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Ch 12
Test Description: Sediment
Instructions: Answer all questions to get your test result.
1) Continental shelf sedimentation is strongly controlled by
A
effect of oozes
B
human activity
C
tides, waves and currents
2) Coarse particle deposits found on the continental shelf bottom thought to be left from when the sea level are called
A
cosmosgenous sediments
B
recent sediments
C
relict sediments
3) The rate of continental shelf sedimentation is generally ________ the rate of deep ocean sedimentation
A
slower than
B
faster than
C
equal to
D
dependent on
4) Deep ocean sediments tend to have proportionately ____________ biogenous sediment than continental shelf sediment
A
more
B
less
5) Siliceous deposits tend to dominate below the carbonate compensation depth because
A
at or below the carbonate compensation depth, calcareous material dissolves as quickly as it accumulates
B
calcerous organisms cannot live that deep
C
siliceous organisms are more productive below the carbonate compensation depth
6) Deep Ocean sediments tend to have the same particle composition as the surface water above it because
A
all of the above
B
small particles actually sink more quickly than large particles
C
surface water isprimarily made of deep water
D
the dense fecal pellets of large planktonic organisms carry material to the bottom relatively quickly
7) Scientists are not exactly sure how ferromanganese and phosphotite nodules form, but they think a bilogicval process may be involved
A
false
B
true
8) the study of sediments has economic importance because scientists hope to find economically improtant materials there one day
A
true
B
false
9) scientists have found economically important materials in the ocean's sediment
A
true
B
false
10) What is black gold?
A
unpolished gold
B
crude oil
C
dirty gold
D
raw gold
*select an answer for all questions
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