Across
- 2. A dry, barren area with little rainfall
- 5. A cold, treeless region where the subsoil is permanently frozen
- 8. A steep face of rock or earth
- 9. A large body of salt water covering most of the Earth
- 11. Dense tropical forest
- 12. A fertile spot in a desert where water is found
- 13. A deep valley with steep sides, often carved by a river
- 14. A large area covered chiefly with trees and undergrowth
Down
- 1. Land completely surrounded by water
- 3. Water falling from a height, usually from a river
- 4. A slowly moving mass of ice
- 6. A natural elevation of the Earth's surface, taller than a hill
- 7. Large areas of flat or gently rolling land
- 10. A mountain that can erupt with lava, ash, and gases
- 15. A flowing body of freshwater that usually empties into a sea