Across
- 3. land collapse due to void underneath
- 4. scratches and scrapes in bedrock caused by moving ice
- 6. hill made of wind blown sand
- 7. flowing water down a narrow apace
- 10. river that drops sand and sediment at the end of a lake or ocean
- 11. a valley between two steep walls
- 12. an overflow of water onto land
- 14. flat piece of land raised up with steep sides
- 16. land surrounded by water on 3 sides
- 17. a lowland area between mountains with gently sloping sides
- 19. land surrounded by water
Down
- 1. spring water that comes out of the ground
- 2. opening which vents lava, gasses and ash
- 5. fast movement of earth down a slope
- 8. giant hill with steep sides
- 9. an overflow of water on dry land
- 11. an underground cavern
- 13. tectonic trembling(shaking) of earth
- 15. body of water that empties into a lake or ocean
- 16. flat area of land
- 18. a natural mound
- 20. body of water completely surrounded by land