Characteristics of estuaries include all of the following except:
a. an abundance of nutrients
b. extreme temperature ranges.
c. a variation of salinity from fresh to salt water.
d. low biological productivity.
d
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Correctly complete the following sentence using the terms in the lists below: ____ is the chemical name of the mineral ____, which is secreted by most marine organisms. This makes up the rock ____.
a. silicon dioxide, calcite, limestone b. calcium carbonate, quartz, limestone c. silicon dioxide, quartz, chert d. calcium carbonate, calcite, limestone e. calcium carbonate, calcite, cher
Archeologists believe that the first island to have been discovered by Pacific Islanders from Polynesia was ________
A) Kauai B) Niihau C) Molokai D) Lanai
High-speed winds can cause ________, clouds of sand moving rapidly near the land surface.
A. deflation B. sand storms C. dust devils D. bajadas E. dust clouds
Increases in maize and soy production have led to ________.
A. an increase in healthy grain products at a reduced cost. B. the removal of government farm subsidy programs. C. an increased consumption of meat. D. cheap ethanol fuel.