| A | B |
|---|
| archipelago | a group of islands. |
| atoll | a broken ring-shaped coral island or string of islands surrounding a lagoon. |
| bay | part of an ocean, sea, or lake, extending into the land, usually smaller than a gulf |
| butte | a small, flat-topped hill, smaller than a mesa or plateau. |
| canal | a waterway built to carry water for navigation or irrigation |
| canyon | a steep sided valley. |
| cape | a projecting part of a coastline that extends into an ocean, sea, gulf, bay, or lake; smaller than a peninsula. |
| cliff | a high, steep face of rock or earth. |
| coast | the land along an ocean or sea. |
| delta | is land formed at the mouth of a river by deposits of silt, sand, and pebbles. |
| desert | an area with very little moisture where very few plants may grow. |
| equator | the imaginary line that divides Earth into the northern and southern hemispheres |
| fjord | a deep, narrow inlet of the sea between high, steep cliffs. |
| foothills | the lower hills found around mountainous ranges. |
| glacier | a gigantic mass of slow moving ice traveling over land. |
| gulf | part of an ocean or sea that extends into the land, usually larger than a bay. |
| island | a body of land completely surrounded by water |
| isthmus | a narrow strip of land, bordered by water on both sides, serving to connect two larger areas of land. |
| international date line | an imaginary line that is located at 180 degrees longitude. |
| mesa | a large, flat landform rising steeply above the surrounding land, smaller than a plateau and larger than a butte. |
| mountain range | a row or chain of mountains. |
| mouth | the place where a river empties into another body of water. |
| oasis | a place in the desert made fertile by a steady supply of water. |
| ocean | one of the earth’s four largest bodies of water. |
| peninsula | a large body of land surrounded by water on three sides; larger than a cape. |
| plain | a large area of flat or nearly flat land. |
| plateau | a high, flat landform rising steeply above the surrounding land, larger than a mesa and a butte. |
| prime meridian | the imaginary line that marks zero degrees longitude. |
| reef | a ridge of sand, rock, or coral that lies at or near the surface of a sea. |
| reservoir | a natural or artificial lake used to store water. |
| river basin | is all the land drained by a river and its tributaries |
| sea | a large body of salt water, smaller than an ocean. May be surrounded by land or be a part of an ocean. |
| source | the place where a river or stream begins. |
| strait | a narrow waterway or channel connecting two larger bodies of water. |
| valley | an area of low land between hills or mountains. |
| volcano | an opening in the earth through which lava, gas, and ash are forced out. |
| lagoon | a shallow body of water partly or completely enclosed within an atoll. |
| latitude | imaginary lines that run around the globe parallel to the equator. |
| longitude | imaginary lines that run around the globe parallel to the Prime Meridian. |
| mountain | a high, rounded or pointed landform with steep sides, higher than a hill. |
| river | a large stream of water that flows across the land and usually empties into a lake or ocean. |
| tributary | a river or stream that flows into a larger river or stream. |
