Across
- 3. Underground hollow often having an opening
- 6. A ring shaped island.
- 12. An area of a sea or ocean partially enclosed by land
- 14. A river or stream that flows into a larger river or stream
- 15. A land built up at a river's mouth
- 16. Land with tropical vegetation
- 18. A narrow piece of land that connects two large landmassess
- 19. Vast treeless plains with permafrost and small
- 21. A channel connecting two large bodies of water
- 24. Mountain formed when lava rises though the Earth's crust
Down
- 1. In deserts and on beaches
- 2. An artificial waterway used for travel
- 4. Lowland between moutain ranges
- 5. A long, wide body of water
- 7. Flat landmass higher than the surrounding land
- 8. Land surrounded by water on three sides
- 9. Hill that ries abruptly from surrounding ares
- 10. Land that rises above surrounding land
- 11. A large body of ice that moves across water
- 13. Glacial valley now filled by seawater
- 15. Waterless, and dry areas of land
- 17. A column of water and steam into the air
- 20. noticeably above the rest of the land
- 22. A body of water partially enclosed by land
- 23. Dense growth of trees