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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
chemical weathering
C
desertification
D
mechanical weathering
2) The breakdown of rock by acidic water is an example of
A
chemical weathering
B
oxidation
C
mechanical weathering
D
desertification
3) Soil is a mixture of what four materials?
A
rock particles, plant roots, humus, and nitrogen
B
granite, limestone, nitrogen, air
C
plant roots, iron oxides, water, and air
D
rock particles, humus, water and air
4) What is the main component of soil?
A
rock particles
B
air
C
humus
D
water
5) What is humus?
A
the material that makes up the B horizon
B
decomposed rock particles in soil
C
the material that makes up the C horizon
D
decomposed organic matter in soil
6) Three factors that affect the rate of weathering are:
A
surface area, rock composition, and climate
B
texture, color, and pore space
C
weather, landforms, and rainfall
D
microorganisms, plants, and animals
7) Microorganisms affect the quality of soil by
A
decomposing organic matter
B
absorbing water
C
increasing mechanical weathering
D
creating tunnels
8) The movement of air and water through a soil is influenced by the soil's
A
microorganisms
B
ph and nitrogen content
C
texture and pore space
D
color and chemistry
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
crop rotation
B
terraces
C
windbreaks
D
strip mining
*select an answer for all questions
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