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Weathering, Erosion, And Soil Formation
Test Description: Weathering, Erosion, and Soil Formation
Instructions: Answer all questions to get your test result.
1) What type of mechanical weathering occurs when rock is worn away by the grinding action of other rock particles?
A
acid rain
B
release of pressure
C
oxidation
D
abrasion
2) What type of weathering breaks down rock by freezing and thawing?
A
root wedging
B
acid rain
C
abrasion
D
ice wedging
3) What kind of weathering causes the mineral composition of rocks to change?
A
chemical AND mechanical weathering
B
chemical weathering
C
none of the above
D
mechanical weathering
4) What type of climate causes the fastest weathering?
A
hot and dry
B
cold and wet
C
cold and dry
D
hot and wet
5) What important factors determine the rate at which weathering takes place?
A
the amount of exposed surface area
B
the climate where the rock is located
C
all of the above
D
the type of rock (permable or impermeable)
6) Soil formation begins with the weathering of exposed __________________.
A
topsoil
B
sand
C
bedrock
D
litter
7) When soil is high in humus it will have ______________________.
A
high fertility
B
a light color
C
very few living organisms
D
low fertility
8) When earthworms add their wastes to the soil, then die and decay in the soil, they are contributing to the formation of what?
A
litter
B
humus
C
bedrock
D
the B horizon
9) How do living organisms help the soil?
A
they add spaces for air and water
B
the mix the soil
C
they add nutrients to the soil
D
all of the above
10) What do decomposers do?
A
They breakdown the remains of dead plants and animals
B
They add litter to the soil
C
They weather rocks into soil
D
They remove nutrients from the soil
11) Why is soil an important natural resource?
A
All living things on land depend on soil for survival.
B
Soil has 2 horizons.
C
Soil has earthworms.
D
Humans need soil for some recipes.
12) Topsoil erosion is most often caused by these two things ____________________.
A
tornados and earthquakes
B
hurricanes and earthquakes
C
tsunamis and wind
D
wind and water erosion
13) What term describes the management of soil to prevent its destruction?
A
soil conservation
B
litter
C
soil horizons
D
soil erosion
14) The practice of plowing fields along the curves of a slope is called _______________.
A
no till
B
conservation plowing
C
all of the above
D
contour plowing
15) Ice wedging and root wedging are both examples of what type of weathering?
A
mechanical weathering
B
all of the above
C
chemical weathering
D
none of the above
*select an answer for all questions
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