Nature

1. A cascade of water falling from a height, often found in hilly or mountainous areas.
5. A vast body of saltwater that covers most of the Earth's surface.
8. A large landform that rises steeply above its surrounding area, usually rocky.
9. Natural underground hollows or passages, often formed by the action of water.
10. A deep, narrow valley with steep sides, often carved by a river.
11. A barren area of land characterized by little rainfall and sparse vegetation.

2. A meteorological phenomenon that forms a spectrum of light in the sky.
3. A large body of water surrounded by land, typically freshwater.
4. A large area covered chiefly with trees and undergrowth, often home to wildlife.
6. A mountain or hill with a vent through which lava, rock fragments, and gases erupt.
7. A natural flowing watercourse that typically empties into a larger body of water.
9. A visible mass of water droplets or ice crystals suspended in the atmosphere.