| A | B |
|---|
| ocean | a large body of water |
| coral reef | ocean ridge made of skeletal remains of tiny animals |
| coast | an area of land near the ocean |
| peninsula | an area of land that sticks out into a lake or ocean |
| gulf | a large part of the ocean that extends into land |
| isthmus | a narrow piece of land that connects two larger land areas |
| delta | an area where a river deposits soil |
| island | land surrounded on all sides by water |
| strait | narrow body of water connecting two larger bodies of water |
| sinkhole | a circular depression formed when a cave collapses |
| river | a natural flow or water that runs through land |
| wetland | land covered by shallow water |
| lake | an inland body of water |
| forest | area of dense woods |
| volcano | an opening in the earth's crust where lava, ash and gases erupt |
| canyon | narrow valley with steep walls |
| glacier | large area of moving ice |
| mountain | rugged land rising higher than 2000 ft |
| hill | round elevated land smaller than a mountain |
| dune | hill of sand shaped by wind |
| plain | nearly flat area of land |
| desert | dry area with little water and few plants |
| oasis | area in desert with water source |
| valley | area of low land between hills or mountains |
| plateau | large elevated flat area of land |
