Across
- 2. a loose mixture of small mineral fragments
- 3. the removal of substances that can be dissolved from rock
- 5. a chemical reaction in which an element combines with oxygen to form an oxide
- 8. the organic material formed in soil from the decayed remains of plants and animals
- 9. changes a steep hill into a series of smaller, flatter fields or steps
Down
- 1. the top layer of soil
- 4. water located within the rocks below the Earth's surface
- 6. the average weather condition in an area over a long period of time
- 7. the layer of rock beneath the soil
- 8. horizontal soil layers