Across
- 5. large stream
- 6. object has due to motion
- 8. sediment laid down
- 10. breaking down
- 13. where rivers collect their water
- 14. clay, sand, and silt
- 16. beneath topsoil
- 18. obstacles that force water to move
- 20. solid layer of rock
- 21. weathered material
Down
- 1. moves weathered material
- 2. plates move away
- 3. land jutting out like a finger
- 4. slow down downhill movement
- 7. top mantle and crust
- 9. grinding rock
- 11. ability to do work
- 12. Dark organic material
- 15. tiny air spaces in a rock
- 17. amount of sediment a river carries
- 19. favorite color