Colloidal properties are exhibited by the ________ fraction of soils.

Colloidal properties are exhibited by the ________ fraction of soils.
 
  A) clay B) gravel C) sand D) silt

Question 2

Texture describes the ________ of particles in a soil.
 
  A) colors
  B) sizes
  C) mineralogical makeup
  D) roughness
  E) arrangement

Question 3

Soil colors are scientifically described by ________ color designations such as 10YR3/4.
 
  A) wavelength B) USDA C) structural D) Munsell E) Parson's

Question 4

Brown and red colors in subsurface horizons are caused by ________ in the soil.
 
  A) clay
  B) manganese
  C) organic matter
  D) iron oxides
  E) aluminum oxides

Question 5

Histosols generally have higher organic matter contents than Mollisols.
 
  Indicate whether the statement is true or false

Question 6

You would be more apt to find an Gelisol in Alaska than in Iowa.
 
  Indicate whether the statement is true or false