What is a characteristic of the water that is expelled from hydrothermal vents?
a. The water is colder than when entering the vent
b. The water is enriched with metals.
c. The water has higher concentrations of organic material
d. The water has lower concentrations of dissolved gases
ANS: B
The water that is coming from hydrothermal vents is much warmer than the surrounding waters, but
the chemical composition is also different. It is more acidic, enriched with metals, and has higher
concentrations of dissolved gases. Information can be found in the section The Topography of Deep-
Ocean Basins Differs from That of the Continental Margins
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