What is the name for a zone that decreases in temperature with depth?
a. Pycnocline
b. Thermocline
c. Halocline
d. Mixed layer
ANS: B
The thermocline is the zone in which temperature decreases rapidly. This is a major factor in changing
density, and subsequently the pycnocline. Information can be found in the section The Ocean Is
Stratified by Density.
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