Across
- 3. Land masses that make all land on Earth
- 5. Sloped sandy shoreline
- 8. Barren wind-blasted and sandy lowland
- 9. A narrow valley with steep rocky sides
- 13. Lowland between two hills or mountains
- 17. A body of freshwater that runs over land
- 18. When water flows over an edge like a cliff
- 19. A group of small islands
- 20. Large body of saltwater surrounded by land
Down
- 1. A hollow mountain that can erupt
- 2. Area of a river that has strong currents
- 4. A smaller river that flows into a larger river
- 6. The oceanic currents dictated by the moon
- 7. A very narrow rocky canyon
- 10. A hollow rock formation
- 11. A tall rocky formation with steep sides
- 12. A man-made water way
- 14. Large semi-dry flat area with mostly grass
- 15. Lowland with slow moving swampy water
- 16. A steep cliff overlooking water
- 20. Constantly wet lowland with trees
