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Weathering, Soil, and Erosion

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Weathering, Soil, and Erosion Ch. 7 & 8 Review Questions The agent of mechanical weathering in which rock is worn away by the grinding action of other rock particles ... – PowerPoint PPT presentation

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Title: Weathering, Soil, and Erosion


1
Weathering, Soil, and Erosion
  • Ch. 7 8
  • Review Questions

2
The agent of mechanical weathering in which rock
is worn away by the grinding action of other rock
particles is
  • A. erosion
  • B. cracking and peeling
  • C. abrasion
  • D ice wedging

3
What kind of weathering causes the mineral
composition of rocks to change?
  • A. mechanical
  • B. permeable
  • C. chemical
  • D. general

4
A hot and wet climate causes weathering to take
place
  • A. slowly
  • B. at the same rate as when the limate is dry and
    cool
  • C. unevenly
  • D. rapid

5
Soil formation begins with the weathering of
  • A. litter
  • B. rock
  • C. the A horizon
  • D. humus

6
The mixture of rock particles, minerals, decayed
organic material, air, and water is called
  • A. gravel
  • B. litter
  • C. silt
  • D. soil

7
The decayed organic material in soil is called
  • A. silt
  • B. litter
  • C. humus
  • D. clay

8
Which soil particle is the largest?
  • A. gravel
  • B. sand
  • C. silt
  • D. clay

9
Which soil particle is the smallest?
  • A. sand
  • B. gravel
  • C. clay
  • D. silt

10
The layer of soil in which topsoil is found is
the
  • A. A horizon
  • B. B horizon
  • C. C horizon
  • D. bedrock

11
Most of the work of mixing humus within the soil
is done by
  • A. fungi
  • B. ants
  • C. earthworms
  • D. bacteria

12
The solid layer of rock beneath the soil is
called
  • A. bedrock
  • B. gravel
  • C. the B horizon
  • D. subsoil

13
The process by which natural forces move
weathered rock and soil from one place to another
is called
  • A. soil conservation
  • B. deposition
  • C. abrasion
  • D. erosion

14
The process in which sediment is laid down in a
new location is called
  • A. weathering
  • B. deposition
  • C. erosion
  • D. mass movement

15
Landslides, mudflows, slump, and creep are all
examples of
  • A. mechanical weathering
  • B. runoff
  • C. mass movement
  • D. soil formation

16
Mass movement is caused by
  • A. plucking and abrasion
  • B. gravity
  • C. chemical weathering
  • D. erosion and deposition

17
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