Across
- 4. the topsoil layer of soil
- 7. the starting material of soil consisting of rock or sediment that is subject to weathering
- 8. soil layers are called these
- 9. the remains of something that was once alive
- 12. the process of changing once-living material into dark-colored organic matter
- 14. the average weather of an area
- 16. small holes and spaces in soil
- 18. soil that is young, deep, and has few horizons is good for ________________________
- 19. a mixture of weathered rock, rock fragments, decayed organic matter, water, and air
Down
- 1. the shape and steepness of the landscape
- 2. describes how fast water enters a soil
- 3. the smallest soil particle
- 5. unweathered parent rock layer
- 6. the _______________ of soil ranges from boulder-sized pieces to very fine clay
- 10. all of the organisms that live in a region
- 11. these factors influence soil formation
- 13. the top layer of soil
- 14. partly weathered rock layer
- 15. soil can be described based on the ______________
- 17. soil formation is a constant and ____________ process