Chapter 2

7. Movement of weathered rock and soil by the process of elements is called____________
8. rotation Too plant crops each year to maintain fertility is called__________
9. Remains that are broken down by other organisms is called__________
11. Contour A Heavy contour line and a elevated contour line labeled in round units on a topographic map__________
12. Map Features of an area that shows surface on a map is called________
14. Dead plant leaves and stems on the surface of the soil is called___________
15. bowl Soil loss on the Great Plains caused by wind erosion is called________
17. The layer of soil that contains mostly clay and other minerals is called____________
18. The same geological processes of today and the past change Earths surface is called___________
24. Weathering Chemial process that breaks down rock is called__________
26. Grass roots and soil combined is called__________

1. The top crumbly part of soil that has a mixture of humus and clay is called____________
2. Organic material in soil that is dark colored is called___________
3. How we'll plants grow in the soil is called___________
4. Wedging when rock breaks apart water sinks in the cracks and freezes and moves is called_____________
5. Plowing To prevent soil loss by plowing the fields along the slope is called___________
6. The breakdown of rock through chemical and physical processes at Earths surface is called__________
10. Conversation Preventing the destruction of soil is called_________
13. Plowing Dead crops from the year before left in the ground too hold the soil in place is called________
16. When water can seep through tiny connected air spaces is called__________
19. Resources Things in the environment used by humans is called__________
20. when a substance combines with oxygen forming a chemical change is called__________
21. Weathering when rock is physically broken in smaller pieces is called____________
22. Rock particles carried in ice water or wind grinded away from other rock is called__________
23. Rock underneath the soil that is solid is called___________
25. Fertile soil that is made up clay sand and slit is called___________