Vocabulary

1. Soil: contains weathered rocks (sand, silt, clay), organic matter, air and water.
2. Organic matter: decomposing plant and animal materials found in top soil. 
3. Soil composition: the ingredients that make up a sample of soil.
4. Nutrients: essential elements required by and organism to grow and reproduce.
5. Decompose: break down of plantas, animals, etc. Into to soil.
6. Weathering: breakup of rocks caused by chemical or mechanical processes .
7. Pieces of weathered rock: sand, silt and clay .
8. Sand: largest particles, stay at botton .
9. Silt: medium particles. 
10. Clay: small particles, stay towards the top. 
11. Soil layers: organic, top soil, sub soil, parent material and bedrock.
12. Top soil: weathered rocks, organic matter, air and water .
13. Subsoil: some chemical found in topsoil, not much organic matter.
14. Parent material: slight broken up bredock, no plant roots, very little organic matter .
15. Bredock: hard rock. 
16. Texture: how soil feels. 
17. Grainy: large pieces, sand like .
18. Silky: medium pieces, silt like .
19. Sticky: small pieces, clay like .
20. Color: chocolate brown, reddish brown, yellowish brown, grayish brown .
21. Consistence: how easily soil breaks apart .
22. Loose: soil breaks apart when held .
23. Friable: breaks apart with small amount of pressure from one finger.
24. Firm: breaks apart with a lot of pressure from two fingers.