Across
- 1. Lava spewing mountain
- 6. Flat elevated landform
- 7. Large landmass
- 8. Dense wooded area
- 10. Earth's features and study
- 13. Molten rock beneath the surface
- 14. Earth's crust movements
- 15. Bowl-shaped cavity
- 16. Watercourse flowing to seas
- 18. Relating to earthquakes
- 20. Cold treeless biome
- 21. Lowland between mountains
Down
- 2. Vast bodies of saltwater
- 3. Gaseous layer surrounding Earth
- 4. Deep narrow gorge
- 5. Arid region with little rain
- 9. Slow-moving ice mass
- 11. Study of the Earth's structure
- 12. Inland bodies of water
- 15. Earth's outermost layer
- 17. Landmass surrounded by water
- 19. High landform with a peak