The Residence Time of an Ion in the Oceans May

question 44

Multiple Choice

The residence time of an ion in the oceans may be determined by

• A) multiplying the input rate by the output rate.
• B) multiplying the total amount of the ion by either input or output rate.
• C) dividing the total amount of the ion by either input or output rate.
• D) dividing ionic concentration by input or output rate.
• E) multiplying ionic concentration by total amount of the ion.

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Definitions:

Observational Study

A study wherein researchers observe and record data without manipulating any variables, in contrast to an experimental study.

Matched Pairs

A study design in which subjects are paired based on specific characteristics, with one in each pair receiving treatment and the other not.

Blocking

A technique in experimental design used to reduce the effects of nuisance variables by grouping subjects into blocks based on these variables.

Experimental Unit

The smallest division of the experimental material such that any two units may receive different treatments during the experiment.