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Worksheet 54: Perm/Por Review
1. The diagrams below represent two identical containers
filled with nonporous uniform particles. The containers
represent models of two different sizes of soil particles.
5. Base your answer to the following question on the
diagrams below, which represent cross sections of four
samples of loosely packed, uniformly sorted soil
particles. The diameter of the particles is given below
each diagram. All soil samples consist of solid spherical
particles.
Compared to the model containing larger particles, the
model containing smaller particles has
A)
B)
C)
D)
less permeability and greater porosity
greater porosity and greater capillarity
less permeability and greater capillarity
greater permeability and greater porosity
2. Soil with the greatest porosity has particles that are
A)
B)
C)
D)
poorly sorted and densely packed
poorly sorted and loosely packed
well sorted and densely packed
well sorted and loosely packed
Which sample has the greatest permeability?
A) A
B) B
C) C
D) D
6. Base your answer to the following question on the
diagrams below, which represent cross sections of four
samples of loosely packed, uniformly sorted soil
particles. The diameter of the particles is given below
each diagram. All soil samples consist of solid spherical
particles.
3. Soil with the lowest porosity is composed of particles
that are all
A)
B)
C)
D)
different sizes and shapes
large and angular
small and rounded
large and rounded
4. Which soil conditions normally result in the greatest
amount of runoff?
A)
B)
C)
D)
low permeability and gentle slope
low permeability and steep slope
high permeability and gentle slope
high permeability and steep slope
Some particles from sample D are mixed with particles
from sample A. Compared to the original permeability of
sample A, the permeability of the resulting mixture will
be
A) less
C) the same
B) greater
7. The diagrams below represent two containers, each filled
with a sample of nonporous particles of uniform size.
Compared to the sample of larger particles, the sample of
smaller particles has
A) lower permeability
C) less porosity
B) higher permeability
D) more porosity
8. Which condition is most likely to cause surface runoff
during a rainstorm?
A) The permeability of the soil is greater than the rate
of rainfall.
B) The porosity of the soil is greater than the amount
of rainfall.
C) The surface slope allows for maximum infiltration.
D) The surface soil is saturated.
9. Base your answer to the following question on your
knowledge of Earth science, the Earth Science Reference
Tables, and the diagram below which represents a
geologic cross section of a region receiving rainfall.
Interfaces are indicated by the letters A through F.
10. During a heavy rainstorm, soil samples A and B both
became saturated with water. However, 10 minutes
after the storm ended, the soils appeared as shown
below.
Which statement best explains the observed change in
the water content of the soil samples?
A) The permeability of B is greater than the
permeability of A.
B) The porosity of B is greater than the porosity of A.
C) The capillarity of B is greater than the capillarity
of A.
D) The surface runoff at B is greater than the surface
runoff at A.
11. Which surface soil type has the slowest permeability
rate and is most likely to produce flooding?
A) pebbles
C) silt
B) sand
D) clay
A)
B)
C)
D)
Which one of the Earth's materials shown in the diagrams
below would have the greatest permeability?
12. Which diagram represents the soil with the greatest
permeability?
A)
B)
C)
D)
13. Base your answer to the following question on on the diagram below, which shows laboratory materials
used for an investigation of the effects of sediment size on permeability, porosity, and water retention. Four
separate columns, labeled A through D, were filled to the same level with different sediments. The
sediments within each column are of uniform size.
An equal amount of water is poured through each column. On the grid, draw a line to show the relative
amount of water retained in the sediment after the water flows through each column.
Base your answers to questions 14 and 15 on the diagram, data and information below. The diagram below
represents part of the laboratory setup for an activity to investigate the effects of particle size on
permeability, porosity, and water retention. Three separate tubes were used, each containing 300 milliliters
of beads of uniform size. Bead sizes were 4 millimeters, 7 millimeters, and 12 millimeters in diameter,
respectively.
14. Water can infiltrate loose soil when the soil is
A) saturated and permeable
C) unsaturated and permeable
B) saturated and permeable
D) unsaturated and impermeable
15. What was the total amount of water retained on the 7-millimeter beads after the tubing was unclamped and
the water flowed out?
A) 8 mL
B) 12 mL
C) 22 mL
D) 36 mL