A sheltered place along a coast where boats dock safely
The top of a mountain
A channel built to carry water for irrigation or navigation
A line beyond which trees do not grow
A high landform with steep sides; higher than a hill
A huge sheet of ice that moves slowly across the land
An opening in Earth's surface through which hot rock and ash are forced out
A body of water completely surrounded by land
A smaller river that flows into a larger river
The starting point of a river
All the land that is drained by a river and its tributaries
A flow of water falling vertically
The place where a river empties into a larger body of water
A large body of salt water; oceans cover much of Earth's surface
A large area of nearly flat land
Land made of silt left behind as a river drains into a larger body of water
A row or chain of mountians
A stream of water that flows across the land and empties into another body of water
A narrow gap through a mountain range
A deep, narrow inlet of an ocean between high, steep clifs
A bowl shaped landform surrounded by higher land
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