RELAXING

2. A natural pit, or sinkhole, resulting from the collapse of limestone bedrock.
3. A soft, boggy area of land that gives way underfoot.
4. A shallow, sediment-filled body of water formed by retreating glaciers or draining floodwaters.
6. The tidal mouth of a large river, where the tide meets the stream.
9. The coniferous forest biome characterized by long, cold winters and short, mild summers.
10. A piece of land almost surrounded by water or projecting out into a body of water.
11. An isolated flat-topped hill with steep sides, found in landscapes with horizontal strata.
14. A slow-moving mass or river of ice formed by the accumulation and compaction of snow
18. A group of islands clustered together in a sea or ocean.

1. A vast, flat, treeless Arctic region in which the subsoil is permanently frozen.
2. A type of cloud characterized by dense, white, fluffy accumulations.
5. A tree or shrub that grows in coastal saline or brackish water.
7. The highest point of a rock or mountain.
8. A ring-shaped coral reef, island, or series of islets.
10. A large, open area of grassland, especially in North America.
12. A long, deep, narrow body of water that reaches far inland.
13. A grassy plain in tropical and subtropical regions, with few trees.
15. A symbiotic association between a fungus and an alga or cyanobacterium.
16. A gentle, mild breeze
17. A large cactus species native to the Sonoran Desert in Arizona.