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Weathering And Soil Formation
Test Description: Weathering and Soil Formation
Instructions: Answer all questions to get your test result.
1) The agent of mechanical weathering in which rock is worn away by the grinding action of other rock particles is called
A
cracking and peeling.
B
erosion.
C
abrasion.
2) Ice wedging causes mechanical weathering of rock by means of
A
heating and cooling.
B
plant growth.
C
freezing and thawing of water.
3) What kind of weathering causes the mineral composition of rocks to change?
A
chemical weathering
B
mechanical weathering
C
permeable weathering
4) A hot and wet climate causes weathering to take place
A
rapidly.
B
slowly.
C
at the same rate as when the climate is dry and cool.
5) Soil formation begins with the weathering of
A
bedrock.
B
the A horizon.
C
litter.
6) Soil that is rich in humus has high
A
water content.
B
fertility.
C
sand content.
7) Living organisms in soil help to
A
slow the rate of soil formation.
B
build up the C horizon.
C
mix the soil and make humus.
8) Decomposers are the soil organisms that
A
store moisture in the soil.
B
burrow deep below the topsoil.
C
break down and digest the remains of dead organisms.
9) How long did it take for the thick, fertile soil of the North American prairies to develop?
A
several years
B
hundreds of years
C
thousands of years
10) What term describes the management of soil to prevent its destruction?
A
soil conservation
B
soil decomposition
C
soil exhaustion
*select an answer for all questions
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