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Chapter4AWeatheringandSoil
Test Description: Science
Instructions: Answer all questions to get your test result.
1) decayed organic matter in soil
A
mechanical weathering
B
humus
C
exfoliation
D
desertification
2) desertification
A
breaking down of rocks by physical forces
B
expansion of desert conditions in areas where the natural plant cover has been destroyed
C
wearing down surface by friction
D
layers of rock break off due to pressure release
3) abrasion
A
expansion of desert conditions in areas where the natural plant cover has been destroyed
B
layers of rock break off due to pressure release
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
breakdown of rocks by chemical reactions
B
process in which layers or sheets of rock gradually break off due to pressure release
C
wearing down surface area by friction
D
decayed organic matter
5) chemical weathering
A
break down of rocks by chemical reactions that change the rocks' make-up or composition
B
expansion of desert conditions
C
wearing down surface area by friction
D
layers or sheets of rock break off due to pressure release
6) mechanical weathering
A
breakdown of rocks by chemical reactions
B
decayed organic matter
C
expansion of desert conditions
D
the breaking up of rocks by physical forces
7) When iron reacts with air and water to form rust
A
mechanical weathering
B
chemical 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
texture
B
color
C
climate
11) The movement of air and water through a soil is influenced MOST by the soil's-
A
texture and pore space
B
color and chemistry
C
microorganisms
12) Soil is a mixture of humus, rock particles, water, and____
A
plant roots
B
air
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
rust
B
abrasion
C
desertification
15) The four properties of soil are chemistry, pore space, color, and--
A
texture
B
iron
C
humus
*select an answer for all questions
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