Soil Science

4. The process that breaks rock into smaller pieces
6. A layer of topsoil
7. The layer of living and non-living material on the surface of the Earth where plants grow
13. The amount of sand silt and clay in a soil
14. Farmers plow fields along the curves of the slope
15. A layer of bedrock
16. The removal of rock particles from their original location
17. A dark colored substance that forms from plant and animal decay
18. A layer of weathered bedrock
20. A layer of subsoil

1. Rock is physically broken into smaller pieces
2. A layer of organic material / humus
3. One of the three main ingredients in soil. This one is the smallest
5. A test used to determine how much clay there is in a soil. The longer the ribbon, the more clay is present
8. One of the three main ingredients in soil. This one is not the largest or the smallest
9. rotation Farmers plow their fields with a different crop each year to restore the soil's nutrients
10. A type of organism that breaks down the remains of dead organisms into usable energy
11. The breakdown of dead organisms into smaller pieces
12. One of the three main ingredients in soil. This one is the largest
13. A layer of soil with the same properties
19. Rock is broken by chemical changes