| A | B |
| landforms | masses of land, such as continents, islands, and peninsulas |
| delta | the name given to soil deposited at the mouth of a river |
| gulf | a large area of sea or ocean that is partially enclosed and is larger than a bay |
| bay | an inlet of the sea or other body of water that is smaller than a gulf |
| lake | a body of fresh water that is completely surrounded by land |
| source | the name of the place where a river begins |
| mouth | the name of the place where a river empties into a larger body of water |
| tributary | a river or stream that flows into a main river |
| mountain range | a row of connected mountains |
| plains | a large area of level, or nearly level, land on Earth's surface |
| cape | a point or extension of land jutting into the water that is usually smaller or thinner than a peninsula |
| peninsula | a portion of land that is nearly surrounded by water and is connected with a larger body of land |
| island | a body of land that is smaller than a continent and is surrounded by water |
| valley | a low area between ranges of mountains or hills |
| sea | a large body of salt water that is smaller than an ocean |