Weathering and Soil

3. The soil layer that contains weathered rock
5. Oxidation is a chemical reaction in which a substance combines with _____.
6. The most common agent transporting sediment is ______ water
9. Fertility is the ability of soil to _______ agricultural plant growth
11. Rocks that are broken down and their composition changes through this process
13. Sediment are small, solid pieces of material from rocks or _________.
15. The type of weathering favored by cold climates
16. Bedrock is a layer of solid rock found beneath the ______
17. Abrasion is the process of rocks and particles scraping against one another, ________ away their surfaces
18. Soil is classified into how many major orders?

1. The top layer of soil, rich in organic material
2. The idea that Earth’s features have formed gradually by _____ processes that are still occurring.
3. The soil layer that undergoes the most change and no longer resembles parent material
4. The principle that chemical reactions occur faster at higher ______
7. The breakdown of rocks into smaller particles by natural processes
8. The vertical section of soil that ranges from the surface to the bedrock
9. The medium-sized soil particles that retain water
10. Humus is the dark, highly _______ organic matter in soil
12. Mechanical weathering is the physical breakdown of rocks without changing their ______ composition
14. Erosion is the process by which _______ of rock are loosened and carried away