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Weathering And Erosion
Test Description: 1. Mechanical and chemical forces break down rocks. 2. Weathering and organic processes form soil. Chap. 4
Instructions: Answer all questions to get your test result.
1) The force of freezing water in the cracks and pores of a rock is an example of
A
oxidation
B
desertification
C
chemical weathering
D
mechanical weathering
2) The breakdown of rock by acidic water is an example of
A
mechanical weathering
B
chemical weathering
C
oxidation
D
desertification
3) Soil is a mixture of what four materials?
A
rock particles, humus, water and air
B
rock particles, plant roots, humus, and nitrogen
C
granite, limestone, nitrogen, air
D
plant roots, iron oxides, water, and air
4) What is the main component of soil?
A
water
B
air
C
rock particles
D
humus
5) What is humus?
A
the material that makes up the C horizon
B
decomposed organic matter in soil
C
decomposed rock particles in soil
D
the material that makes up the B horizon
6) Three factors that affect the rate of weathering are:
A
microorganisms, plants, and animals
B
weather, landforms, and rainfall
C
surface area, rock composition, and climate
D
texture, color, and pore space
7) Microorganisms affect the quality of soil by
A
increasing mechanical weathering
B
decomposing organic matter
C
creating tunnels
D
absorbing water
8) The movement of air and water through a soil is influenced by the soil's
A
color and chemistry
B
texture and pore space
C
ph and nitrogen content
D
microorganisms
9) Contour plowing, strip cropping, and terracing are conservation methods designed to reduce the
A
runoff of water
B
pore space of soil
C
activity of microorganisms
D
acidity of soil
10) Which one is Not a soil conservation method?
A
windbreaks
B
crop rotation
C
strip mining
D
terraces
*select an answer for all questions
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