Across
- 4. variations of _____ can cause different types of soil
- 9. layer of soil that is different from soil above/below it
- 10. has greatest effect on soil
- 11. found in the drier western US in areas that have grass and bushes
- 12. produces regolith
Down
- 1. mostly made up of rock pieces
- 2. soil _______ is a tiny fraction of all Earth materials, yet a vital resource.
- 3. C horizon is made up of weathered _______
- 5. forms in areas that receive more than 63 cm of rain each year
- 6. forms in hot, wet tropical areas.
- 7. mixture of rock particles, minerals, decayed organic materials
- 8. mixture of humus and tiny rock pieces
- 9. decayed remains of organisms