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A bowl-shaped landform surrounded by higher land.
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Basin
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Part of an ocean or lake that extends deeply into the land.
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Bay
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A small, flat-topped hill; smaller than a mesa or plateau.
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Butte
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A channel built to carry water for irrigation or transportation.
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Canal
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A deep, narrow valley with steep sides.
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Canyon
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The land along an ocean.
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Coast
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A wall built across a river, creating a lake that stores water.
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Dam
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Land made of soil left behind as a river drains into a larger body of water.
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Delta
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A dry environment with few plants or animals.
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Desert
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A mound, hill, or ridge of sand heaped up by the wind.
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Dune
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A huge sheet of ice that moves slowly across the land.
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Glacier
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Part of an ocean that extends into the land; larger than a bay.
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Gulf
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A sheltered place along a coast where boats dock safely.
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Harbor
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A rounded, raised landform; not as high as a mountain.
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Hill
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A body of land completely surrounded by water.
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Island
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A narrow strip of land that connects two larger bodies of land.
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Isthmus
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A body of water completely surrounded by land.
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Lake
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A hill with as flat top; smaller than a plateau.
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Mesa
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A high landform with steep sides; higher than a hill.
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Mountain
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A narrow gap through a mountain range.
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Mountain Pass
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A row or chain of mountains.
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Mountain Range
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The place where a river empties into a larger body of water.
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Mouth
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A fertile area in a desert that is watered by a spring.
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Oasis
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A large body of salt water; oceans cover much of Earth's surface.
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Ocean
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The top of a mountain.
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Peak
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A body of land surrounded on three sides by water.
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Peninsula
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A large area of nearly flat land.
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Plain
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A high, flat area that rises steeply above the surrounding land.
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Plateau
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A place where ships load and unload their goods.
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Port
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A natural or artificial lake used to store water.
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Reservoir
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A stream of water that flows across the land and empties into another body of water.
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River
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All the land that is drained by a river and its tributaries.
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River Basin
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The starting point of a river.
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Source
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A narrow waterway that connects two larger bodies of water.
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Strait
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A line above which trees do not grow.
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Timberline
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A smaller river that flows into a larger river.
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Tributary
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An area of low land between hills or mountains.
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Valley
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An opening in Earth's surgace through which hot rock and ash are forced out.
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Volcano
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A flow of water falling vertically.
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Waterfall
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