AnswersSNHS NV-Environmental ScienceWhat Are Natural Resources?

Soil Formation Answers

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Which of the following is defined as combinations of soil particles that vary in size and shape?

A
clay
B
aggregates
C
silt
D
loam
2
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Where does the organic material in soil originate?

A
physical weathering
B
chemical weathering
C
decomposing plant and animal matter
D
the atmosphere
3

Animals contribute to soil formation through decomposition of organic material.

A
T
B
F
4

Which of the following factors does not affect soil formation?

A
precipitation
B
time
C
erosion
D
none of the above
5

Soil is not directly important to animal life.

A
T
B
F
6

Soil is a mixture of _______.

A
solids
B
solids, liquids, and gases
C
solids and liquids
D
solids and gases
7

What causes soils and their horizons to differ?

A
differences in climates where the soils are formed
B
differences in plant and animal life in different locations
C
differences in the layout of the land
D
all of the above
8

Which of the following will be most influenced by the amount of organic material?

A
soil color
B
soil texture
C
soil structure
D
number of horizons
9

Which of the following soil particle types is the largest?

A
sand
B
silt
C
clay
D
potassium
10

Which of the following areas would most likely have the deepest layer of topsoil?

A
desert
B
beach
C
grassland
D
mountaintop

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