Across
- 2. decayed organic material in soil
- 4. a narrow shallow channel formed by water erosion on a slope
- 5. angular boulders that accumulate in a pile of a cliff or steep slope
- 8. the process by which one productive lands have become increasingly desert
- 10. the fracturing of rocks due to reduction of pressure
- 12. the removal of weathered materials from a place by agents
- 13. the chemical weathering of minerals by a reaction with water
Down
- 1. the dissolving of substances
- 3. a chemical reaction that occurs when atoms or ions lose electrons
- 6. water solution that contains an excess of hydrogen
- 7. a loose complex mixture of mineral grains on earth surface
- 9. the uppermost nutrient rich part of soil
- 11. a deep channel in sediment or soil caused by water erosion