| A | B |
|---|
| plateau | An area of elevated flat land |
| dam | A wall built across a river, creating a lake that stores water |
| dune | A mound, hill, or ridge of sand heaped up by the wind |
| desert | a dry environment with few plants and animals |
| isthmus | a narrow strip of land that connects two larger bodies of land |
| peninsula | a body of land nearly surrounded by water |
| bay | part of an ocean or lake that extends deeply into the land |
| valley | an area of low land between hills or mountains |
| hill | a rounded, raised landform; not as high as a mountain |
| canyon | a deep, narrow valley with steep sides |
| reservoir | a natural or artificial lake used to store water |
| gulf | part of an ocean that extends into the land; larger than a bay |
| strait | a narrow water-way that connects two larger bodies of water |
| mesa | a hill with a flat top; smaller than a plateau |
| butte | a small, flat-topped hill; smaller than a mesa or plateau |
| coast | the land along an ocean |
| island | a body of land completely surrounded by water |
| harbor | a sheltered place along a coast where boats dock safely |
| peak | the top of a mountain |
| mountain | a high landform with steep sides; higher than a hill |
| volcano | an opening in Earth's surface through which hot rock and ash are forced out |
| canal | a channel built to carry water for irrigation or navigation |
| glacier | a huge sheet of ice that moves slowly across the land |
| lake | a body of water completely surrounded by land |
| port | a place where ships load and unload their goods |
| timberline | a line beyond which trees do not grow |
| tributary | a smaller river that flows into a larger river |
| source | the starting point of a river |
| river basin | all the land that is drained by a river and its tributaries |
| waterfall | a flow of water falling vertically |
| plain | a large area of nearly flat land |
| delta | land made of silt left behind as a river drains into a larger body of water |
| river | a stream of water that flows across the land and empties into another body of water |
| mountain range | a row or chain of mountains |
| basin | a bowl-shaped landform surrounded by higher land |
| mountain pass | a narrow gap through a mountain range |
| mouth | the place where a river empties into a larger body of water |
| ocean | a large body of salt water; oceans cover much of Earth's surface |
