Weathering and Soil

2. the size, shape, and position of the particles of soil
3. the decaying organic matter in soil
6. the amount of open space between an object
9. the top layer of soil that contains humus
11. the process by which natural forces break down rocks and soil
12. breakdown of decomposition of rock that takes place when minerals change through chemical processes
15. the makeup of rock or soil describing the mineral or elements present in it
16. the ability to let water pass through
17. the process by which rainwater dissolves and carries away minerals and nutrients in topsoil
18. a soil layer with physical and chemical properties that differ from those of the soil layers above or below it

1. the process in which sediment is picked up and moved from one place to another
4. the breakdown of rock into smaller pieces of the same material without any change to its composition
5. the process in which transported sediment is laid down
7. the expansion of desert conditions in an area where the natural plant cover has been destroyed
8. a chemical reaction in which an element combines with oxygen to form an oxide;iron oxide= rust
10. the process of wearing something down by friction
13. the process in which layers or sheets of rock gradually break off
14. layer of rock beneath the soil