Across
- 1. an underground layer of gravel, earth or porous rock that contains water?
- 2. the mineral matter of soil
- 3. Duration of weathering
- 5. The process of plants making their own food
- 7. The plants and animals that assist in creating soil
- 8. The hills and valleys of the ground
- 10. large soil particles (sand)
- 11. Very small soil particles
Down
- 1. Soil particle
- 4. an element contained in soil that is critical to the production of amino acids in plants
- 6. A rising or falling surface
- 9. The presence of oxygen in soil