| Flap 1 | Flap 2 |
| hydroelectricity | using water to produce electricity |
| diversify | to add variety |
| El Nino | warm ocean current that flows along the western coast of South America; affects weather patterns |
| elevation | height of land above sea level |
| plateau | large, raised area of mostly level land |
| isthmus | narrow strip of land that has water on both sides; joins two larger bodies of land |
| coral | rock-like substance formed of skeletons of tiny sea animals |
| pampas | regions of plains in Argentina, Uruguay, and Brazil |
| tributary | river or stream that flows into a larger river |
