| A | B |
|---|
| UNESCO | United Nations Economic, Scientific and Cultural Organization |
| Taiga | Forest of the subarctic region |
| Elevation | Height of any land surface above sea level |
| Prairie | Grassland region of North America |
| Deciduous | Losing its leaves in the winter |
| Wadi | Bed of a stream |
| Estuary | Part of a river where the sea tide flows in |
| Delta | Fan-shaped deposit of mud and sand |
