Describe the plankton collection methods used by researchers. Fill in the blank(s) with the appropriate word(s)
Plankton nets are conical nets that are customarily made of nylon or Dacron cloth woven in a
fine interlocking pattern to assure consistent spacing between threads. The net is hauled
slowly for a known distance behind a ship, or it is cast to a set depth, and then reeled in.
Trapped organisms are flushed to the pointed end of the net and carefully removed for
analysis. Quantitative analysis of plankton requires both a count of the organisms and an
estimate of the sampled volume of water. Very small plankton can slip through a plankton
net. Their capture and study requires concentration by centrifuge, or entrapment by a fine
plankton filter through which water is drawn. The filter is later disassembled and the
plankton studied in place. The smallest of plankton are trapped by specially made unglazed
porcelain filters through which water is forced under very high pressure.
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What are the three major classifications of magma? How are they defined? What elements increase or
decrease in the composition of the three types? What will be an ideal response?
Meteorologists use ____________________ radar to observe the winds and precipitation intensities associated with severe thunderstorms
Fill in the blank(s) with correct word
In a particular titration experiment a 30.0 mL sample of an unknown monoprotic acid required 25.0 mL of 0.200 M NaOH for the end point to be reached. What is the concentration of the acid?
A) 0.120 M B) 0.167 M C) 0.240 M D) 0.333 M
Marketable permits can be viewed as a form of improved _______________.
A. command-and-control regulations B. property rights C. refundable tax credits D. flat fee pollution tax