Across
- 4. Organisms that break down wastes and dead organisms
- 6. Soil with about equal parts of clay, sand and silt
- 8. Grinding away of rock by rock particles
- 9. Loose layer of dead plant material on soil surface
- 11. Loose, weathered material in which plants can grow
- 12. Thick mass of gross roots and soil
Down
- 1. Processes that break down rock at Earth's surface
- 2. Solid layer of rock beneath soil
- 3. Topmost layer of soil
- 5. Organic material in soil
- 7. Layer of soil beneath the topsoil
- 10. Process of moving fragments of rock and soil