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Chapter4AWeatheringandSoil
Test Description: Science
Instructions: Answer all questions to get your test result.
1) decayed organic matter in soil
A
desertification
B
humus
C
mechanical weathering
D
exfoliation
2) desertification
A
expansion of desert conditions in areas where the natural plant cover has been destroyed
B
wearing down surface by friction
C
breaking down of rocks by physical forces
D
layers of rock break off due to pressure release
3) abrasion
A
layers of rock break off due to pressure release
B
expansion of desert conditions in areas where the natural plant cover has been destroyed
C
breakdown of rocks by chemical reactions
D
process in which objects rub against each other, wearing down the surface by friction
4) exfoliation
A
wearing down surface area by friction
B
process in which layers or sheets of rock gradually break off due to pressure release
C
decayed organic matter
D
breakdown of rocks by chemical reactions
5) chemical weathering
A
wearing down surface area by friction
B
expansion of desert conditions
C
layers or sheets of rock break off due to pressure release
D
break down of rocks by chemical reactions that change the rocks' make-up or composition
6) mechanical weathering
A
expansion of desert conditions
B
the breaking up of rocks by physical forces
C
decayed organic matter
D
breakdown of rocks by chemical reactions
7) When iron reacts with air and water to form rust
A
chemical weathering
B
mechanical weathering
C
desertification
8) The force of expanding water in rock cracks is an example of-
A
chemical weathering
B
abrasion
C
mechanical weathering
9) What is the MAIN component of soil?
A
humus
B
rock particles
C
water
10) Surface area, rock composition, and _____ affect the rate of weathering.
A
climate
B
texture
C
color
11) The movement of air and water through a soil is influenced MOST by the soil's-
A
microorganisms
B
color and chemistry
C
texture and pore space
12) Soil is a mixture of humus, rock particles, water, and____
A
air
B
plant roots
C
iron oxides
13) Contour plowing, strip-cropping, and terracing are designed to reduce--
A
pore space of soil
B
runoff of water
C
acidity of soil
14) An example of mechanical weathering includes
A
desertification
B
abrasion
C
rust
15) The four properties of soil are chemistry, pore space, color, and--
A
humus
B
iron
C
texture
*select an answer for all questions
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