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
You might also like to view...
In general, countries that enjoy the best health have
A) the warmest climates. B) diets primarily based on eating grains. C) the largest families. D) good educational systems, particularly for women.
Extrusive igneous cooled and hardened ________ Earth's surface, resulting in ________ grained rocks
A) beneath; finer B) beneath; coarser C) at; coarser D) at; finer
Consider the names of the eras in the geologic time scale. What is meant by "zoic"?
A) time; recording of events B) life; living things C) rocks; lithified strata D) places; geographic references
The relatively dry air and the Antarctic’s high elevation permit rapid ____________________ during the dark winter months, producing extremely cold surface air
Fill in the blank with correct word.