weathering and erosion

6. the things that move weathered material
7. those that destroy or tear down existing formations
10. occurs when rocks are broken up into smaller pieces without changing the chemical makeup
13. individual rock fragments which have been weathered due to frost heaving
14. a naturally formed acid which forms when water dissolves atmospheric carbon dioxide
17. the downslope movement of material
19. a mineral which is susceptible to chemical weathering where water is present
21. the fracture of rock due to the growth of salt crystals

1. caused by the expansion of freezing water in cracks
2. occurs when rocks are removed and the underlying rocks expand
3. a mafic intrusive rock which is susceptible to oxidation
4. the breakdown of rocks which changes the chemical composition of the rock
5. tree roots can buckle sidewalks by this kind of mechanical weathering
8. a type of chemical weathering which occurs when rocks that contain iron are weathered
9. those that work to create or build new geologic formations
11. a chemical reaction that changes feldspar into clay
12. a tough durable mineral hardness of 7 and no cleavage
15. when a rock is broken up into smaller pieces compared to when it is whole the surface area _____
16. the force which is the cause for mass wasting
18. occurs when a lithospheric plate dives down under another plate
20. the most important agent of chemical weathering