In lakes, the nutrient-rich water near the shore is part of the
a. limnetic zone
b. benthic zone
c. littoral zone
d. profundal zone
e. abyssal zone
C
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What is the name for the pelagic community that lives in the upper limits of the permanent darkness in the deep ocean?
A) Climax community B) Rift community C) Deep scattering layer D) Benthic community
The chief ingredient of most solar cells is ____.
A. silicon B. sodium C. chromium D. arsenic E. calcium
If satellites can measure the depth of the sea floor, why is it necessary to make bathymetry soundings from a ship?
a) Multi-beam echo sounders provide information in addition to depth, including the composition of the seafloor b) The shape of the sea surface as measured by satellites does not exactly mimic the bathymetry of the seafloor c) Satellites do not actually measure ocean depth d) Shipboard data is needed to calibrate satellite sea surface height measurements e) All of the above
Study Figure 15.11 in your textbook. At which minimum angle will the component of gravity that pulls a boulder downward be greater than the component of gravity that holds a boulder against a surface?
A) 0 B) 30 C) 60 D) 90