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Across 1. important for holding water and oxygen in soils 5. Earth system to do with water 10. This area of engineering is key to limiting earthquake damage. 12. where most of the earth's fresh water is stored 13. This layer is the living part of soil. 16. seeping process into the earth 17. a problem for soils which can be caused by over-irrigation 18. Gives soil its red colour 19. pollutant that can be deposited by rain 20. what we call the layers making up soil

Down 2. It's used to measure earth movement activity. 3. oxygen starvation in soils or water 4. Country where Bam was destroyed by an Earthquake 6. Associated with waste, toxicity, bad sanitation, irresponsible industry 7. Caribbean island much affected by volcanoes 8. This coastline saw the largest number of earthquake deaths. 9. If these are lax they can be blamed for disasters like earthquake damage. 11. smallest soil particles 14. non-living elements of an ecosystem 15. measurement of decrease in radioactivity of a substance