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ES Ch 5 4 Of 5
Test Description: Earth Science BMCHS
Instructions: Answer all questions to get your test result.
1) Pedalfer soils would most likely be found
A
on an island close to the equator
B
in the dry areas of the western US
C
in the eastern half of the US
D
in a tropical rainforest
2) Compared to the past, rates of soil erosion are
A
slower
B
faster
C
about the same
D
more unpredictable
3) The rate of soil erosion deppends on
A
vegetation
B
climate
C
all of the answers listed
D
slope
4) Since humans have appeared, the amount of sediments carried by rivers has
A
stayed the same
B
increased dramatically
C
decreased
D
increased slightly
5) What is the correct order for water eroding soil
A
sheet erosion, rills, gullies
B
sheet erosion, gullies, rills
C
gullies, rills, sheet erosion
D
rills, sheet erosion, gullies
6) The process responsible for moving material down slope under the influence of graviity is called
A
soil formation
B
weathering
C
erosion
D
mass movement
7) What is the force behind mass movements
A
moving water
B
gravity
C
sun's energy
D
moving ice
8) Why can the removal of vegetation trigger mass movements
A
plant roots bind the soil and regolith together
B
soil loses nutrients and begins to crumble
C
shaking triggers mass movements
D
plant roots llubricate the loose sediment
9) Oversteepened slopes often lead to mass movements because
A
the angle of the slope is less the 20 degrees
B
plants cannot grow on them
C
the angle of the slope is greater than 40 degrees
D
the angle of the slope is between 10 and 20 degrees
10) During what season would you expect mass movements to be a greater threat?
A
a wet spring with lots of growing vegetation
B
a dry summer
C
a wet spring before vegetation is growing
D
a dry autumn after the leaves have turned
*select an answer for all questions
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