Across
- 4. matter, water, and air
- 9. all of the organisms that live in a region
- 11. material- the starting material of soil
- 13. weathering- when physical processes naturally
- 16. the physical, chemical, and biotic factors acting
- 18. the process of changing once living material
- 19. layers of soil formed from the movement of the
- 22. dark colored organic matter
- 24. matter- the remains of something that was once alive
Down
- 1. the shape and steepness of the landscape
- 2. rocks into smaller pieces
- 3. wedging- one of the most effective weathering processes-
- 5. weathering- change the materials that are part of
- 6. the mechanical and chemical processes that
- 7. objects on Earth's surface over time
- 8. small holes and spaces
- 10. the grinding away of a rock by friction or impact
- 12. a mixture of weathered rock, rock fragments, decayed
- 14. a community
- 15. of weathering
- 17. the average weather of an area
- 20. combines the element oxygen with other elements
- 21. molecules
- 23. called frost wedging