Across
- 1. structure that is built over a river to control its flow
- 2. continent-sized slab that move slowly across the Earth's Surface
- 4. large mass of ice that moves over land and leaves distinctive features
- 6. the movement of weathered rock place to place
- 9. melted rock inside Earth
- 14. structure built at right angles to the beach to control beach erosion
- 15. the braking down of land/landforms
- 17. opening in Earth's crust that spews lava,ash and gases
- 19. a scientific theory that the earths crust is made up of moving plates
- 20. dropping of sediment or particles by water,wind and ice
- 22. small ridge of land used not let a body water overflow
Down
- 1. deposit of sediment in a river's mouth
- 3. layer beneath mantle believed to be made up of nickel and iron
- 5. building up of land/landforms
- 7. a crack in Earth's crust
- 8. mound of piled sand by wind
- 10. destructive force that breaks down rocks into smaller pieces
- 11. device that records vibrations in Earth
- 12. layer beneath crust, believed to be slightly molten and solid rock
- 13. The surface that makes the top of the lithosphere,includes continents and ocean floor
- 16. sand,silt and other small particles
- 18. system of drains that prevents flooding during rainstorms
- 21. a movement in Earth's crust
- 22. melted rock that reaches Earth's surface