1. Soil Formation

2. Constantly changing resource made from rock and mineral fragments, humus, air, and water

3. Soil
Constantly changing resource made from rock and mineral fragments, humus, air, and water

4. Decayed plant and animal material in the ground

5. Humus
Decayed plant and animal material in the ground

6. A change in the chemical composition of rock that helps break it down into smaller pieces

7. Chemical Weathering
A change in the chemical composition of rock that helps break it down into smaller pieces

8. The physical breakdown of rock into smaller pieces

9. Mechanical Weathering
The physical breakdown of rock into smaller pieces

10. The transportation of sediment from one place to another by wind, flowing water, ice, or gravity

11. Erosion
The transportation of sediment from one place to another by wind, flowing water, ice, or gravity

12. The dropping of sediment by flowing water, wind, or glaciers when their movement slows

13. Deposition
The dropping of sediment by flowing water, wind, or glaciers when their movement slows

14. A mound of sand deposited by wind erosion

15. Dune
A mound of sand deposited by wind erosion

16. A huge mass of slowly moving ice

17. Glacier
A huge mass of slowly moving ice

18. The sliding of huge amounts of rocks and sediment down a hill or a mountain

19. Landslide http://www.wimp.com/massivelandslide/
The sliding of huge amounts of rocks and sediment down a hill or a mountain

20. Rich fertile soil that is made up of about equal parts of clay, sand, and silt

21. Loam
Rich fertile soil that is made up of about equal parts of clay, sand, and silt

22. A measure of how well soil supports plant growth

23. Fertility
A measure of how well soil supports plant growth

24. An organism that gets energy by breaking down the remains of dead organisms into smaller pieces

25. Decomposer
An organism that gets energy by breaking down the remains of dead organisms into smaller pieces

26. A layer of soil that differs in color and texture from the layers above or below it
humus
topsoil
subsoil
bedrock

27. Soil horizon
A layer of soil that differs in color and texture from the layers above or below it
humus
topsoil
subsoil
bedrock

28. The crumbly, top most layer of soil made up of clay, other minerals and humus.

29. Topsoil
The crumbly, top most layer of soil made up of clay, other minerals and humus.

30. The layer of soil below topsoil that has less plant and animal matter than topsoil and contains mostly clay and other minerals

31. Subsoil
The layer of soil below topsoil that has less plant and animal matter than topsoil and contains mostly clay and other minerals

32. The solid layer of rock beneath the soil.

33. Bedrock
The solid layer of rock beneath the soil.