| A | B |
|---|
| delta | a flat, low lying plain formed at the mouth of a river when sediment is deposited by flowing water |
| plain | flat or gently rolling area |
| mountains | a high relief, rising at least 2,000 feet above the surrounding terrain |
| isthmus | a narrow strip of land having water on each side and joining two large bodies of land |
| peninsula | a portion of land nearly surrounded by water; a piece of land jutting out into the water |
| island | an area of land surrounded by water and is smaller than a continent |
| archipelago | group of islands |
| tributary | a river or strea that flows into a main river |
| strait | a narrow passageway connecting two bodies of water |
| plateau | a raised area of mostly level land with at least one side that rises steeply above the surrounding land |
| river | natural stream or water larger than a brook or creek |
| moraine | mass of rock, gravel, sand, and clay carried and deposited by glaciers |
| butte | an isolated hill or moutain with steep sides |
| basin | a hollow area or enclosed place containing water (the land drained by a river and its branches) |
| glaciers | slow-moving mass of snow or ice, formed over many years from layers of unmelted snow |
| lake | body of water surrounded by land |
| volcano | a hole in the earth from which molten rock, steam and ashes are thrown up |
| flood plain | a plain along a river, formed from sediments by floods |
