1. Ga Ag Ed Curriculum Office, July 2002 Adapted for Colorado Soils Curriculum 2006

2. Let’s Get Physical 1111 3333 2222 4444 5555 1111 3333 2222 4444 5555 1111 3333 2222 4444 5555 1111 3333 2222 4444 5555 1111 3333 2222 4444 5555 Expanding Horizons Soil Color It’s How You Feel General Soil

3. Question: The _____ of the soil refers to the size of the individual soil particles. Check Your Answer Phy. Properties for 1

4. Answer: texture Back to the Game Board Phy. Properties for 1

5. Question: Positively charged nutrients in the soil are called ________. Check Your Answer Phy. Properties for 2

6. Answer: cations Back to the Game Board Phy. Properties for 2

7. Question: What is slope? Check Your Answer Phy. Properties for 3

8. Answer: reflects the change in elevation of the soil surface over 100’ horizontally Back to the Game Board Phy. Properties for 3

9. Question: What determines the acid level of the soil? Check Your Answer Phy. Properties for 4

10. Answer: pH Back to the Game Board Phy. Properties for 4

11. Question: Groups of clinging soil particles are called ______. Check Your Answer Phy. Properties for 5

12. Answer: peds Back to the Game Board Phy. Properties for 5

13. Question: Soil from rock or from organic material will form in layers that lie ____ to the surface of earth. Check Your Answer Soil Horizons for 1

14. Answer: parallel Back to the Game Board Soil Horizons for 1

15. Question: If the upper horizon is classified as an “Ap” Horizon – what does that mean? Check Your Answer Soil Horizons for 2

16. Answer: It is an A horizon that has been “plowed” or disturbed. Back to the Game Board Soil Horizons for 2

17. Question: The “A” horizon is generally _____ than the horizons below and may be from a few inches to several feet thick. Check Your Answer Soil Horizons for 3

18. Answer: darker Back to the Game Board Soil Horizons for 3

19. Question: The bedrock upon which the other soil horizons rest is called the __ horizon. Check Your Answer Soil Horizons for 4

20. Answer: “R” Back to the Game Board Soil Horizons for 4

21. Question: This layer is the material from which soil originated. Check Your Answer Soil Horizons for 5

22. Answer: “C” Horizon Back to the Game Board Soil Horizons for 5

23. Question: What is one factor that gives soil color? Check Your Answer Soil Color for 1

24. Answer: One of: 1.Organic matter 2.Weathered mineral matter 3.Iron present Back to the Game Board Soil Color for 1

25. Question: What are the basic color classifications of soils? Check Your Answer Soil Color for 2

26. Answer: 1.Light 2.Medium 3.Dark Back to the Game Board Soil Color for 2

27. Question: What standard chart is used to determine soil color in the field? Check Your Answer Soil Color for 3

28. Answer: Munsell Color Chart Back to the Game Board Soil Color for 3

29. Question: What is the difference between Hue, Value, and Chroma? Check Your Answer Soil Color for 4

30. Answer: Hue: dominant spectral (red, yellow, blue, green) Value: relative blackness or whitness Chroma: Purity of “color” Back to the Game Board Soil Color for 4

31. Question: What are mottles in the soil? Check Your Answer Soil Color for 5

32. Answer: spots of colors in the soil – usually indicates poor aeration Back to the Game Board Soil Color for 5

33. Question: What is the smallest soil texture? Check Your Answer Soil – Texture for 1

34. Answer: Clay Back to the Game Board Soil - Texture for 1

35. Question: What is the largest soil particle type? Check Your Answer Soil - Texture for 2

36. Answer: sand Back to the Game Board Soil - Texture for 2

37. Question: How can you test soil texture? Check Your Answer Soil - Texture for 3

38. Answer: (a) Ribboning method (b) using soil sieves to measure Back to the Game Board Soil - Texture for 3

39. Question: What are the 3 soil types? Check Your Answer Soil - Texture for 4

40. Answer: 1) Sand 2) Silt 3) Clay Back to the Game Board Soil - Texture for 4

41. Question: What does loam mean? Check Your Answer Soil - Texture for 5

42. Answer: A mixture of sand, silt, clay Back to the Game Board Soil - Texture for 5

43. Question: _______ is the most precious natural resource we have. Check Your Answer Soil for 1

44. Answer: soil Back to the Game Board Soil for 1

45. Question: _____ are soils derived from volcanic sources. Check Your Answer Soil for 2

46. Answer: andisols Back to the Game Board Soil for 2

47. Question: The most common soil organisms are _________. Check Your Answer Soil for 3

48. Answer: nematodes Back to the Game Board Soil for 3

49. Question: _____ are soils that settle to the bottom of rivers and streams when the water is moving rapidly. Check Your Answer Soil for 4

50. Answer: alluvial Back to the Game Board Soil for 4

51. Question: The broadest soil grouping is called ________. Check Your Answer Soil for 5

52. Answer: soil order Back to the Game Board Soil for 5