| A | B |
|---|
| plateau | large mostly flat area that rises above the surrounding land |
| isthmus | narrow strip of land that has water on both sides and joins two larger bodies of land |
| coral | rock-like substance formed from the skeletons of tiny sea animals |
| tributary | a stream that flows into a larger river or body of water |
| elevation | height of land above sea level |
| diversity | variety |
| hydroelectricity | electric power generated by flowing water |
| Amazon river | largest river |
| Lake Titicaca | highest lake in the world |
| Andes | mountains of western South America |
| Atacama Desert | desert in Chile |
| Central America | Honduras, El Salvador, Nicaragua, Costa Rica, Panama, Belize, Guatemala |
