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Soils & Soil Physical Properties

Unit 2.1 | Part 2 – 35

Assessment Questions Key

TRUE – FALSE

1. Climate affects how a soil forms.

True False

2. Air is not an important part of soil.

True False

3. Clay holds more water than sand.

True False

4. Platy structure on the surface of the soil is
   desirable.

True False

5. Organic matter is not particularly beneficial to
   the physical condition of the soil.

True False

MULTIPLE CHOICE

1. Which of the following is not a soil-forming
   factor?

a. Time

b. Parent Material

c. Soil Color

d. Topography

2. Of the soil separates listed below, which has
   the smallest particle size?

a. Sand

b. Silt

c. Clay

3. Which one of the following is not considered
   one of the major constituents of soil?

a. Chemical

b. Mineral

c. Organic matter

d. Pore space

4. Which of the following foods has a structure
   similar to silicate clays?
   a. Ice cream
   b. Cheese
   c. Cake
   d. Baklava


5. A soil that has a balanced amount of sand, silt
   and clay has which one of the following for a
   texture?
   a. Platy
   b. Loam
   c. Silt
   d. Granular


6. Of the following, which is the best to add to a
   clay soil to help offset the negative effects of
   the clay?
   a. Sand
   b. Silt
   c. Organic matter
   d. Sodium salts


7. Which one of the following does not
   contribute to the formation of soil structure?
   a. Biological factors
   b. Amount and type of clay
   c. Iron
   d. Climate


8. Grey or mottled colors in the soil indicate past
   or present:
   a. Wormholes
   b. Wetness
   c. Drought
   d. Texture


9. The rate at which water moves through the
   soil is called:
   a. Porosity
   b. Hydraulic speed
   c. Permeability
   d. Saturation potential

Assessment Questions Key