Soil - Crossword Labs

4. layer of rock beneath the soil
6. horizon a soil layer with physical and chemical properties that differ from those of the soil layers above or below it
9. weathering the breakdown of rock into smaller pieces of the same material without any change to its composition
12. the process in which layers or sheets of rock gradually break off
14. the expansion of desert conditions in an area where the natural plant cover has been destroyed
16. the decaying organic matter in soil
17. the amount of open space between an object

1. the size, shape, and position of the particles of soil
2. weathering breakdown or decomposition of rock that takes place when minerals change through chemical processes
3. the top layer of soil that contains humus
5. a chemical reaction in which an element combines with oxygen to form an oxide; iron oxide = rust
7. the process by which natural forces break down rocks and soil
8. the ability to let water pass through
10. the makeup of rock or soil describing the minerals or elements present in it
11. the process of wearing something down by friction
13. the process by which rainwater dissolves and carries away minerals and nutrients in topsoil
14. the process in which transported sediment is laid down
15. the process in which sediment is picked up and moved from one place to another