sliding down a mountain slope or through a valley.
Glacier
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A vast open plain covered with natural or planted grasses
Grassland
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A small, narrow, rocky ravine.
Gulch
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A large inlet of ocean or sea that is partially surrounded by land.
Gulf
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The area where a river originates and begins its journey to the sea.
Headwater or Source
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A mountainous or hilly region that stand above the surrounding landscape.
Highland
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An elevated, rounded point of land that is lower and smaller than a mountain.
Hill
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A large chunk of floating ice that has broken off, or calved, froma glacier.
Iceberg
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A piece of land that is smaller than a continent and completely surrounded by water.
Island
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A narrow strip of land that does two things: 1) it connects two much larger areas of land, and 2) it narrowly separates two large bodies of water.
Isthmus
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A hot, humid, tropical rain forest.
Jungle
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A very small, low, offshore island or reef.
Key
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A large inland body of water.
Lake
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A low, spongy wetland covered with thick, healthy growths of tall grasses and reeds.
Marsh
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A bend in the winding, looping course of many lowland rivers.
Meander
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A rugged, upthrust mass of rock that looms high above the surrounding land.
Mountain
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An opening or gap in a mountain range that serves as a path or road across the mountain.
Mountain Pass
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A long, connected chain of mountains and hills.
Mountain Range
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The place where a stream flows into a larger body of water.
Mouth
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1) The entire body of salt water that covers nearly 3/4 of the earth's surface. 2) Any one of the five separate oceans: the Atlantic, Pacific, Indian, Arctic or Antarctic.
Ocean
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A massive mountain range lying at the bottom of an ocean or sea.
Ocean Ridge
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A bold line of high, steep cliffs.
Palisade
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A large piece of land that juts far out into the water and is almost surrounded by water.
Peninsula
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A broad region of flat or gently rolling, treeless land.
Plain
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A large highland plain that rises sharply above the surroundling land.
Plateau
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A high, prominent point on a rocky coastline.
Promontory or Headland
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A stretch of stream or river where the fast-moving current crashes against the rocks and boulders in its path.
Rapids
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A narrow chain of rock, sand, or coral lurking just below tor just above the water.
Reef
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A long, large stream.
River
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An underwater ridge of sand built up by tides and currents.
Sandbank or Sandbar
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A large body of salt water that is smaller than an ocean
Sea
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A hollow chamber eaten into a coastal cliff by the pounding power of crashing waves.
Sea Cave
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An underwater mountain.
Seamount
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A long, broad ocean inlet that is roughly parallel to the coast.
Sound
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A narrow waterway that connects two larger bodies of water.
Strait
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A body of flowing water.
Stream
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A huge, treeless plain bordering the Arctic Ocean
Tundra
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A gently slping depression between hills or mountains.
Valley
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An opening or vent in the earth's crust through which ashes, hot gases, and lava erupt.
Volcano
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A stream that flows over the edge of a cliff.
Waterfall
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A broad belt of climate and geography that encircles the earth.
Zone (Tropical, Temperate, & Polar)
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