Natural Wonders

4. A dense forest with high annual rainfall, typically found in tropical regions.
6. A fertile spot in a desert where water is found, often surrounded by vegetation.
7. A deep gorge, typically one with a river flowing through it, formed by erosion over millions of years.
11. A cascade of water falling from a height, formed when a river or stream flows over a precipice or steep incline.
14. A persistent body of dense ice that is constantly moving under its own weight.
15. A hot spring that intermittently sends up fountain-like jets of water and steam into the air.

1. A vast, flat, treeless Arctic region where the subsoil is permanently frozen.
2. A shallow body of water separated from a larger body of water by barrier islands or reefs.
3. A hard substance secreted by certain marine polyps for their support and habitation, forming reefs and atolls.
5. A grassy plain in tropical and subtropical regions, with few trees.
8. A group of islands closely scattered in a body of water.
9. A mountain or hill, typically conical, that emits lava, ash, and gases during an eruption.
10. A triangular tract of sediment deposited at the mouth of a river, typically where it diverges into several outlets.
12. A natural light display in the Earth's sky, predominantly seen in high-latitude regions.
13. A long, narrow inlet with steep sides or cliffs, created by glacial erosion.