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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
tides, waves and currents
B
effect of oozes
C
human activity
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
faster than
B
equal to
C
slower than
D
dependent on
4) Deep ocean sediments tend to have proportionately ____________ biogenous sediment than continental shelf sediment
A
less
B
more
5) Siliceous deposits tend to dominate below the carbonate compensation depth because
A
calcerous organisms cannot live that deep
B
siliceous organisms are more productive below the carbonate compensation depth
C
at or below the carbonate compensation depth, calcareous material dissolves as quickly as it accumulates
6) Deep Ocean sediments tend to have the same particle composition as the surface water above it because
A
the dense fecal pellets of large planktonic organisms carry material to the bottom relatively quickly
B
surface water isprimarily made of deep water
C
all of the above
D
small particles actually sink more quickly than large particles
7) Scientists are not exactly sure how ferromanganese and phosphotite nodules form, but they think a bilogicval process may be involved
A
true
B
false
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
dirty gold
B
unpolished gold
C
raw gold
D
crude oil
*select an answer for all questions
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